org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/nls/NLSPropertyFileModifier.java - jdt/eclipse.jdt.ui - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2018 IBM Corporation and others.
  *
  * This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License 2.0
  * which accompanies this distribution, and is available at
  * https://www.eclipse.org/legal/epl-2.0/
  *
  * SPDX-License-Identifier: EPL-2.0
  *
  * Contributors:
  *     IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.jdt.internal.corext.refactoring.nls;

 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;

 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IPath;
 import org.eclipse.core.runtime.NullProgressMonitor;
 import org.eclipse.core.runtime.Platform;
 import org.eclipse.core.runtime.content.IContentType;

 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IProject;
 import org.eclipse.core.resources.ResourcesPlugin;

 import org.eclipse.text.edits.TextEdit;

 import org.eclipse.jface.text.Document;

 import org.eclipse.ltk.core.refactoring.Change;
 import org.eclipse.ltk.core.refactoring.DocumentChange;
 import org.eclipse.ltk.core.refactoring.TextChange;
 import org.eclipse.ltk.core.refactoring.TextFileChange;

 import org.eclipse.jdt.internal.core.manipulation.StubUtility;
 import org.eclipse.jdt.internal.core.manipulation.util.BasicElementLabels;
 import org.eclipse.jdt.internal.corext.refactoring.Checks;
 import org.eclipse.jdt.internal.corext.refactoring.changes.TextChangeCompatibility;
 import org.eclipse.jdt.internal.corext.refactoring.nls.changes.CreateTextFileChange;
 import org.eclipse.jdt.internal.corext.util.Messages;


 public class NLSPropertyFileModifier {

 	public static Change create(NLSSubstitution[] nlsSubstitutions, IPath propertyFilePath) throws CoreException {

 		String name= Messages.format(NLSMessages.NLSPropertyFileModifier_change_name, BasicElementLabels.getPathLabel(propertyFilePath, false));
 		TextChange textChange= null;
 		if (!Checks.resourceExists(propertyFilePath)) {
 			IProject project= getFileHandle(propertyFilePath).getProject();
 			String lineDelimiter= StubUtility.getLineDelimiterPreference(project);
 			Document document= new Document();
 			document.setInitialLineDelimiter(lineDelimiter);
 			textChange= new DocumentChange(name, document);
 			addChanges(textChange, nlsSubstitutions);
 			textChange.perform(new NullProgressMonitor());

 			String encoding= null;
 			IContentType javaPropertiesContentType= Platform.getContentTypeManager().getContentType("org.eclipse.jdt.core.javaProperties"); //$NON-NLS-1$
 			IContentType[] contentTypes= Platform.getContentTypeManager().findContentTypesFor(propertyFilePath.lastSegment());
 			if (contentTypes.length == 0 || contentTypes.length > 1 || !contentTypes[0].equals(javaPropertiesContentType)) {
 				if (javaPropertiesContentType != null)
 					encoding= javaPropertiesContentType.getDefaultCharset();
 				if (encoding == null)
 					encoding= "ISO-8859-1"; //$NON-NLS-1$
 			}

 			return new CreateTextFileChange(propertyFilePath, textChange.getCurrentContent(new NullProgressMonitor()), encoding, "properties"); //$NON-NLS-1$
 		}

 		textChange= new TextFileChange(name, getPropertyFile(propertyFilePath));
 		textChange.setTextType("properties"); //$NON-NLS-1$

 		addChanges(textChange, nlsSubstitutions);

 		return textChange;
 	}

 	public static Change removeKeys(IPath propertyFilePath, List<String> keys) throws CoreException {

 		String name= Messages.format(NLSMessages.NLSPropertyFileModifier_remove_from_property_file, BasicElementLabels.getPathLabel(propertyFilePath, false));
 		TextChange textChange= new TextFileChange(name, getPropertyFile(propertyFilePath));
 		textChange.setTextType("properties"); //$NON-NLS-1$

 		PropertyFileDocumentModel model= new PropertyFileDocumentModel(textChange.getCurrentDocument(new NullProgressMonitor()));

 		for (String key : keys) {
 			TextEdit edit= model.remove(key);
 			if (edit != null) {
 				TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_remove_entry, BasicElementLabels.getJavaElementName(key)), edit);
 			}
 		}
 		return textChange;
 	}

 	private static IFile getPropertyFile(IPath propertyFilePath) {
 		return (IFile) ResourcesPlugin.getWorkspace().getRoot().findMember(propertyFilePath);
 	}

 	private static IFile getFileHandle(IPath propertyFilePath) {
 		if (propertyFilePath == null)
 			return null;
 		return ResourcesPlugin.getWorkspace().getRoot().getFile(propertyFilePath);
 	}

 	private static void addChanges(TextChange textChange, NLSSubstitution[] substitutions) throws CoreException {
 		PropertyFileDocumentModel model= new PropertyFileDocumentModel(textChange.getCurrentDocument(new NullProgressMonitor()));

