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Fixed formatting. 

git-svn-id: https://svn.apache.org/repos/asf/jakarta/commons/proper/lang/trunk@357616 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
James W. Carman 2005-12-19 02:30:58 +00:00
parent 336c2631c4
commit 72c7bbe974
1 changed files with 258 additions and 319 deletions
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577
src/java/org/apache/commons/lang/ClassUtils.java
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@ -23,60 +23,60 @@ import java.util.Map;
/** /**
* <p>Operates on classes without using reflection.</p> * <p>Operates on classes without using reflection.</p>
* <p/> *
* <p>This class handles invalid <code>null</code> inputs as best it can. Each method documents its behaviour in more * <p>This class handles invalid <code>null</code> inputs as best it can.
* detail.</p> * Each method documents its behaviour in more detail.</p>
* *
* @author Stephen Colebourne * @author Stephen Colebourne
* @author Gary Gregory * @author Gary Gregory
* @author Norm Deane * @author Norm Deane
* @author Alban Peignier * @author Alban Peignier
* @version $Id$
* @since 2.0 * @since 2.0
* @version $Id$
*/ */
public class ClassUtils public class ClassUtils {
{
/** /**
* <p>The package separator character: <code>'&#x2e;' == {@value}</code>.</p> * <p>The package separator character: <code>'&#x2e;' == {@value}</code>.</p>
*/ */
public static final char PACKAGE_SEPARATOR_CHAR = '.'; public static final char PACKAGE_SEPARATOR_CHAR = '.';
/** /**
* <p>The package separator String: <code>"&#x2e;"</code>.</p> * <p>The package separator String: <code>"&#x2e;"</code>.</p>
*/ */
public static final String PACKAGE_SEPARATOR = String.valueOf( PACKAGE_SEPARATOR_CHAR ); public static final String PACKAGE_SEPARATOR = String.valueOf(PACKAGE_SEPARATOR_CHAR);
/** /**
* <p>The inner class separator character: <code>'$' == {@value}</code>.</p> * <p>The inner class separator character: <code>'$' == {@value}</code>.</p>
*/ */
public static final char INNER_CLASS_SEPARATOR_CHAR = '$'; public static final char INNER_CLASS_SEPARATOR_CHAR = '$';
/** /**
* <p>The inner class separator String: <code>"$"</code>.</p> * <p>The inner class separator String: <code>"$"</code>.</p>
*/ */
public static final String INNER_CLASS_SEPARATOR = String.valueOf( INNER_CLASS_SEPARATOR_CHAR ); public static final String INNER_CLASS_SEPARATOR = String.valueOf(INNER_CLASS_SEPARATOR_CHAR);
/** /**
* Maps primitive <code>Class</code>es to their corresponding wrapper <code>Class</code>. * Maps primitive <code>Class</code>es to their corresponding wrapper <code>Class</code>.
*/ */
private static Map primitiveWrapperMap = new HashMap(); private static Map primitiveWrapperMap = new HashMap();
static {
static primitiveWrapperMap.put(Boolean.TYPE, Boolean.class);
{ primitiveWrapperMap.put(Byte.TYPE, Byte.class);
primitiveWrapperMap.put( Boolean.TYPE, Boolean.class ); primitiveWrapperMap.put(Character.TYPE, Character.class);
primitiveWrapperMap.put( Byte.TYPE, Byte.class ); primitiveWrapperMap.put(Short.TYPE, Short.class);
primitiveWrapperMap.put( Character.TYPE, Character.class ); primitiveWrapperMap.put(Integer.TYPE, Integer.class);
primitiveWrapperMap.put( Short.TYPE, Short.class ); primitiveWrapperMap.put(Long.TYPE, Long.class);
primitiveWrapperMap.put( Integer.TYPE, Integer.class ); primitiveWrapperMap.put(Double.TYPE, Double.class);
primitiveWrapperMap.put( Long.TYPE, Long.class ); primitiveWrapperMap.put(Float.TYPE, Float.class);
primitiveWrapperMap.put( Double.TYPE, Double.class ); primitiveWrapperMap.put(Void.TYPE, Void.TYPE);
primitiveWrapperMap.put( Float.TYPE, Float.class );
primitiveWrapperMap.put( Void.TYPE, Void.TYPE );
} }
/** /**
* Maps a primitive class name to its corresponding abbreviation used in array class names. * Maps a primitive class name to its corresponding abbreviation used in array class names.
