Refactored getClass() to support spaces in class names.
git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@345284 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
James W. Carman
parent
502f7f4a19
commit
39c9476337
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@ -23,223 +23,264 @@ import java.util.Map;
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/**
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* <p>Operates on classes without using reflection.</p>
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*
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* <p>This class handles invalid <code>null</code> inputs as best it can.
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* Each method documents its behaviour in more detail.</p>
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* <p/>
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* <p>This class handles invalid <code>null</code> inputs as best it can. Each method documents its behaviour in more
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* detail.</p>
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*
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* @author Stephen Colebourne
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* @author Gary Gregory
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* @author Norm Deane
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* @author Alban Peignier
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* @since 2.0
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* @version $Id$
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* @since 2.0
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*/
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public class ClassUtils {
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public class ClassUtils
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{
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/**
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* <p>The package separator character: <code>'.' == {@value}</code>.</p>
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*/
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public static final char PACKAGE_SEPARATOR_CHAR = '.';
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/**
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* <p>The package separator String: <code>"."</code>.</p>
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*/
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public static final String PACKAGE_SEPARATOR = String.valueOf(PACKAGE_SEPARATOR_CHAR);
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public static final String PACKAGE_SEPARATOR = String.valueOf( PACKAGE_SEPARATOR_CHAR );
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/**
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* <p>The inner class separator character: <code>'$' == {@value}</code>.</p>
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*/
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public static final char INNER_CLASS_SEPARATOR_CHAR = '$';
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/**
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* <p>The inner class separator String: <code>"$"</code>.</p>
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*/
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public static final String INNER_CLASS_SEPARATOR = String.valueOf(INNER_CLASS_SEPARATOR_CHAR);
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/**
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* Maps primitive <code>Class</code>es to their corresponding wrapper <code>Class</code>.
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*/
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private static Map primitiveWrapperMap = new HashMap();
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static {
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primitiveWrapperMap.put(Boolean.TYPE, Boolean.class);
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primitiveWrapperMap.put(Byte.TYPE, Byte.class);
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primitiveWrapperMap.put(Character.TYPE, Character.class);
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primitiveWrapperMap.put(Short.TYPE, Short.class);
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primitiveWrapperMap.put(Integer.TYPE, Integer.class);
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primitiveWrapperMap.put(Long.TYPE, Long.class);
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primitiveWrapperMap.put(Double.TYPE, Double.class);
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primitiveWrapperMap.put(Float.TYPE, Float.class);
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primitiveWrapperMap.put(Void.TYPE, Void.TYPE);
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}
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public static final String INNER_CLASS_SEPARATOR = String.valueOf( INNER_CLASS_SEPARATOR_CHAR );
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/**
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* <p>ClassUtils instances should NOT be constructed in standard programming.
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* Instead, the class should be used as
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* <code>ClassUtils.getShortClassName(cls)</code>.</p>
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*
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* <p>This constructor is public to permit tools that require a JavaBean
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* instance to operate.</p>
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* Maps primitive <code>Class</code>es to their corresponding wrapper <code>Class</code>.
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*/
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public ClassUtils() {
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super();
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private static Map primitiveWrapperMap = new HashMap();
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static
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{
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primitiveWrapperMap.put( Boolean.TYPE, Boolean.class );
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primitiveWrapperMap.put( Byte.TYPE, Byte.class );
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primitiveWrapperMap.put( Character.TYPE, Character.class );
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primitiveWrapperMap.put( Short.TYPE, Short.class );
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primitiveWrapperMap.put( Integer.TYPE, Integer.class );
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primitiveWrapperMap.put( Long.TYPE, Long.class );
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primitiveWrapperMap.put( Double.TYPE, Double.class );
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primitiveWrapperMap.put( Float.TYPE, Float.class );
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primitiveWrapperMap.put( Void.TYPE, Void.TYPE );
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}
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/**
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* Maps a primitive class name to its corresponding abbreviation used in array class names.
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*/
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private static Map abbreviationMap = new HashMap();
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static
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{
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abbreviationMap.put( "int", "I" );
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abbreviationMap.put( "boolean", "Z" );
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abbreviationMap.put( "float", "F" );
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abbreviationMap.put( "long", "J" );
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abbreviationMap.put( "short", "S" );
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abbreviationMap.put( "byte", "B" );
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abbreviationMap.put( "double", "D" );
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abbreviationMap.put( "char", "C" );
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}
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/**
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* <p>ClassUtils instances should NOT be constructed in standard programming. Instead, the class should be used as
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* <code>ClassUtils.getShortClassName(cls)</code>.</p>
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* <p/>
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* <p>This constructor is public to permit tools that require a JavaBean instance to operate.</p>
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*/
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public ClassUtils()
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{
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super();
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}
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// Short class name
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// ----------------------------------------------------------------------
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/**
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* <p>Gets the class name minus the package name for an <code>Object</code>.</p>
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*
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* @param object the class to get the short name for, may be null
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* @param valueIfNull the value to return if null
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*
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* @param object the class to get the short name for, may be null
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* @param valueIfNull the value to return if null
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* @return the class name of the object without the package name, or the null value
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*/
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public static String getShortClassName(Object object, String valueIfNull) {
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if (object == null) {
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public static String getShortClassName( Object object, String valueIfNull )
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{
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if( object == null )
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{
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return valueIfNull;
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}
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return getShortClassName(object.getClass().getName());
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return getShortClassName( object.getClass().getName() );
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}
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/**
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* <p>Gets the class name minus the package name from a <code>Class</code>.</p>
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*
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* @param cls the class to get the short name for.