 		Map<String, NLSSubstitution> newKeyToSubstMap= getNewKeyToSubstitutionMap(substitutions);
 		Map<String, NLSSubstitution> oldKeyToSubstMap= getOldKeyToSubstitutionMap(substitutions);

 		addInsertEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
 		addRemoveEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
 		addReplaceEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
 	}

 	/**
 	 * Maps the new keys to a substitutions. If a substitution is not in the map then it is a duplicate.
 	 *
 	 * @param substitutions the substitutions to add to the map
 	 * @return the map containing the substitutions
 	 */
 	static HashMap<String, NLSSubstitution> getNewKeyToSubstitutionMap(NLSSubstitution[] substitutions) {
 		HashMap<String, NLSSubstitution> keyToSubstMap= new HashMap<>(substitutions.length);
 		// find all duplicates
 		for (NLSSubstitution curr : substitutions) {
 			if (curr.getState() == NLSSubstitution.EXTERNALIZED) {
 				NLSSubstitution val= keyToSubstMap.get(curr.getKey());
 				if (val == null || (val.hasPropertyFileChange() && !curr.hasPropertyFileChange())) {
 					keyToSubstMap.put(curr.getKey(), curr); // store if first or if stored in new and we are existing
 				}
 			}
 		}
 		return keyToSubstMap;
 	}

 	/**
 	 * Maps the old keys to a substitutions. If a substitution is not in the map then it is a duplicate.
 	 *
 	 * @param substitutions the substitutions to add to the map
 	 * @return the map containing the substitutions
 	 */
 	static HashMap<String, NLSSubstitution> getOldKeyToSubstitutionMap(NLSSubstitution[] substitutions) {
 		HashMap<String, NLSSubstitution> keyToSubstMap= new HashMap<>(substitutions.length);
 		// find all duplicates
 		for (NLSSubstitution curr : substitutions) {
 			if (curr.getInitialState() == NLSSubstitution.EXTERNALIZED) {
 				String key= curr.getInitialKey();
 				if (key != null) {
 					NLSSubstitution fav= keyToSubstMap.get(key);
 					if (fav == null || (fav.hasStateChanged() && !curr.hasStateChanged())) {
 						keyToSubstMap.put(key, curr); // store if first or if stored will not be externalized anymore
 					}
 				}
 			}
 		}
 		return keyToSubstMap;
 	}

 	static boolean doReplace(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
 		if (substitution.getState() != NLSSubstitution.EXTERNALIZED || substitution.hasStateChanged() || substitution.getInitialValue() == null) {
 			return false; // was not in property file before
 		}
 		if (oldKeyToSubstMap.get(substitution.getInitialKey()) != substitution) {
 			return false; // not the owner of this key
 		}
 		if (substitution.isKeyRename() || substitution.isValueRename()) {
 			if (newKeyToSubstMap.get(substitution.getKey()) == substitution) { // only rename if we're not a duplicate. duplicates will be removed
 				return true;
 			}
 		}
 		return false;
 	}

 	private static void addReplaceEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
 		for (NLSSubstitution substitution : substitutions) {
 			if (doReplace(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
 				KeyValuePair initialPair= new KeyValuePair(substitution.getInitialKey(), substitution.getInitialValue());

 				String key= PropertyFileDocumentModel.escape(substitution.getKey(), false);
 				String value= PropertyFileDocumentModel.escape(substitution.getValue(), true) + model.getLineDelimiter();
 				KeyValuePair newPair= new KeyValuePair(key, value);
 				TextEdit edit= model.replace(initialPair, newPair);
 				if (edit != null) {
 					TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_replace_entry, BasicElementLabels.getJavaElementName(substitution.getKey())), edit);
 				}
 			}
 		}
 	}

 	static boolean doInsert(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
 		if (substitution.getState() != NLSSubstitution.EXTERNALIZED) {
 			return false; // does not go into the property file
 		}
 		if (!substitution.hasStateChanged() && substitution.getInitialValue() != null) {
 			if (!substitution.isKeyRename() || oldKeyToSubstMap.get(substitution.getInitialKey()) == substitution) {
 				return false; // no key rename and was not a duplicate
 			}
 		}
 		if (newKeyToSubstMap.get(substitution.getKey()) == substitution) { // only insert if we're not a duplicate
 			return true;
 		}
 		return false;
 	}