*/ */
private static Map abbreviationMap = new HashMap(); private static Map abbreviationMap = new HashMap();
static {
static
{
abbreviationMap.put( "int", "I" ); abbreviationMap.put( "int", "I" );
abbreviationMap.put( "boolean", "Z" ); abbreviationMap.put( "boolean", "Z" );
abbreviationMap.put( "float", "F" ); abbreviationMap.put( "float", "F" );
@ -88,199 +88,173 @@ public class ClassUtils
} }
/** /**
* <p>ClassUtils instances should NOT be constructed in standard programming. Instead, the class should be used as * <p>ClassUtils instances should NOT be constructed in standard programming.
* Instead, the class should be used as
* <code>ClassUtils.getShortClassName(cls)</code>.</p> * <code>ClassUtils.getShortClassName(cls)</code>.</p>
* <p/> *
* <p>This constructor is public to permit tools that require a JavaBean instance to operate.</p> * <p>This constructor is public to permit tools that require a JavaBean
* instance to operate.</p>
*/ */
public ClassUtils() public ClassUtils() {
{ super();
super();
} }
// Short class name // Short class name
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Gets the class name minus the package name for an <code>Object</code>.</p> * <p>Gets the class name minus the package name for an <code>Object</code>.</p>
* *
* @param object the class to get the short name for, may be null * @param object the class to get the short name for, may be null
* @param valueIfNull the value to return if null * @param valueIfNull the value to return if null
* @return the class name of the object without the package name, or the null value * @return the class name of the object without the package name, or the null value
*/ */
public static String getShortClassName( Object object, String valueIfNull ) public static String getShortClassName(Object object, String valueIfNull) {
{ if (object == null) {
if( object == null )
{
return valueIfNull; return valueIfNull;
} }
return getShortClassName( object.getClass().getName() ); return getShortClassName(object.getClass().getName());
} }
/** /**
* <p>Gets the class name minus the package name from a <code>Class</code>.</p> * <p>Gets the class name minus the package name from a <code>Class</code>.</p>
* *
* @param cls the class to get the short name for. * @param cls the class to get the short name for.
* @return the class name without the package name or an empty string * @return the class name without the package name or an empty string
*/ */
public static String getShortClassName( Class cls ) public static String getShortClassName(Class cls) {
{ if (cls == null) {
if( cls == null )
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
return getShortClassName( cls.getName() ); return getShortClassName(cls.getName());
} }
/** /**
* <p>Gets the class name minus the package name from a String.</p> * <p>Gets the class name minus the package name from a String.</p>
* <p/> *
* <p>The string passed in is assumed to be a class name - it is not checked.</p> * <p>The string passed in is assumed to be a class name - it is not checked.</p>
* *
* @param className the className to get the short name for * @param className the className to get the short name for
* @return the class name of the class without the package name or an empty string * @return the class name of the class without the package name or an empty string
*/ */
public static String getShortClassName( String className ) public static String getShortClassName(String className) {
{ if (className == null) {
if( className == null )
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
if( className.length() == 0 ) if (className.length() == 0) {
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
char[] chars = className.toCharArray(); char[] chars = className.toCharArray();
int lastDot = 0; int lastDot = 0;
for( int i = 0; i < chars.length; i++ ) for (int i = 0; i < chars.length; i++) {
{ if (chars[i] == PACKAGE_SEPARATOR_CHAR) {
if( chars[i] == PACKAGE_SEPARATOR_CHAR )
{
lastDot = i + 1; lastDot = i + 1;
} } else if (chars[i] == INNER_CLASS_SEPARATOR_CHAR) { // handle inner classes
else if( chars[i] == INNER_CLASS_SEPARATOR_CHAR )
{ // handle inner classes
chars[i] = PACKAGE_SEPARATOR_CHAR; chars[i] = PACKAGE_SEPARATOR_CHAR;
} }
} }
return new String( chars, lastDot, chars.length - lastDot ); return new String(chars, lastDot, chars.length - lastDot);
} }
// Package name // Package name
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Gets the package name of an <code>Object</code>.</p> * <p>Gets the package name of an <code>Object</code>.</p>
* *
* @param object the class to get the package name for, may be null * @param object the class to get the package name for, may be null
* @param valueIfNull the value to return if null * @param valueIfNull the value to return if null
* @return the package name of the object, or the null value * @return the package name of the object, or the null value
*/ */
public static String getPackageName( Object object, String valueIfNull ) public static String getPackageName(Object object, String valueIfNull) {
{ if (object == null) {
if( object == null )
{
return valueIfNull; return valueIfNull;
} }
return getPackageName( object.getClass().getName() ); return getPackageName(object.getClass().getName());
} }
/** /**
* <p>Gets the package name of a <code>Class</code>.</p> * <p>Gets the package name of a <code>Class</code>.</p>
* *
* @param cls the class to get the package name for, may be <code>null</code>. * @param cls the class to get the package name for, may be <code>null</code>.
