Simplifying the unaccent code to no longer support Java 5
git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1296774 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Henri Yandell
parent
5bfccfb508
commit
b24330cd37
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@ -19,6 +19,7 @@ package org.apache.commons.lang3;
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import java.io.UnsupportedEncodingException;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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import java.text.Normalizer;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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@ -609,9 +610,6 @@ public class StringUtils {
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* <p>For instance, 'à' will be replaced by 'a'.</p>
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* <p>Note that ligatures will be left as is.</p>
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*
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* <p>This method will use the first available implementation of:
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* Java 6's {@link java.text.Normalizer}, Java 1.3–1.5's {@code sun.text.Normalizer}</p>
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*
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* <pre>
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* StringUtils.stripAccents(null) = null
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* StringUtils.stripAccents("") = ""
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@ -629,130 +627,10 @@ public class StringUtils {
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if(input == null) {
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return null;
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}
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try {
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String result = null;
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if (InitStripAccents.java6NormalizeMethod != null) {
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result = removeAccentsJava6(input);
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} else if (InitStripAccents.sunDecomposeMethod != null) {
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result = removeAccentsSUN(input);
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} else {
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throw new UnsupportedOperationException(
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"The stripAccents(CharSequence) method requires at least"
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+" Java6, but got: "+InitStripAccents.java6Exception
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+"; or a Sun JVM: "+InitStripAccents.sunException);
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}
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// Note that none of the above methods correctly remove ligatures...
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return result;
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} catch(IllegalArgumentException iae) {
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throw new RuntimeException("IllegalArgumentException occurred", iae);
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} catch(IllegalAccessException iae) {
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throw new RuntimeException("IllegalAccessException occurred", iae);
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} catch(InvocationTargetException ite) {
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throw new RuntimeException("InvocationTargetException occurred", ite);
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} catch(SecurityException se) {
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throw new RuntimeException("SecurityException occurred", se);
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}
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}
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/**
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* Use {@code java.text.Normalizer#normalize(CharSequence, Normalizer.Form)}
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* (but be careful, this class exists in Java 1.3, with an entirely different meaning!)
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*
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* @param text the text to be processed
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* @return the processed string
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* @throws IllegalAccessException may be thrown by a reflection call
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* @throws InvocationTargetException if a reflection call throws an exception
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* @throws IllegalStateException if the {@code Normalizer} class is not available
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*/
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private static String removeAccentsJava6(CharSequence text)
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throws IllegalAccessException, InvocationTargetException {
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/*
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String decomposed = java.text.Normalizer.normalize(CharSequence, Normalizer.Form.NFD);
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return java6Pattern.matcher(decomposed).replaceAll("");//$NON-NLS-1$
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*/
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if (InitStripAccents.java6NormalizeMethod == null || InitStripAccents.java6NormalizerFormNFD == null) {
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throw new IllegalStateException("java.text.Normalizer is not available", InitStripAccents.java6Exception);
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}
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String result;
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result = (String) InitStripAccents.java6NormalizeMethod.invoke(null, new Object[] {text, InitStripAccents.java6NormalizerFormNFD});
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result = InitStripAccents.java6Pattern.matcher(result).replaceAll("");//$NON-NLS-1$
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return result;
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}
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/**
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* Use {@code sun.text.Normalizer#decompose(String, boolean, int)}
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*
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* @param text the text to be processed
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* @return the processed string
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* @throws IllegalAccessException may be thrown by a reflection call
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* @throws InvocationTargetException if a reflection call throws an exception
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* @throws IllegalStateException if the {@code Normalizer} class is not available
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*/
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private static String removeAccentsSUN(CharSequence text)
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throws IllegalAccessException, InvocationTargetException {
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/*
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String decomposed = sun.text.Normalizer.decompose(text, false, 0);
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return sunPattern.matcher(decomposed).replaceAll("");//$NON-NLS-1$
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*/
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if (InitStripAccents.sunDecomposeMethod == null) {
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throw new IllegalStateException("sun.text.Normalizer is not available", InitStripAccents.sunException);
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}
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String result;
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result = (String) InitStripAccents.sunDecomposeMethod.invoke(null, new Object[] {text, Boolean.FALSE, Integer.valueOf(0)});
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result = InitStripAccents.sunPattern.matcher(result).replaceAll("");//$NON-NLS-1$
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return result;
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}
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// IOD container for stripAccent() initialisation
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private static class InitStripAccents {
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// SUN internal, Java 1.3 -> Java 5
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private static final Throwable sunException;
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private static final Method sunDecomposeMethod;
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private static final Pattern sunPattern = Pattern.compile("\\p{InCombiningDiacriticalMarks}+");//$NON-NLS-1$
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// Java 6+
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private static final Throwable java6Exception;
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private static final Method java6NormalizeMethod;
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private static final Object java6NormalizerFormNFD;
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private static final Pattern java6Pattern = sunPattern;
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static {
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// Set up defaults for final static fields
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Object _java6NormalizerFormNFD = null;
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Method _java6NormalizeMethod = null;
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Method _sunDecomposeMethod = null;
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Throwable _java6Exception = null;
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Throwable _sunException = null;
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try {
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// java.text.Normalizer.normalize(CharSequence, Normalizer.Form.NFD);
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// Be careful not to get Java 1.3 java.text.Normalizer!
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Class<?> normalizerFormClass = Thread.currentThread().getContextClassLoader()
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.loadClass("java.text.Normalizer$Form");//$NON-NLS-1$
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_java6NormalizerFormNFD = normalizerFormClass.getField("NFD").get(null);//$NON-NLS-1$
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Class<?> normalizerClass = Thread.currentThread().getContextClassLoader()
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.loadClass("java.text.Normalizer");//$NON-NLS-1$
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_java6NormalizeMethod = normalizerClass.getMethod("normalize",//$NON-NLS-1$
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new Class[] {CharSequence.class, normalizerFormClass});//$NON-NLS-1$
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} catch (Exception e1) {
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// Only check for Sun method if Java 6 method is not available
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_java6Exception = e1;
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try {
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// sun.text.Normalizer.decompose(text, false, 0);
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Class<?> normalizerClass = Thread.currentThread().getContextClassLoader()
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.loadClass("sun.text.Normalizer");//$NON-NLS-1$
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_sunDecomposeMethod = normalizerClass.getMethod("decompose",//$NON-NLS-1$
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new Class[] {String.class, Boolean.TYPE, Integer.TYPE});//$NON-NLS-1$
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} catch (Exception e2) {
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_sunException = e2;
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}
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}
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// Set up final static fields
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java6Exception = _java6Exception;
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java6NormalizerFormNFD = _java6NormalizerFormNFD;
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java6NormalizeMethod = _java6NormalizeMethod;
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sunException = _sunException;
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sunDecomposeMethod = _sunDecomposeMethod;
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}
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Pattern pattern = Pattern.compile("\\p{InCombiningDiacriticalMarks}+");//$NON-NLS-1$
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String decomposed = Normalizer.normalize(input, Normalizer.Form.NFD);
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// Note that this doesn't correctly remove ligatures...
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return pattern.matcher(decomposed).replaceAll("");//$NON-NLS-1$
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}
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// Equals
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