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/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.jsdt.internal.corext.refactoring.util;
import java.util.Arrays;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
import org.eclipse.ltk.core.refactoring.TextEditBasedChange;
import org.eclipse.wst.jsdt.core.IJavaScriptUnit;
import org.eclipse.wst.jsdt.internal.corext.refactoring.changes.CompilationUnitChange;
/**
* A <code>TextChangeManager</code> manages associations between <code>IJavaScriptUnit</code>
* or <code>IFile</code> and <code>TextEditBasedChange</code> objects.
*/
public class TextEditBasedChangeManager {
private Map/*<IJavaScriptUnit, TextEditBasedChange>*/ fMap= new HashMap(10);
private final boolean fKeepExecutedTextEdits;
public TextEditBasedChangeManager() {
this(false);
}
public TextEditBasedChangeManager(boolean keepExecutedTextEdits) {
fKeepExecutedTextEdits= keepExecutedTextEdits;
}
/**
* Adds an association between the given compilation unit and the passed
* change to this manager.
*
* @param cu the compilation unit (key)
* @param change the change associated with the compilation unit
*/
public void manage(IJavaScriptUnit cu, TextEditBasedChange change) {
fMap.put(cu, change);
}
/**
* Returns the <code>TextEditBasedChange</code> associated with the given compilation unit.
* If the manager does not already manage an association it creates a one.
*
* @param cu the compilation unit for which the text buffer change is requested
* @return the text change associated with the given compilation unit.
*/
public TextEditBasedChange get(IJavaScriptUnit cu) {
TextEditBasedChange result= (TextEditBasedChange)fMap.get(cu);
if (result == null) {
result= new CompilationUnitChange(cu.getElementName(), cu);
result.setKeepPreviewEdits(fKeepExecutedTextEdits);
fMap.put(cu, result);
}
return result;
}
/**
* Removes the <tt>TextEditBasedChange</tt> managed under the given key
* <code>unit<code>.
*
* @param unit the key determining the <tt>TextEditBasedChange</tt> to be removed.
* @return the removed <tt>TextEditBasedChange</tt>.
*/
public TextEditBasedChange remove(IJavaScriptUnit unit) {
return (TextEditBasedChange)fMap.remove(unit);
}
/**
* Returns all text changes managed by this instance.
*
* @return all text changes managed by this instance
*/
public TextEditBasedChange[] getAllChanges(){
Set cuSet= fMap.keySet();
IJavaScriptUnit[] cus= (IJavaScriptUnit[]) cuSet.toArray(new IJavaScriptUnit[cuSet.size()]);
// sort by cu name:
Arrays.sort(cus, new Comparator() {
public int compare(Object o1, Object o2) {
String name1= ((IJavaScriptUnit) o1).getElementName();
String name2= ((IJavaScriptUnit) o2).getElementName();
return name1.compareTo(name2);
}
});
TextEditBasedChange[] textChanges= new TextEditBasedChange[cus.length];
for (int i= 0; i < cus.length; i++) {
textChanges[i]= (TextEditBasedChange) fMap.get(cus[i]);
}
return textChanges;
}
/**
* Returns all compilation units managed by this instance.
*
* @return all compilation units managed by this instance
*/
public IJavaScriptUnit[] getAllCompilationUnits(){
return (IJavaScriptUnit[]) fMap.keySet().toArray(new IJavaScriptUnit[fMap.keySet().size()]);
}
/**
* Clears all associations between resources and text changes.
*/
public void clear() {
fMap.clear();
}
/**
* Returns if any text changes are managed for the specified compilation unit.
*
* @param cu the compilation unit
* @return <code>true</code> if any text changes are managed for the specified compilation unit and <code>false</code> otherwise
*/
public boolean containsChangesIn(IJavaScriptUnit cu){
return fMap.containsKey(cu);
}
}
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