* @return the package name or an empty string * @return the package name or an empty string
*/ */
public static String getPackageName( Class cls ) public static String getPackageName(Class cls) {
{ if (cls == null) {
if( cls == null )
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
return getPackageName( cls.getName() ); return getPackageName(cls.getName());
} }
/** /**
* <p>Gets the package name from a <code>String</code>.</p> * <p>Gets the package name from a <code>String</code>.</p>
* <p/>
* <p>The string passed in is assumed to be a class name - it is not checked.</p> <p>If the class is unpackaged,
* return an empty string.</p>
* *
* @param className the className to get the package name for, may be <code>null</code> * <p>The string passed in is assumed to be a class name - it is not checked.</p>
* <p>If the class is unpackaged, return an empty string.</p>
*
* @param className the className to get the package name for, may be <code>null</code>
* @return the package name or an empty string * @return the package name or an empty string
*/ */
public static String getPackageName( String className ) public static String getPackageName(String className) {
{ if (className == null) {
if( className == null )
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
int i = className.lastIndexOf( PACKAGE_SEPARATOR_CHAR ); int i = className.lastIndexOf(PACKAGE_SEPARATOR_CHAR);
if( i == -1 ) if (i == -1) {
{
return StringUtils.EMPTY; return StringUtils.EMPTY;
} }
return className.substring( 0, i ); return className.substring(0, i);
} }
// Superclasses/Superinterfaces // Superclasses/Superinterfaces
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Gets a <code>List</code> of superclasses for the given class.</p> * <p>Gets a <code>List</code> of superclasses for the given class.</p>
* *
* @param cls the class to look up, may be <code>null</code> * @param cls the class to look up, may be <code>null</code>
* @return the <code>List</code> of superclasses in order going up from this one <code>null</code> if null input * @return the <code>List</code> of superclasses in order going up from this one
* <code>null</code> if null input
*/ */
public static List getAllSuperclasses( Class cls ) public static List getAllSuperclasses(Class cls) {
{ if (cls == null) {
if( cls == null )
{
return null; return null;
} }
List classes = new ArrayList(); List classes = new ArrayList();
Class superclass = cls.getSuperclass(); Class superclass = cls.getSuperclass();
while( superclass != null ) while (superclass != null) {
{ classes.add(superclass);
classes.add( superclass );
superclass = superclass.getSuperclass(); superclass = superclass.getSuperclass();
} }
return classes; return classes;
} }
/** /**
* <p>Gets a <code>List</code> of all interfaces implemented by the given class and its superclasses.</p> * <p>Gets a <code>List</code> of all interfaces implemented by the given
* <p/> * class and its superclasses.</p>
* <p>The order is determined by looking through each interface in turn as declared in the source file and following
* its hierarchy up. Then each superclass is considered in the same way. Later duplicates are ignored, so the order
* is maintained.</p>
* *
* @param cls the class to look up, may be <code>null</code> * <p>The order is determined by looking through each interface in turn as
* @return the <code>List</code> of interfaces in order, <code>null</code> if null input * declared in the source file and following its hierarchy up. Then each
* superclass is considered in the same way. Later duplicates are ignored,
* so the order is maintained.</p>
*
* @param cls the class to look up, may be <code>null</code>
* @return the <code>List</code> of interfaces in order,
* <code>null</code> if null input
*/ */
public static List getAllInterfaces( Class cls ) public static List getAllInterfaces(Class cls) {
{ if (cls == null) {
if( cls == null )
{
return null; return null;
} }
List list = new ArrayList(); List list = new ArrayList();
while( cls != null ) while (cls != null) {
{
Class[] interfaces = cls.getInterfaces(); Class[] interfaces = cls.getInterfaces();
for( int i = 0; i < interfaces.length; i++ ) for (int i = 0; i < interfaces.length; i++) {