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*
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* @param cls the class to get the short name for.
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* @return the class name without the package name or an empty string
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*/
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public static String getShortClassName(Class cls) {
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if (cls == null) {
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public static String getShortClassName( Class cls )
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{
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if( cls == null )
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{
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return StringUtils.EMPTY;
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}
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return getShortClassName(cls.getName());
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return getShortClassName( cls.getName() );
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}
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/**
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* <p>Gets the class name minus the package name from a String.</p>
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*
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* <p/>
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* <p>The string passed in is assumed to be a class name - it is not checked.</p>
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*
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* @param className the className to get the short name for
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*
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* @param className the className to get the short name for
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* @return the class name of the class without the package name or an empty string
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*/
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public static String getShortClassName(String className) {
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if (className == null) {
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public static String getShortClassName( String className )
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{
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if( className == null )
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{
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return StringUtils.EMPTY;
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}
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if (className.length() == 0) {
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if( className.length() == 0 )
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{
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return StringUtils.EMPTY;
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}
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char[] chars = className.toCharArray();
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int lastDot = 0;
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for (int i = 0; i < chars.length; i++) {
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if (chars[i] == PACKAGE_SEPARATOR_CHAR) {
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for( int i = 0; i < chars.length; i++ )
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{
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if( chars[i] == PACKAGE_SEPARATOR_CHAR )
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{
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lastDot = i + 1;
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} else if (chars[i] == INNER_CLASS_SEPARATOR_CHAR) { // handle inner classes
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}
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else if( chars[i] == INNER_CLASS_SEPARATOR_CHAR )
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{ // handle inner classes
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chars[i] = PACKAGE_SEPARATOR_CHAR;
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}
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}
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return new String(chars, lastDot, chars.length - lastDot);
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return new String( chars, lastDot, chars.length - lastDot );
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}
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// Package name
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// ----------------------------------------------------------------------
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/**
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* <p>Gets the package name of an <code>Object</code>.</p>
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*
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* @param object the class to get the package name for, may be null
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* @param valueIfNull the value to return if null
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*
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* @param object the class to get the package name for, may be null
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* @param valueIfNull the value to return if null
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* @return the package name of the object, or the null value
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*/
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public static String getPackageName(Object object, String valueIfNull) {
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if (object == null) {
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public static String getPackageName( Object object, String valueIfNull )
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{
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if( object == null )
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{
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return valueIfNull;
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}
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return getPackageName(object.getClass().getName());
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return getPackageName( object.getClass().getName() );
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}
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/**
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* <p>Gets the package name of a <code>Class</code>.</p>
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*
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* @param cls the class to get the package name for, may be <code>null</code>.
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*
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* @param cls the class to get the package name for, may be <code>null</code>.
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* @return the package name or an empty string
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*/
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public static String getPackageName(Class cls) {
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if (cls == null) {
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public static String getPackageName( Class cls )
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{
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if( cls == null )
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{
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return StringUtils.EMPTY;
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}
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return getPackageName(cls.getName());
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return getPackageName( cls.getName() );
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}
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/**
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* <p>Gets the package name from a <code>String</code>.</p>
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* <p/>
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* <p>The string passed in is assumed to be a class name - it is not checked.</p> <p>If the class is unpackaged,
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* return an empty string.</p>
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*
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* <p>The string passed in is assumed to be a class name - it is not checked.</p>
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* <p>If the class is unpackaged, return an empty string.</p>
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*
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* @param className the className to get the package name for, may be <code>null</code>
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* @param className the className to get the package name for, may be <code>null</code>