 	private static void addInsertEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
 		ArrayList<KeyValuePair> keyValuePairsToAdd= new ArrayList<>();

 		for (NLSSubstitution substitution : substitutions) {
 			if (doInsert(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
 				String value= PropertyFileDocumentModel.escape(substitution.getValueNonEmpty(), true) + model.getLineDelimiter();
 				String key= PropertyFileDocumentModel.escape(substitution.getKey(), false);
 				keyValuePairsToAdd.add(new KeyValuePair(key, value));
 			}
 		}

 		if (keyValuePairsToAdd.size() > 0) {
 			model.insert(keyValuePairsToAdd.toArray(new KeyValuePair[keyValuePairsToAdd.size()]), textChange);
 		}
 	}

 	static boolean doRemove(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
 		if (substitution.getInitialState() != NLSSubstitution.EXTERNALIZED || substitution.getInitialKey() == null) {
 			return false; // was not in property file before
 		}
 		if (oldKeyToSubstMap.get(substitution.getInitialKey()) != substitution) {
 			return false; // not the owner of this key
 		}
 		if (substitution.hasStateChanged() // was externalized, but not anymore
 		        || (substitution.hasPropertyFileChange() && newKeyToSubstMap.get(substitution.getKey()) != substitution)) { // has been changed to an already existing
 			return true;
 		}
 		return false;
 	}

 	private static void addRemoveEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
 		for (NLSSubstitution substitution : substitutions) {
 			if (doRemove(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
 				TextEdit edit= model.remove(substitution.getInitialKey());
 				if (edit != null) {
 					TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_remove_entry, BasicElementLabels.getJavaElementName(substitution.getInitialKey())), edit);
 				}
 			}
 		}
 	}

 	private NLSPropertyFileModifier() {
 	}

 }
	/*******************************************************************************
	* Copyright (c) 2000, 2018 IBM Corporation and others.
	*
	* This program and the accompanying materials
	* are made available under the terms of the Eclipse Public License 2.0
	* which accompanies this distribution, and is available at
	* https://www.eclipse.org/legal/epl-2.0/
	*
	* SPDX-License-Identifier: EPL-2.0
	*
	* Contributors:
	* IBM Corporation - initial API and implementation
	*******************************************************************************/
	package org.eclipse.jdt.internal.corext.refactoring.nls;

	import java.util.ArrayList;
	import java.util.HashMap;
	import java.util.List;
	import java.util.Map;

	import org.eclipse.core.runtime.CoreException;
	import org.eclipse.core.runtime.IPath;
	import org.eclipse.core.runtime.NullProgressMonitor;
	import org.eclipse.core.runtime.Platform;
	import org.eclipse.core.runtime.content.IContentType;

	import org.eclipse.core.resources.IFile;
	import org.eclipse.core.resources.IProject;
	import org.eclipse.core.resources.ResourcesPlugin;

	import org.eclipse.text.edits.TextEdit;

	import org.eclipse.jface.text.Document;

	import org.eclipse.ltk.core.refactoring.Change;
	import org.eclipse.ltk.core.refactoring.DocumentChange;
	import org.eclipse.ltk.core.refactoring.TextChange;
	import org.eclipse.ltk.core.refactoring.TextFileChange;

	import org.eclipse.jdt.internal.core.manipulation.StubUtility;
	import org.eclipse.jdt.internal.core.manipulation.util.BasicElementLabels;
	import org.eclipse.jdt.internal.corext.refactoring.Checks;
	import org.eclipse.jdt.internal.corext.refactoring.changes.TextChangeCompatibility;
	import org.eclipse.jdt.internal.corext.refactoring.nls.changes.CreateTextFileChange;
	import org.eclipse.jdt.internal.corext.util.Messages;


	public class NLSPropertyFileModifier {

	public static Change create(NLSSubstitution[] nlsSubstitutions, IPath propertyFilePath) throws CoreException {

	String name= Messages.format(NLSMessages.NLSPropertyFileModifier_change_name, BasicElementLabels.getPathLabel(propertyFilePath, false));
	TextChange textChange= null;
	if (!Checks.resourceExists(propertyFilePath)) {
	IProject project= getFileHandle(propertyFilePath).getProject();
	String lineDelimiter= StubUtility.getLineDelimiterPreference(project);
	Document document= new Document();
	document.setInitialLineDelimiter(lineDelimiter);
	textChange= new DocumentChange(name, document);
	addChanges(textChange, nlsSubstitutions);
	textChange.perform(new NullProgressMonitor());