{ if (list.contains(interfaces[i]) == false) {
if( list.contains( interfaces[i] ) == false ) list.add(interfaces[i]);
{
list.add( interfaces[i] );
} }
List superInterfaces = getAllInterfaces( interfaces[i] ); List superInterfaces = getAllInterfaces(interfaces[i]);
for( Iterator it = superInterfaces.iterator(); it.hasNext(); ) for (Iterator it = superInterfaces.iterator(); it.hasNext();) {
{ Class intface = (Class) it.next();
Class intface = ( Class ) it.next(); if (list.contains(intface) == false) {
if( list.contains( intface ) == false ) list.add(intface);
{
list.add( intface );
} }
} }
} }
@ -291,67 +265,57 @@ public class ClassUtils
// Convert list // Convert list
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Given a <code>List</code> of class names, this method converts them into classes.</p> * <p>Given a <code>List</code> of class names, this method converts them into classes.</p>
* <p/>
* <p>A new <code>List</code> is returned. If the class name cannot be found, <code>null</code> is stored in the
* <code>List</code>. If the class name in the <code>List</code> is <code>null</code>, <code>null</code> is stored
* in the output <code>List</code>.</p>
* *
* @param classNames the classNames to change * <p>A new <code>List</code> is returned. If the class name cannot be found, <code>null</code>
* @return a <code>List</code> of Class objects corresponding to the class names, <code>null</code> if null input * is stored in the <code>List</code>. If the class name in the <code>List</code> is
* <code>null</code>, <code>null</code> is stored in the output <code>List</code>.</p>
*
* @param classNames the classNames to change
* @return a <code>List</code> of Class objects corresponding to the class names,
* <code>null</code> if null input
* @throws ClassCastException if classNames contains a non String entry * @throws ClassCastException if classNames contains a non String entry
*/ */
public static List convertClassNamesToClasses( List classNames ) public static List convertClassNamesToClasses(List classNames) {
{ if (classNames == null) {
if( classNames == null )
{
return null; return null;
} }
List classes = new ArrayList( classNames.size() ); List classes = new ArrayList(classNames.size());
for( Iterator it = classNames.iterator(); it.hasNext(); ) for (Iterator it = classNames.iterator(); it.hasNext();) {
{ String className = (String) it.next();
String className = ( String ) it.next(); try {
try classes.add(Class.forName(className));
{ } catch (Exception ex) {
classes.add( Class.forName( className ) ); classes.add(null);
}
catch( Exception ex )
{
classes.add( null );
} }
} }
return classes; return classes;
} }
/** /**
* <p>Given a <code>List</code> of <code>Class</code> objects, this method converts them into class names.</p> * <p>Given a <code>List</code> of <code>Class</code> objects, this method converts
* <p/> * them into class names.</p>
* <p>A new <code>List</code> is returned. <code>null</code> objects will be copied into the returned list as
* <code>null</code>.</p>
* *
* @param classes the classes to change * <p>A new <code>List</code> is returned. <code>null</code> objects will be copied into
* @return a <code>List</code> of class names corresponding to the Class objects, <code>null</code> if null input * the returned list as <code>null</code>.</p>
*
* @param classes the classes to change
* @return a <code>List</code> of class names corresponding to the Class objects,
* <code>null</code> if null input
* @throws ClassCastException if <code>classes</code> contains a non-<code>Class</code> entry * @throws ClassCastException if <code>classes</code> contains a non-<code>Class</code> entry
*/ */
public static List convertClassesToClassNames( List classes ) public static List convertClassesToClassNames(List classes) {
{ if (classes == null) {
if( classes == null )
{
return null; return null;
} }
List classNames = new ArrayList( classes.size() ); List classNames = new ArrayList(classes.size());
for( Iterator it = classes.iterator(); it.hasNext(); ) for (Iterator it = classes.iterator(); it.hasNext();) {
{ Class cls = (Class) it.next();