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* @return the package name or an empty string
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*/
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public static String getPackageName(String className) {
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if (className == null) {
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public static String getPackageName( String className )
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{
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if( className == null )
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{
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return StringUtils.EMPTY;
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}
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int i = className.lastIndexOf(PACKAGE_SEPARATOR_CHAR);
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if (i == -1) {
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int i = className.lastIndexOf( PACKAGE_SEPARATOR_CHAR );
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if( i == -1 )
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{
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return StringUtils.EMPTY;
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}
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return className.substring(0, i);
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return className.substring( 0, i );
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}
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// Superclasses/Superinterfaces
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// ----------------------------------------------------------------------
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/**
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* <p>Gets a <code>List</code> of superclasses for the given class.</p>
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*
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* @param cls the class to look up, may be <code>null</code>
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* @return the <code>List</code> of superclasses in order going up from this one
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* <code>null</code> if null input
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*
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* @param cls the class to look up, may be <code>null</code>
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* @return the <code>List</code> of superclasses in order going up from this one <code>null</code> if null input
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*/
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public static List getAllSuperclasses(Class cls) {
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if (cls == null) {
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public static List getAllSuperclasses( Class cls )
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{
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if( cls == null )
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{
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return null;
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}
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List classes = new ArrayList();
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Class superclass = cls.getSuperclass();
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while (superclass != null) {
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classes.add(superclass);
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while( superclass != null )
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{
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classes.add( superclass );
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superclass = superclass.getSuperclass();
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}
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return classes;
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}
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/**
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* <p>Gets a <code>List</code> of all interfaces implemented by the given
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* class and its superclasses.</p>
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* <p>Gets a <code>List</code> of all interfaces implemented by the given class and its superclasses.</p>
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* <p/>
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* <p>The order is determined by looking through each interface in turn as declared in the source file and following
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* its hierarchy up. Then each superclass is considered in the same way. Later duplicates are ignored, so the order
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* is maintained.</p>
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*
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* <p>The order is determined by looking through each interface in turn as
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* declared in the source file and following its hierarchy up. Then each
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* superclass is considered in the same way. Later duplicates are ignored,
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* so the order is maintained.</p>
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*
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* @param cls the class to look up, may be <code>null</code>
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* @return the <code>List</code> of interfaces in order,
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* <code>null</code> if null input
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* @param cls the class to look up, may be <code>null</code>
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* @return the <code>List</code> of interfaces in order, <code>null</code> if null input
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*/
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public static List getAllInterfaces(Class cls) {
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if (cls == null) {
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public static List getAllInterfaces( Class cls )
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{
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if( cls == null )
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{
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return null;
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}
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List list = new ArrayList();
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while (cls != null) {
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while( cls != null )
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{
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Class[] interfaces = cls.getInterfaces();
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for (int i = 0; i < interfaces.length; i++) {
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if (list.contains(interfaces[i]) == false) {
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list.add(interfaces[i]);
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for( int i = 0; i < interfaces.length; i++ )
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{
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if( list.contains( interfaces[i] ) == false )
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{
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list.add( interfaces[i] );
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}
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List superInterfaces = getAllInterfaces(interfaces[i]);
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for (Iterator it = superInterfaces.iterator(); it.hasNext();) {
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Class intface = (Class) it.next();
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if (list.contains(intface) == false) {
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list.add(intface);
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List superInterfaces = getAllInterfaces( interfaces[i] );
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for( Iterator it = superInterfaces.iterator(); it.hasNext(); )
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{
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Class intface = ( Class ) it.next();
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if( list.contains( intface ) == false )
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{
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list.add( intface );
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}
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}
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}
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@ -247,241 +288,262 @@ public class ClassUtils {
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}