	String encoding= null;
	IContentType javaPropertiesContentType= Platform.getContentTypeManager().getContentType("org.eclipse.jdt.core.javaProperties"); //$NON-NLS-1$
	IContentType[] contentTypes= Platform.getContentTypeManager().findContentTypesFor(propertyFilePath.lastSegment());
	if (contentTypes.length == 0 \|\| contentTypes.length > 1 \|\| !contentTypes[0].equals(javaPropertiesContentType)) {
	if (javaPropertiesContentType != null)
	encoding= javaPropertiesContentType.getDefaultCharset();
	if (encoding == null)
	encoding= "ISO-8859-1"; //$NON-NLS-1$
	}

	return new CreateTextFileChange(propertyFilePath, textChange.getCurrentContent(new NullProgressMonitor()), encoding, "properties"); //$NON-NLS-1$
	}

	textChange= new TextFileChange(name, getPropertyFile(propertyFilePath));
	textChange.setTextType("properties"); //$NON-NLS-1$

	addChanges(textChange, nlsSubstitutions);

	return textChange;
	}

	public static Change removeKeys(IPath propertyFilePath, List<String> keys) throws CoreException {

	String name= Messages.format(NLSMessages.NLSPropertyFileModifier_remove_from_property_file, BasicElementLabels.getPathLabel(propertyFilePath, false));
	TextChange textChange= new TextFileChange(name, getPropertyFile(propertyFilePath));
	textChange.setTextType("properties"); //$NON-NLS-1$

	PropertyFileDocumentModel model= new PropertyFileDocumentModel(textChange.getCurrentDocument(new NullProgressMonitor()));

	for (String key : keys) {
	TextEdit edit= model.remove(key);
	if (edit != null) {
	TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_remove_entry, BasicElementLabels.getJavaElementName(key)), edit);
	}
	}
	return textChange;
	}

	private static IFile getPropertyFile(IPath propertyFilePath) {
	return (IFile) ResourcesPlugin.getWorkspace().getRoot().findMember(propertyFilePath);
	}

	private static IFile getFileHandle(IPath propertyFilePath) {
	if (propertyFilePath == null)
	return null;
	return ResourcesPlugin.getWorkspace().getRoot().getFile(propertyFilePath);
	}

	private static void addChanges(TextChange textChange, NLSSubstitution[] substitutions) throws CoreException {
	PropertyFileDocumentModel model= new PropertyFileDocumentModel(textChange.getCurrentDocument(new NullProgressMonitor()));

	Map<String, NLSSubstitution> newKeyToSubstMap= getNewKeyToSubstitutionMap(substitutions);
	Map<String, NLSSubstitution> oldKeyToSubstMap= getOldKeyToSubstitutionMap(substitutions);

	addInsertEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
	addRemoveEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
	addReplaceEdits(textChange, substitutions, newKeyToSubstMap, oldKeyToSubstMap, model);
	}

	/**
	* Maps the new keys to a substitutions. If a substitution is not in the map then it is a duplicate.
	*
	* @param substitutions the substitutions to add to the map
	* @return the map containing the substitutions
	*/
	static HashMap<String, NLSSubstitution> getNewKeyToSubstitutionMap(NLSSubstitution[] substitutions) {
	HashMap<String, NLSSubstitution> keyToSubstMap= new HashMap<>(substitutions.length);
	// find all duplicates
	for (NLSSubstitution curr : substitutions) {
	if (curr.getState() == NLSSubstitution.EXTERNALIZED) {
	NLSSubstitution val= keyToSubstMap.get(curr.getKey());
	if (val == null \|\| (val.hasPropertyFileChange() && !curr.hasPropertyFileChange())) {
	keyToSubstMap.put(curr.getKey(), curr); // store if first or if stored in new and we are existing
	}
	}
	}
	return keyToSubstMap;
	}