Class cls = ( Class ) it.next(); if (cls == null) {
if( cls == null ) classNames.add(null);
{ } else {
classNames.add( null ); classNames.add(cls.getName());
}
else
{
classNames.add( cls.getName() );
} }
} }
return classNames; return classNames;
@ -359,50 +323,49 @@ public class ClassUtils
// Is assignable // Is assignable
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Checks if an array of Classes can be assigned to another array of Classes.</p> * <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>
* *
* @param classArray the array of Classes to check, may be <code>null</code> * <p>This method calls {@link #isAssignable(Class, Class) isAssignable} for each
* @param toClassArray the array of Classes to try to assign into, may be <code>null</code> * 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>
* @return <code>true</code> if assignment possible * @return <code>true</code> if assignment possible
*/ */
public static boolean isAssignable( Class[] classArray, Class[] toClassArray ) public static boolean isAssignable(Class[] classArray, Class[] toClassArray) {
{ if (ArrayUtils.isSameLength(classArray, toClassArray) == false) {
if( ArrayUtils.isSameLength( classArray, toClassArray ) == false )
{
return false; return false;
} }
if( classArray == null ) if (classArray == null) {
{
classArray = ArrayUtils.EMPTY_CLASS_ARRAY; classArray = ArrayUtils.EMPTY_CLASS_ARRAY;
} }
if( toClassArray == null ) if (toClassArray == null) {
{
toClassArray = ArrayUtils.EMPTY_CLASS_ARRAY; toClassArray = ArrayUtils.EMPTY_CLASS_ARRAY;
} }
for( int i = 0; i < classArray.length; i++ ) for (int i = 0; i < classArray.length; i++) {
{ if (isAssignable(classArray[i], toClassArray[i]) == false) {
if( isAssignable( classArray[i], toClassArray[i] ) == false )
{
return false; return false;
} }
} }
@ -410,140 +373,130 @@ public class ClassUtils
} }
/** /**
* <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
* <p/> * another <code>Class</code>.</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>
* *
* @param cls the Class to check, may be null * <p>Unlike the {@link Class#isAssignableFrom(java.lang.Class)} method,
* @param toClass the Class to try to assign into, returns false if null * 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
* @return <code>true</code> if assignment possible * @return <code>true</code> if assignment possible
*/ */
public static boolean isAssignable( Class cls, Class toClass ) public static boolean isAssignable(Class cls, Class toClass) {
{ if (toClass == null) {
if( toClass == null )
{
return false; return false;
} }
// have to check for null, as isAssignableFrom doesn't // have to check for null, as isAssignableFrom doesn't
if( cls == null ) if (cls == null) {
{ return !(toClass.isPrimitive());
return !( toClass.isPrimitive() );
} }
if( cls.equals( toClass ) ) if (cls.equals(toClass)) {
{
return true; return true;
} }
if( cls.isPrimitive() ) if (cls.isPrimitive()) {
{ if (toClass.isPrimitive() == false) {
if( toClass.isPrimitive() == false )
{
return false; return false;
} }
if( Integer.TYPE.equals( cls ) ) if (Integer.TYPE.equals(cls)) {
{ return Long.TYPE.equals(toClass)
return Long.TYPE.equals( toClass ) || Float.TYPE.equals(toClass)
|| Float.TYPE.equals( toClass ) || Double.TYPE.equals(toClass);
|| Double.TYPE.equals( toClass );
} }
if( Long.TYPE.equals( cls ) ) if (Long.TYPE.equals(cls)) {
{ return Float.TYPE.equals(toClass)
return Float.TYPE.equals( toClass ) || Double.TYPE.equals(toClass);
|| Double.TYPE.equals( toClass );
} }
if( Boolean.TYPE.equals( cls ) ) if (Boolean.TYPE.equals(cls)) {
{
return false; return false;
} }
if( Double.TYPE.equals( cls ) ) if (Double.TYPE.equals(cls)) {
{
return false; return false;
} }
if( Float.TYPE.equals( cls ) ) if (Float.TYPE.equals(cls)) {
{ return Double.TYPE.equals(toClass);
return Double.TYPE.equals( toClass );
} }
if( Character.TYPE.equals( cls ) ) if (Character.TYPE.equals(cls)) {
{ return Integer.TYPE.equals(toClass)
return Integer.TYPE.equals( toClass ) || Long.TYPE.equals(toClass)
|| Long.TYPE.equals( toClass ) || Float.TYPE.equals(toClass)
|| Float.TYPE.equals( toClass ) || Double.TYPE.equals(toClass);
|| Double.TYPE.equals( toClass );
} }