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return list;
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}
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// Convert list
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// ----------------------------------------------------------------------
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/**
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* <p>Given a <code>List</code> of class names, this method converts them into classes.</p>
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* <p/>
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* <p>A new <code>List</code> is returned. If the class name cannot be found, <code>null</code> is stored in the
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* <code>List</code>. If the class name in the <code>List</code> is <code>null</code>, <code>null</code> is stored
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* in the output <code>List</code>.</p>
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*
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* <p>A new <code>List</code> is returned. If the class name cannot be found, <code>null</code>
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* is stored in the <code>List</code>. If the class name in the <code>List</code> is
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* <code>null</code>, <code>null</code> is stored in the output <code>List</code>.</p>
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*
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* @param classNames the classNames to change
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* @return a <code>List</code> of Class objects corresponding to the class names,
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* <code>null</code> if null input
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* @param classNames the classNames to change
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* @return a <code>List</code> of Class objects corresponding to the class names, <code>null</code> if null input
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* @throws ClassCastException if classNames contains a non String entry
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*/
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public static List convertClassNamesToClasses(List classNames) {
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if (classNames == null) {
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public static List convertClassNamesToClasses( List classNames )
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{
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if( classNames == null )
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{
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return null;
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}
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List classes = new ArrayList(classNames.size());
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for (Iterator it = classNames.iterator(); it.hasNext();) {
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String className = (String) it.next();
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try {
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classes.add(Class.forName(className));
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} catch (Exception ex) {
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classes.add(null);
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List classes = new ArrayList( classNames.size() );
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for( Iterator it = classNames.iterator(); it.hasNext(); )
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{
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String className = ( String ) it.next();
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try
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{
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classes.add( Class.forName( className ) );
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}
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catch( Exception ex )
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{
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classes.add( null );
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}
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}
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return classes;
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}
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/**
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* <p>Given a <code>List</code> of <code>Class</code> objects, this method converts
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* them into class names.</p>
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* <p>Given a <code>List</code> of <code>Class</code> objects, this method converts them into class names.</p>
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* <p/>
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* <p>A new <code>List</code> is returned. <code>null</code> objects will be copied into the returned list as
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* <code>null</code>.</p>
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*
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* <p>A new <code>List</code> is returned. <code>null</code> objects will be copied into
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* the returned list as <code>null</code>.</p>
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*
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* @param classes the classes to change
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* @return a <code>List</code> of class names corresponding to the Class objects,
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* <code>null</code> if null input
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* @param classes the classes to change
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* @return a <code>List</code> of class names corresponding to the Class objects, <code>null</code> if null input
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* @throws ClassCastException if <code>classes</code> contains a non-<code>Class</code> entry
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*/
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public static List convertClassesToClassNames(List classes) {
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if (classes == null) {
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public static List convertClassesToClassNames( List classes )
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{
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if( classes == null )
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{
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return null;
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}
|
||||
List classNames = new ArrayList(classes.size());
|
||||
for (Iterator it = classes.iterator(); it.hasNext();) {
|
||||
Class cls = (Class) it.next();
|
||||
if (cls == null) {
|
||||
classNames.add(null);
|
||||
} else {
|
||||
classNames.add(cls.getName());
|
||||
List classNames = new ArrayList( classes.size() );
|
||||
for( Iterator it = classes.iterator(); it.hasNext(); )
|
||||
{
|
||||
Class cls = ( Class ) it.next();
|
||||
if( cls == null )
|
||||
{
|
||||
classNames.add( null );
|
||||
}
|
||||
else
|
||||
{
|
||||
classNames.add( cls.getName() );
|
||||
}
|
||||
}
|
||||
return classNames;
|
||||
}
|
||||
|
||||
|
||||
// Is assignable
|
||||
// ----------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* <p>Checks if an array of Classes can be assigned to another array of Classes.</p>
|
||||
* <p/>
|
||||
* <p>This method calls {@link #isAssignable(Class, Class) isAssignable} for each Class pair in the input arrays. It
|
||||
* can be used to check if a set of arguments (the first parameter) are suitably compatible with a set of method
|
||||
* parameter types (the second parameter).</p>
|
||||
* <p/>
|
||||
* <p>Unlike the {@link Class#isAssignableFrom(Class)} method, this method takes into account widenings of primitive
|
||||
* classes and <code>null</code>s.</p>
|
||||
* <p/>
|
||||
* <p>Primitive widenings allow an int to be assigned to a <code>long</code>, <code>float</code> or
|
||||
* <code>double</code>. This method returns the correct result for these cases.</p>
|
||||
* <p/>
|
||||
* <p><code>Null</code> may be assigned to any reference type. This method will return <code>true</code> if
|
||||
* <code>null</code> is passed in and the toClass is non-primitive.</p>
|
||||
* <p/>
|
||||
* <p>Specifically, this method tests whether the type represented by the specified <code>Class</code> parameter can
|
||||
* be converted to the type represented by this <code>Class</code> object via an identity conversion widening
|
||||
* primitive or widening reference conversion. See <em><a href="http://java.sun.com/docs/books/jls/">The Java
|
||||
* Language Specification</a></em>, sections 5.1.1, 5.1.2 and 5.1.4 for details.</p>
|
||||
*
|
||||
* <p>This method calls {@link #isAssignable(Class, Class) isAssignable} for each