	/**
	* Maps the old keys to a substitutions. If a substitution is not in the map then it is a duplicate.
	*
	* @param substitutions the substitutions to add to the map
	* @return the map containing the substitutions
	*/
	static HashMap<String, NLSSubstitution> getOldKeyToSubstitutionMap(NLSSubstitution[] substitutions) {
	HashMap<String, NLSSubstitution> keyToSubstMap= new HashMap<>(substitutions.length);
	// find all duplicates
	for (NLSSubstitution curr : substitutions) {
	if (curr.getInitialState() == NLSSubstitution.EXTERNALIZED) {
	String key= curr.getInitialKey();
	if (key != null) {
	NLSSubstitution fav= keyToSubstMap.get(key);
	if (fav == null \|\| (fav.hasStateChanged() && !curr.hasStateChanged())) {
	keyToSubstMap.put(key, curr); // store if first or if stored will not be externalized anymore
	}
	}
	}
	}
	return keyToSubstMap;
	}

	static boolean doReplace(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
	if (substitution.getState() != NLSSubstitution.EXTERNALIZED \|\| substitution.hasStateChanged() \|\| substitution.getInitialValue() == null) {
	return false; // was not in property file before
	}
	if (oldKeyToSubstMap.get(substitution.getInitialKey()) != substitution) {
	return false; // not the owner of this key
	}
	if (substitution.isKeyRename() \|\| substitution.isValueRename()) {
	if (newKeyToSubstMap.get(substitution.getKey()) == substitution) { // only rename if we're not a duplicate. duplicates will be removed
	return true;
	}
	}
	return false;
	}

	private static void addReplaceEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
	for (NLSSubstitution substitution : substitutions) {
	if (doReplace(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
	KeyValuePair initialPair= new KeyValuePair(substitution.getInitialKey(), substitution.getInitialValue());

	String key= PropertyFileDocumentModel.escape(substitution.getKey(), false);
	String value= PropertyFileDocumentModel.escape(substitution.getValue(), true) + model.getLineDelimiter();
	KeyValuePair newPair= new KeyValuePair(key, value);
	TextEdit edit= model.replace(initialPair, newPair);
	if (edit != null) {
	TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_replace_entry, BasicElementLabels.getJavaElementName(substitution.getKey())), edit);
	}
	}
	}
	}

	static boolean doInsert(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
	if (substitution.getState() != NLSSubstitution.EXTERNALIZED) {
	return false; // does not go into the property file
	}
	if (!substitution.hasStateChanged() && substitution.getInitialValue() != null) {
	if (!substitution.isKeyRename() \|\| oldKeyToSubstMap.get(substitution.getInitialKey()) == substitution) {
	return false; // no key rename and was not a duplicate
	}
	}
	if (newKeyToSubstMap.get(substitution.getKey()) == substitution) { // only insert if we're not a duplicate
	return true;
	}
	return false;
	}

	private static void addInsertEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
	ArrayList<KeyValuePair> keyValuePairsToAdd= new ArrayList<>();

	for (NLSSubstitution substitution : substitutions) {
	if (doInsert(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
	String value= PropertyFileDocumentModel.escape(substitution.getValueNonEmpty(), true) + model.getLineDelimiter();
	String key= PropertyFileDocumentModel.escape(substitution.getKey(), false);
	keyValuePairsToAdd.add(new KeyValuePair(key, value));
	}
	}

	if (keyValuePairsToAdd.size() > 0) {
	model.insert(keyValuePairsToAdd.toArray(new KeyValuePair[keyValuePairsToAdd.size()]), textChange);
	}
	}

	static boolean doRemove(NLSSubstitution substitution, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap) {
	if (substitution.getInitialState() != NLSSubstitution.EXTERNALIZED \|\| substitution.getInitialKey() == null) {
	return false; // was not in property file before
	}
	if (oldKeyToSubstMap.get(substitution.getInitialKey()) != substitution) {
	return false; // not the owner of this key
	}
	if (substitution.hasStateChanged() // was externalized, but not anymore
	\|\| (substitution.hasPropertyFileChange() && newKeyToSubstMap.get(substitution.getKey()) != substitution)) { // has been changed to an already existing
	return true;
	}
	return false;
	}

	private static void addRemoveEdits(TextChange textChange, NLSSubstitution[] substitutions, Map<String, NLSSubstitution> newKeyToSubstMap, Map<String, NLSSubstitution> oldKeyToSubstMap, PropertyFileDocumentModel model) {
	for (NLSSubstitution substitution : substitutions) {
	if (doRemove(substitution, newKeyToSubstMap, oldKeyToSubstMap)) {
	TextEdit edit= model.remove(substitution.getInitialKey());
	if (edit != null) {
	TextChangeCompatibility.addTextEdit(textChange, Messages.format(NLSMessages.NLSPropertyFileModifier_remove_entry, BasicElementLabels.getJavaElementName(substitution.getInitialKey())), edit);
	}
	}
	}
	}

	private NLSPropertyFileModifier() {
	}

	}