if( Short.TYPE.equals( cls ) ) if (Short.TYPE.equals(cls)) {
{ return Integer.TYPE.equals(toClass)
return Integer.TYPE.equals( toClass ) || Long.TYPE.equals(toClass)
|| Long.TYPE.equals( toClass ) || Float.TYPE.equals(toClass)
|| Float.TYPE.equals( toClass ) || Double.TYPE.equals(toClass);
|| Double.TYPE.equals( toClass );
} }
if( Byte.TYPE.equals( cls ) ) if (Byte.TYPE.equals(cls)) {
{ return Short.TYPE.equals(toClass)
return Short.TYPE.equals( toClass ) || Integer.TYPE.equals(toClass)
|| Integer.TYPE.equals( toClass ) || Long.TYPE.equals(toClass)
|| Long.TYPE.equals( toClass ) || Float.TYPE.equals(toClass)
|| Float.TYPE.equals( toClass ) || Double.TYPE.equals(toClass);
|| Double.TYPE.equals( toClass );
} }
// should never get here // should never get here
return false; 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>Converts the specified primitive Class object to its corresponding
* <p/> * wrapper Class object.</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 * <p>NOTE: From v2.2, this method handles <code>Void.TYPE</code>,
* @return the wrapper class for <code>cls</code> or <code>cls</code> if <code>cls</code> is not a primitive. * returning <code>Void.TYPE</code>.</p>
* <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 * @since 2.1
*/ */
public static Class primitiveToWrapper( Class cls ) public static Class primitiveToWrapper(Class cls) {
{
Class convertedClass = cls; Class convertedClass = cls;
if( cls != null && cls.isPrimitive() ) if (cls != null && cls.isPrimitive()) {
{ convertedClass = (Class) primitiveWrapperMap.get(cls);
convertedClass = ( Class ) primitiveWrapperMap.get( cls );
} }
return convertedClass; return convertedClass;
} }
/** /**
* <p>Converts the specified array of primitive Class objects to an array of its corresponding wrapper Class * <p>Converts the specified array of primitive Class objects to an array of
* objects.</p> * its corresponding wrapper Class objects.</p>
* *
* @param classes the class array to convert, may be null or empty * @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 * @return an array which contains for each given class, the wrapper class or
* primitive. <code>null</code> if null input. Empty array if an empty array passed in. * 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 * @since 2.1
*/ */
public static Class[] primitivesToWrappers( Class[] classes ) public static Class[] primitivesToWrappers(Class[] classes) {
{ if (classes == null) {
if( classes == null )
{
return null; return null;
} }
if( classes.length == 0 )
{ if (classes.length == 0) {
return classes; return classes;
} }
Class[] convertedClasses = new Class[classes.length]; 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] ); convertedClasses[i] = primitiveToWrapper( classes[i] );
} }
return convertedClasses; return convertedClasses;
@ -551,20 +504,18 @@ public class ClassUtils
// Inner class // Inner class
// ---------------------------------------------------------------------- // ----------------------------------------------------------------------
/** /**
* <p>Is the specified class an inner class or static nested class.</p> * <p>Is the specified class an inner class or static nested class.</p>
* *
* @param cls the class to check, may be null * @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> * @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 ) public static boolean isInnerClass(Class cls) {
{ if (cls == null) {
if( cls == null )
{
return false; return false;
} }
return cls.getName().indexOf( INNER_CLASS_SEPARATOR_CHAR ) >= 0; return cls.getName().indexOf(INNER_CLASS_SEPARATOR_CHAR) >= 0;
} }
/** /**
@ -578,15 +529,12 @@ public class ClassUtils
* @throws ClassNotFoundException if the class is not found * @throws ClassNotFoundException if the class is not found
*/ */
public static Class getClass( ClassLoader classLoader, String className, boolean initialize ) public static Class getClass( ClassLoader classLoader, String className, boolean initialize )
throws ClassNotFoundException throws ClassNotFoundException {
{
Class clazz; Class clazz;
if( abbreviationMap.containsKey( className ) ) if( abbreviationMap.containsKey( className ) ) {
{