|
||||
* Class pair in the input arrays. It can be used to check if a set of arguments
|
||||
* (the first parameter) are suitably compatible with a set of method parameter types
|
||||
* (the second parameter).</p>
|
||||
*
|
||||
* <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method, this
|
||||
* method takes into account widenings of primitive classes and
|
||||
* <code>null</code>s.</p>
|
||||
*
|
||||
* <p>Primitive widenings allow an int to be assigned to a <code>long</code>,
|
||||
* <code>float</code> or <code>double</code>. This method returns the correct
|
||||
* result for these cases.</p>
|
||||
*
|
||||
* <p><code>Null</code> may be assigned to any reference type. This method will
|
||||
* return <code>true</code> if <code>null</code> is passed in and the toClass is
|
||||
* non-primitive.</p>
|
||||
*
|
||||
* <p>Specifically, this method tests whether the type represented by the
|
||||
* specified <code>Class</code> parameter can be converted to the type
|
||||
* represented by this <code>Class</code> object via an identity conversion
|
||||
* widening primitive or widening reference conversion. See
|
||||
* <em><a href="http://java.sun.com/docs/books/jls/">The Java Language Specification</a></em>,
|
||||
* sections 5.1.1, 5.1.2 and 5.1.4 for details.</p>
|
||||
*
|
||||
* @param classArray the array of Classes to check, may be <code>null</code>
|
||||
* @param toClassArray the array of Classes to try to assign into, may be <code>null</code>
|
||||
* @param classArray the array of Classes to check, may be <code>null</code>
|
||||
* @param toClassArray the array of Classes to try to assign into, may be <code>null</code>
|
||||
* @return <code>true</code> if assignment possible
|
||||
*/
|
||||
public static boolean isAssignable(Class[] classArray, Class[] toClassArray) {
|
||||
if (ArrayUtils.isSameLength(classArray, toClassArray) == false) {
|
||||
public static boolean isAssignable( Class[] classArray, Class[] toClassArray )
|
||||
{
|
||||
if( ArrayUtils.isSameLength( classArray, toClassArray ) == false )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (classArray == null) {
|
||||
if( classArray == null )
|
||||
{
|
||||
classArray = ArrayUtils.EMPTY_CLASS_ARRAY;
|
||||
}
|
||||
if (toClassArray == null) {
|
||||
if( toClassArray == null )
|
||||
{
|
||||
toClassArray = ArrayUtils.EMPTY_CLASS_ARRAY;
|
||||
}
|
||||
for (int i = 0; i < classArray.length; i++) {
|
||||
if (isAssignable(classArray[i], toClassArray[i]) == false) {
|
||||
for( int i = 0; i < classArray.length; i++ )
|
||||
{
|
||||
if( isAssignable( classArray[i], toClassArray[i] ) == false )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Checks if one <code>Class</code> can be assigned to a variable of
|
||||
* another <code>Class</code>.</p>
|
||||
* <p>Checks if one <code>Class</code> can be assigned to a variable of another <code>Class</code>.</p>
|
||||
* <p/>
|
||||
* <p>Unlike the {@link Class#isAssignableFrom(Class)} method, this method takes into account widenings of primitive
|
||||
* classes and <code>null</code>s.</p>
|
||||
* <p/>
|
||||
* <p>Primitive widenings allow an int to be assigned to a long, float or double. This method returns the correct
|
||||
* result for these cases.</p>
|
||||
* <p/>
|
||||
* <p><code>Null</code> may be assigned to any reference type. This method will return <code>true</code> if
|
||||
* <code>null</code> is passed in and the toClass is non-primitive.</p>
|
||||
* <p/>
|
||||
* <p>Specifically, this method tests whether the type represented by the specified <code>Class</code> parameter can
|
||||
* be converted to the type represented by this <code>Class</code> object via an identity conversion widening
|
||||
* primitive or widening reference conversion. See <em><a href="http://java.sun.com/docs/books/jls/">The Java
|
||||
* Language Specification</a></em>, sections 5.1.1, 5.1.2 and 5.1.4 for details.</p>
|
||||
*
|
||||
* <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method,
|
||||
* this method takes into account widenings of primitive classes and
|
||||
* <code>null</code>s.</p>
|
||||
*
|
||||
* <p>Primitive widenings allow an int to be assigned to a long, float or
|
||||
* double. This method returns the correct result for these cases.</p>
|
||||
*
|
||||
* <p><code>Null</code> may be assigned to any reference type. This method
|
||||
* will return <code>true</code> if <code>null</code> is passed in and the
|
||||
* toClass is non-primitive.</p>
|
||||
*
|
||||
* <p>Specifically, this method tests whether the type represented by the
|
||||
* specified <code>Class</code> parameter can be converted to the type
|
||||
* represented by this <code>Class</code> object via an identity conversion
|
||||
* widening primitive or widening reference conversion. See
|
||||
* <em><a href="http://java.sun.com/docs/books/jls/">The Java Language Specification</a></em>,
|
||||
* sections 5.1.1, 5.1.2 and 5.1.4 for details.</p>
|
||||
*
|
||||
* @param cls the Class to check, may be null
|
||||
* @param toClass the Class to try to assign into, returns false if null
|
||||
* @param cls the Class to check, may be null
|
||||
* @param toClass the Class to try to assign into, returns false if null
|
||||
* @return <code>true</code> if assignment possible
|
||||
*/
|
||||
public static boolean isAssignable(Class cls, Class toClass) {
|
||||
if (toClass == null) {
|
||||
public static boolean isAssignable( Class cls, Class toClass )
|
||||
{
|
||||
if( toClass == null )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
// have to check for null, as isAssignableFrom doesn't
|
||||
if (cls == null) {
|
||||
return !(toClass.isPrimitive());
|
||||
if( cls == null )
|
||||
{
|
||||
return !( toClass.isPrimitive() );
|
||||
}
|
||||
if (cls.equals(toClass)) {
|
||||
if( cls.equals( toClass ) )
|
||||
{
|
||||
return true;
|
||||
}
|
||||
if (cls.isPrimitive()) {
|
||||
if (toClass.isPrimitive() == false) {
|
||||
if( cls.isPrimitive() )
|
||||
{
|
||||
if( toClass.isPrimitive() == false )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (Integer.TYPE.equals(cls)) {
|
||||
return Long.TYPE.equals(toClass)
|
||||
|| Float.TYPE.equals(toClass)
|
||||
|| Double.TYPE.equals(toClass);
|
||||
if( Integer.TYPE.equals( cls ) )
|
||||
{
|
||||
return Long.TYPE.equals( toClass )
|
||||
|| Float.TYPE.equals( toClass )
|
||||
|| Double.TYPE.equals( toClass );
|
||||
}
|
||||
if (Long.TYPE.equals(cls)) {
|
||||
return Float.TYPE.equals(toClass)
|
||||
|| Double.TYPE.equals(toClass);
|
||||
if( Long.TYPE.equals( cls ) )
|
||||
{
|
||||
return Float.TYPE.equals( toClass )
|
||||
|| Double.TYPE.equals( toClass );
|
||||
}
|
||||
if (Boolean.TYPE.equals(cls)) {
|
||||
if( Boolean.TYPE.equals( cls ) )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (Double.TYPE.equals(cls)) {
|
||||
if( Double.TYPE.equals( cls ) )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
if (Float.TYPE.equals(cls)) {
|
||||
return Double.TYPE.equals(toClass);
|
||||
if( Float.TYPE.equals( cls ) )
|
||||
{
|
||||
return Double.TYPE.equals( toClass );
|
||||
}
|
||||
if (Character.TYPE.equals(cls)) {
|
||||
return Integer.TYPE.equals(toClass)
|
||||
|| Long.TYPE.equals(toClass)
|
||||
|| Float.TYPE.equals(toClass)
|
||||
|| Double.TYPE.equals(toClass);
|
||||
if( Character.TYPE.equals( cls ) )
|
||||
{
|
||||
return Integer.TYPE.equals( toClass )
|
||||
|| Long.TYPE.equals( toClass )
|
||||
|| Float.TYPE.equals( toClass )
|
||||
|| Double.TYPE.equals( toClass );
|
||||
}
|
||||
if (Short.TYPE.equals(cls)) {
|
||||
return Integer.TYPE.equals(toClass)
|
||||
|| Long.TYPE.equals(toClass)
|
||||
|| Float.TYPE.equals(toClass)
|
||||
|| Double.TYPE.equals(toClass);
|
||||
if( Short.TYPE.equals( cls ) )
|
||||
{
|
||||
return Integer.TYPE.equals( toClass )
|
||||
|| Long.TYPE.equals( toClass )
|
||||
|| Float.TYPE.equals( toClass )
|
||||
|| Double.TYPE.equals( toClass );
|
||||
}
|
||||
if (Byte.TYPE.equals(cls)) {
|
||||
return Short.TYPE.equals(toClass)
|
||||
|| Integer.TYPE.equals(toClass)
|
||||
|| Long.TYPE.equals(toClass)
|
||||
|| Float.TYPE.equals(toClass)
|
||||
|| Double.TYPE.equals(toClass);
|
||||
if( Byte.TYPE.equals( cls ) )
|
||||
{
|
||||
return Short.TYPE.equals( toClass )
|
||||
|| Integer.TYPE.equals( toClass )
|
||||
|| Long.TYPE.equals( toClass )
|
||||
|| Float.TYPE.equals( toClass )
|
||||
|| Double.TYPE.equals( toClass );
|
||||
}
|
||||
// should never get here
|
||||
return false;
|
||||
}
|
||||
return toClass.isAssignableFrom(cls);
|
||||
return toClass.isAssignableFrom( cls );
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* <p>Converts the specified primitive Class object to its corresponding
|
||||
* wrapper Class object.</p>
|
||||
*
|
||||
* <p>NOTE: From v2.2, this method handles <code>Void.TYPE</code>,
|
||||
* returning <code>Void.TYPE</code>.</p>
|
||||
* <p>Converts the specified primitive Class object to its corresponding wrapper Class object.</p>
|
||||
* <p/>
|
||||
* <p>NOTE: From v2.2, this method handles <code>Void.TYPE</code>, returning <code>Void.TYPE</code>.</p>
|
||||
*
|
||||
* @param cls the class to convert, may be null
|
||||
* @return the wrapper class for <code>cls</code> or <code>cls</code> if
|
||||
* <code>cls</code> is not a primitive. <code>null</code> if null input.
