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/*******************************************************************************
* Copyright (c) 2008 Institute for Software, HSR Hochschule fuer Technik
* Rapperswil, University of applied sciences 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:
* Institute for Software - initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.rewrite.changegenerator;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.internal.core.dom.rewrite.ASTModification;
import org.eclipse.cdt.internal.core.dom.rewrite.ASTModificationMap;
import org.eclipse.cdt.internal.core.dom.rewrite.ASTModificationStore;
public class ModificationScopeStack {
private LinkedList<List<ASTModification>> scopeStack;
private ASTModificationStore modStore;
public ModificationScopeStack(ASTModificationStore modificationStore) {
scopeStack = new LinkedList<List<ASTModification>>();
modStore = modificationStore;
ArrayList<ASTModification> nullModList = new ArrayList<ASTModification>();
nullModList.add(null);
scopeStack.addFirst(nullModList);
}
public void pushScope(IASTNode node) {
List<ASTModification> newMods = new ArrayList<ASTModification>();
for(ASTModification peekMod : scopeStack.peek()) {
ASTModificationMap nestedMods = modStore.getNestedModifications(peekMod);
if (nestedMods != null) {
newMods.addAll(nestedMods.getModificationsForNode(node));
}
}
if (!newMods.isEmpty()) {
scopeStack.addFirst(newMods);
}
}
private List<ASTModification> getNestedModifikationsForNode(IASTNode node) {
ASTModificationMap rootModifications = modStore.getRootModifications();
if (rootModifications == null) {
return Collections.emptyList();
}
return rootModifications.getModificationsForNode(node);
}
public void popScope(IASTNode node) {
List<ASTModification> peek = scopeStack.peek();
if (peek != null) {
if (!peek.isEmpty() && peek.get(0).getTargetNode() == node) {
scopeStack.removeFirst();
}
}
}
public Collection<IASTNode> getModifiedNodes() {
List<ASTModification> aktModList = scopeStack.peek();
if (aktModList == null) {
return getNestedModifiedNodes();
}
Collection<IASTNode> nodes = new ArrayList<IASTNode>();
for (ASTModification modification : aktModList) {
ASTModificationMap nestedModifications = modStore.getNestedModifications(modification);
if (nestedModifications != null) {
nodes.addAll(nestedModifications.getModifiedNodes());
}
}
return Collections.unmodifiableCollection(nodes);
}
private Collection<IASTNode> getNestedModifiedNodes() {
ASTModificationMap rootModifications = modStore.getRootModifications();
if(rootModifications == null) {
return Collections.emptyList();
}
return rootModifications.getModifiedNodes();
}
public List<ASTModification> getModificationsForNode(IASTNode node) {
List<ASTModification> aktModList = scopeStack.peek();
if (aktModList == null) {
return getNestedModifikationsForNode(node);
}
List<ASTModification> modForNodeList = new ArrayList<ASTModification>();
for (ASTModification modification : aktModList) {
modForNodeList.addAll(modStore.getNestedModifications(modification).getModificationsForNode(node));
}
return Collections.unmodifiableList(modForNodeList);
}
}
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