clazz = Class.forName( "[" + abbreviationMap.get( className ), initialize, classLoader ).getComponentType(); clazz = Class.forName( "[" + abbreviationMap.get( className ), initialize, classLoader ).getComponentType();
} }
else else {
{
clazz = Class.forName( toProperClassName( className ), initialize, classLoader ); clazz = Class.forName( toProperClassName( className ), initialize, classLoader );
} }
return clazz; return clazz;
@ -602,8 +550,7 @@ public class ClassUtils
* @return the class represented by <code>className</code> using the <code>classLoader</code> * @return the class represented by <code>className</code> using the <code>classLoader</code>
* @throws ClassNotFoundException if the class is not found * @throws ClassNotFoundException if the class is not found
*/ */
public static Class getClass( ClassLoader classLoader, String className ) throws ClassNotFoundException public static Class getClass( ClassLoader classLoader, String className ) throws ClassNotFoundException {
{
return getClass( classLoader, className, true ); return getClass( classLoader, className, true );
} }
@ -616,8 +563,7 @@ public class ClassUtils
* @return the class represented by <code>className</code> using the current thread's context class loader * @return the class represented by <code>className</code> using the current thread's context class loader
* @throws ClassNotFoundException if the class is not found * @throws ClassNotFoundException if the class is not found
*/ */
public static Class getClass( String className ) throws ClassNotFoundException public static Class getClass( String className ) throws ClassNotFoundException {
{
return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() : return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() :
Thread.currentThread().getContextClassLoader(), className, true ); Thread.currentThread().getContextClassLoader(), className, true );
} }
@ -632,34 +578,27 @@ public class ClassUtils
* @return the class represented by <code>className</code> using the current thread's context class loader * @return the class represented by <code>className</code> using the current thread's context class loader
* @throws ClassNotFoundException if the class is not found * @throws ClassNotFoundException if the class is not found
*/ */
public static Class getClass( String className, boolean initialize ) throws ClassNotFoundException public static Class getClass( String className, boolean initialize ) throws ClassNotFoundException {
{
return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() : return getClass( Thread.currentThread().getContextClassLoader() == null ? ClassUtils.class.getClassLoader() :
Thread.currentThread().getContextClassLoader(), className, initialize ); Thread.currentThread().getContextClassLoader(), className, initialize );
} }
private static String toProperClassName( String className ) private static String toProperClassName( String className ) {
{
className = StringUtils.deleteWhitespace( className ); className = StringUtils.deleteWhitespace( className );
if( className == null ) if( className == null ) {
{
throw new NullArgumentException( "className" ); throw new NullArgumentException( "className" );
} }
else if( className.endsWith( "[]" ) ) else if( className.endsWith( "[]" ) ) {
{
final StringBuffer classNameBuffer = new StringBuffer(); final StringBuffer classNameBuffer = new StringBuffer();
while( className.endsWith( "[]" ) ) while( className.endsWith( "[]" ) ) {
{
className = className.substring( 0, className.length() - 2 ); className = className.substring( 0, className.length() - 2 );
classNameBuffer.append( "[" ); classNameBuffer.append( "[" );
} }
final String abbreviation = ( String ) abbreviationMap.get( className ); final String abbreviation = ( String ) abbreviationMap.get( className );
if( abbreviation != null ) if( abbreviation != null ) {
{
classNameBuffer.append( abbreviation ); classNameBuffer.append( abbreviation );
} }
else else {
{
classNameBuffer.append( "L" ).append( className ).append( ";" ); classNameBuffer.append( "L" ).append( className ).append( ";" );
} }
className = classNameBuffer.toString(); className = classNameBuffer.toString();