|
||||
* @param cls the class to convert, may be null
|
||||
* @return the wrapper class for <code>cls</code> or <code>cls</code> if <code>cls</code> is not a primitive.
|
||||
* <code>null</code> if null input.
|
||||
* @since 2.1
|
||||
*/
|
||||
public static Class primitiveToWrapper(Class cls) {
|
||||
public static Class primitiveToWrapper( Class cls )
|
||||
{
|
||||
Class convertedClass = cls;
|
||||
if (cls != null && cls.isPrimitive()) {
|
||||
convertedClass = (Class) primitiveWrapperMap.get(cls);
|
||||
}
|
||||
if( cls != null && cls.isPrimitive() )
|
||||
{
|
||||
convertedClass = ( Class ) primitiveWrapperMap.get( cls );
|
||||
}
|
||||
return convertedClass;
|
||||
}
|
||||
|
||||
/**
|
||||
* <p>Converts the specified array of primitive Class objects to an array of
|
||||
* its corresponding wrapper Class objects.</p>
|
||||
* <p>Converts the specified array of primitive Class objects to an array of its corresponding wrapper Class
|
||||
* objects.</p>
|
||||
*
|
||||
* @param classes the class array to convert, may be null or empty
|
||||
* @return an array which contains for each given class, the wrapper class or
|
||||
* the original class if class is not a primitive. <code>null</code> if null input.
|
||||
* Empty array if an empty array passed in.
|
||||
* @param classes the class array to convert, may be null or empty
|
||||
* @return an array which contains for each given class, the wrapper class or the original class if class is not a
|
||||
* primitive. <code>null</code> if null input. Empty array if an empty array passed in.
|
||||
* @since 2.1
|
||||
*/
|
||||
public static Class[] primitivesToWrappers(Class[] classes) {
|
||||
if (classes == null) {
|
||||
public static Class[] primitivesToWrappers( Class[] classes )
|
||||
{
|
||||
if( classes == null )
|
||||
{
|
||||
return null;
|
||||
}
|
||||
|
||||
if (classes.length == 0) {
|
||||
if( classes.length == 0 )
|
||||
{
|
||||
return classes;
|
||||
}
|
||||
|
||||
Class[] convertedClasses = new Class[classes.length];
|
||||
for (int i=0; i < classes.length; i++) {
|
||||
for( int i = 0; i < classes.length; i++ )
|
||||
{
|
||||
convertedClasses[i] = primitiveToWrapper( classes[i] );
|
||||
}
|
||||
return convertedClasses;
|
||||
|
|
@ -489,18 +551,120 @@ public class ClassUtils {
|
|||
|
||||
// Inner class
|
||||
// ----------------------------------------------------------------------
|
||||
|
||||
/**
|
||||
* <p>Is the specified class an inner class or static nested class.</p>
|
||||
*
|
||||
* @param cls the class to check, may be null
|
||||
* @return <code>true</code> if the class is an inner or static nested class,
|
||||
* false if not or <code>null</code>
|
||||
*
|
||||
* @param cls the class to check, may be null
|
||||
* @return <code>true</code> if the class is an inner or static nested class, false if not or <code>null</code>
|
||||
*/
|
||||
public static boolean isInnerClass(Class cls) {
|
||||
if (cls == null) {
|
||||
public static boolean isInnerClass( Class cls )
|
||||
{
|
||||
if( cls == null )
|
||||
{
|
||||
return false;
|
||||
}
|
||||
return cls.getName().indexOf(INNER_CLASS_SEPARATOR_CHAR) >= 0;
|
||||
return cls.getName().indexOf( INNER_CLASS_SEPARATOR_CHAR ) >= 0;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the class represented by <code>className</code> using the <code>classLoader</code>. This implementation
|
||||
* supports names like "<code>java.lang.String[]</code>" as well as "<code>[Ljava.lang.String;</code>".
|
||||
*
|
||||
* @param classLoader the class loader to use to load the class
|
||||
* @param className the class name
|
||||
* @param initialize whether the class must be initialized
|
||||
* @return the class represented by <code>className</code> using the <code>classLoader</code>
|
||||
* @throws ClassNotFoundException if the class is not found
|
||||
*/
|
||||
public static Class getClass( ClassLoader classLoader, String className, boolean initialize )
|
||||
throws ClassNotFoundException
|
||||
{
|
||||
Class clazz;
|
||||
if( abbreviationMap.containsKey( className ) )
|
||||
{
|
||||
clazz = Class.forName( "[" + abbreviationMap.get( className ), initialize, classLoader ).getComponentType();
|
||||
}
|
||||
else
|
||||
{
|
||||
clazz = Class.forName( toProperClassName( className ), initialize, classLoader );
|
||||
}
|
||||
return clazz;
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the (initialized) class represented by <code>className</code> using the <code>classLoader</code>. This
|
||||
* implementation supports names like "<code>java.lang.String[]</code>" as well as
|
||||
* "<code>[Ljava.lang.String;</code>".
|
||||
*
|
||||
* @param classLoader the class loader to use to load the class
|
||||
* @param className the class name
|
||||
* @return the class represented by <code>className</code> using the <code>classLoader</code>
|
||||
* @throws ClassNotFoundException if the class is not found
|
||||
*/
|
||||
public static Class getClass( ClassLoader classLoader, String className ) throws ClassNotFoundException
|
||||
{
|
||||
return getClass( classLoader, className, true );
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the (initialized )class represented by <code>className</code> using the current thread's context class
|
||||
* loader. This implementation supports names like "<code>java.lang.String[]</code>" as well as
|
||||
* "<code>[Ljava.lang.String;</code>".
|
||||
*
|
||||
* @param className the class name
|
||||
* @return the class represented by <code>className</code> using the current thread's context class loader
|
||||
* @throws ClassNotFoundException if the class is not found
|
||||
*/
|
||||
public static Class getClass( String className ) throws ClassNotFoundException
|
||||
{
|
||||
return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() :
|
||||
Thread.currentThread().getContextClassLoader(), className, true );
|
||||
}
|
||||
|
||||
/**
|
||||
* Returns the class represented by <code>className</code> using the current thread's context class loader. This
|
||||
* implementation supports names like "<code>java.lang.String[]</code>" as well as
|
||||
* "<code>[Ljava.lang.String;</code>".
|
||||
*
|
||||
* @param className the class name
|
||||
* @param initialize whether the class must be initialized
|
||||
* @return the class represented by <code>className</code> using the current thread's context class loader
|
||||
* @throws ClassNotFoundException if the class is not found
|
||||
*/
|
||||
public static Class getClass( String className, boolean initialize ) throws ClassNotFoundException
|
||||
{
|
||||
return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() :
|
||||
Thread.currentThread().getContextClassLoader(), className, initialize );
|
||||
}
|
||||
|
||||
private static String toProperClassName( String className )
|
||||
{
|
||||
className = StringUtils.deleteWhitespace( className );
|
||||
if( className == null )
|
||||
{
|
||||
throw new NullArgumentException( "className" );
|
||||
}
|
||||
else if( className.endsWith( "[]" ) )
|
||||
{
|
||||
final StringBuffer classNameBuffer = new StringBuffer();
|
||||
while( className.endsWith( "[]" ) )
|
||||
{
|
||||
className = className.substring( 0, className.length() - 2 );
|
||||
classNameBuffer.append( "[" );
|
||||
}
|
||||
final String abbreviation = ( String ) abbreviationMap.get( className );
|
||||
if( abbreviation != null )
|
||||
{
|
||||
classNameBuffer.append( abbreviation );
|
||||
}
|
||||
else
|
||||
{
|
||||
classNameBuffer.append( "L" ).append( className ).append( ";" );
|
||||
}
|
||||
className = classNameBuffer.toString();
|
||||
|
||||
}
|
||||
return className;
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -392,6 +392,110 @@ public class ClassUtilsTest extends TestCase {
|
|||
assertNotSame("unmodified", noPrimitives, ClassUtils.primitivesToWrappers(noPrimitives));
|
||||
}
|
||||
|
||||
public void testGetClassClassNotFound() throws Exception {
|
||||
assertGetClassThrowsClassNotFound( "bool" );
|
||||
assertGetClassThrowsClassNotFound( "bool[]" );
|
||||
assertGetClassThrowsClassNotFound( "integer[]" );
|
||||
}
|
||||
|
||||
public void testGetClassInvalidArguments() throws Exception {
|
||||
assertGetClassThrowsIllegalArgument( null );
|
||||
assertGetClassThrowsClassNotFound( "[][][]" );
|
||||
assertGetClassThrowsClassNotFound( "[[]" );
|
||||
assertGetClassThrowsClassNotFound( "[" );
|
||||
assertGetClassThrowsClassNotFound( "java.lang.String][" );
|
||||
assertGetClassThrowsClassNotFound( ".hello.world" );
|
||||
assertGetClassThrowsClassNotFound( "hello..world" );
|
||||
}
|
||||
|
||||
public void testWithInterleavingWhitespace() throws ClassNotFoundException {
|
||||
assertEquals( int[].class, ClassUtils.getClass( " int [ ] " ) );
|
||||
assertEquals( long[].class, ClassUtils.getClass( "\rlong\t[\n]\r" ) );
|
||||
assertEquals( short[].class, ClassUtils.getClass( "\tshort \t\t[]" ) );
|
||||
assertEquals( byte[].class, ClassUtils.getClass( "byte[\t\t\n\r] " ) );
|
||||
}
|
||||
|
||||
public void testGetClassByNormalNameArrays() throws ClassNotFoundException {
|
||||
assertEquals( int[].class, ClassUtils.getClass( "int[]" ) );
|
||||
assertEquals( long[].class, ClassUtils.getClass( "long[]" ) );
|
||||
assertEquals( short[].class, ClassUtils.getClass( "short[]" ) );
|
||||
assertEquals( byte[].class, ClassUtils.getClass( "byte[]" ) );
|
||||
assertEquals( char[].class, ClassUtils.getClass( "char[]" ) );
|
||||
assertEquals( float[].class, ClassUtils.getClass( "float[]" ) );
|
||||
assertEquals( double[].class, ClassUtils.getClass( "double[]" ) );
|
||||
assertEquals( boolean[].class, ClassUtils.getClass( "boolean[]" ) );
|
||||
assertEquals( String[].class, ClassUtils.getClass( "java.lang.String[]" ) );
|
||||
}
|
||||
|
||||
public void testGetClassByNormalNameArrays2D() throws ClassNotFoundException {
|
||||
assertEquals( int[][].class, ClassUtils.getClass( "int[][]" ) );
|
||||
assertEquals( long[][].class, ClassUtils.getClass( "long[][]" ) );
|
||||
assertEquals( short[][].class, ClassUtils.getClass( "short[][]" ) );
|
||||
assertEquals( byte[][].class, ClassUtils.getClass( "byte[][]" ) );
|
||||
assertEquals( char[][].class, ClassUtils.getClass( "char[][]" ) );
|
||||
assertEquals( float[][].class, ClassUtils.getClass( "float[][]" ) );
|
||||
assertEquals( double[][].class, ClassUtils.getClass( "double[][]" ) );
|
||||
assertEquals( boolean[][].class, ClassUtils.getClass( "boolean[][]" ) );
|
||||
assertEquals( String[][].class, ClassUtils.getClass( "java.lang.String[][]" ) );
|
||||
}
|
||||
|
||||
public void testGetClassWithArrayClasses2D() throws Exception {
|
||||
assertGetClassReturnsClass( String[][].class );
|
||||
assertGetClassReturnsClass( int[][].class );
|
||||
assertGetClassReturnsClass( long[][].class );
|
||||
assertGetClassReturnsClass( short[][].class );
|
||||
assertGetClassReturnsClass( byte[][].class );
|
||||
assertGetClassReturnsClass( char[][].class );
|
||||
assertGetClassReturnsClass( float[][].class );
|
||||
assertGetClassReturnsClass( double[][].class );
|
||||
assertGetClassReturnsClass( boolean[][].class );
|
||||
}
|
||||
|
||||
public void testGetClassWithArrayClasses() throws Exception {
|
||||
assertGetClassReturnsClass( String[].class );
|
||||
assertGetClassReturnsClass( int[].class );
|
||||
assertGetClassReturnsClass( long[].class );
|
||||
assertGetClassReturnsClass( short[].class );
|
||||
assertGetClassReturnsClass( byte[].class );
|
||||
assertGetClassReturnsClass( char[].class );
|
||||
assertGetClassReturnsClass( float[].class );
|
||||
assertGetClassReturnsClass( double[].class );
|
||||
assertGetClassReturnsClass( boolean[].class );
|
||||
}
|
||||
|
||||
public void testGetClassRawPrimitives() throws ClassNotFoundException {
|
||||
assertEquals( int.class, ClassUtils.getClass( "int" ) );
|
||||
assertEquals( long.class, ClassUtils.getClass( "long" ) );
|
||||
assertEquals( short.class, ClassUtils.getClass( "short" ) );
|
||||
assertEquals( byte.class, ClassUtils.getClass( "byte" ) );
|
||||
assertEquals( char.class, ClassUtils.getClass( "char" ) );
|
||||
assertEquals( float.class, ClassUtils.getClass( "float" ) );
|
||||
assertEquals( double.class, ClassUtils.getClass( "double" ) );
|
||||
assertEquals( boolean.class, ClassUtils.getClass( "boolean" ) );
|
||||
}
|
||||
|
||||
private void assertGetClassReturnsClass( Class c ) throws Exception {
|
||||
assertEquals( c, ClassUtils.getClass( c.getName() ) );
|
||||
}
|
||||
|
||||
private void assertGetClassThrowsException( String className, Class exceptionType ) throws Exception {
|
||||
try {
|
||||
ClassUtils.getClass( className );
|
||||
fail( "ClassUtils.getClass() should fail with an exception of type " + exceptionType.getName() + " when given class name \"" + className + "\"." );
|
||||
}
|
||||
catch( Exception e ) {
|
||||
assertTrue( exceptionType.isAssignableFrom( e.getClass() ) );
|
||||
}
|
||||
}
|
||||
|
||||
private void assertGetClassThrowsIllegalArgument( String className ) throws Exception {
|
||||
assertGetClassThrowsException( className, IllegalArgumentException.class );
|
||||
}
|
||||
|
||||
private void assertGetClassThrowsClassNotFound( String className ) throws Exception {
|
||||
assertGetClassThrowsException( className, ClassNotFoundException.class );
|
||||
}
|
||||
|
||||
/**
|
||||
* Creates a new instance of URLClassLoader with the system class loader's URLs and a <code>null</code> parent
|
||||
* class loader.
|
||||
|
|
|
|||
Loading…
Reference in New Issue