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/*******************************************************************************
* Copyright (c) 2009 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
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.ui.refactoring.extractfunction;
import java.util.ArrayList;
import java.util.List;
import java.util.Map.Entry;
import org.eclipse.core.resources.IFile;
import org.eclipse.text.edits.TextEditGroup;
import org.eclipse.cdt.core.dom.ast.ASTVisitor;
import org.eclipse.cdt.core.dom.ast.IASTName;
import org.eclipse.cdt.core.dom.ast.IASTNode;
import org.eclipse.cdt.core.dom.ast.IASTStatement;
import org.eclipse.cdt.core.dom.rewrite.ASTRewrite;
import org.eclipse.cdt.internal.ui.refactoring.ModificationCollector;
import org.eclipse.cdt.internal.ui.refactoring.NodeContainer;
import org.eclipse.cdt.internal.ui.refactoring.NodeContainer.NameInformation;
final class SimilarFinderVisitor extends ASTVisitor {
private final ExtractFunctionRefactoring refactoring;
private final List<IASTNode> trail;
private final IASTName name;
private final List<IASTNode> statements;
private int statementCount;
private NodeContainer similarContainer;
private final List<IASTStatement> stmtToReplace = new ArrayList<IASTStatement>();
private final ModificationCollector collector;
SimilarFinderVisitor(ExtractFunctionRefactoring refactoring, ModificationCollector collector,
List<IASTNode> trail, IFile file, IASTName name, List<IASTNode> statements,
String title) {
this.refactoring = refactoring;
this.trail = trail;
this.name = name;
this.statements = statements;
this.collector = collector;
this.similarContainer = new NodeContainer();
shouldVisitStatements = true;
}
@Override
public int visit(IASTStatement statement) {
if (!isInSelection(statement) &&
refactoring.isStatementInTrail(statement, trail, refactoring.getIndex())) {
stmtToReplace.add(statement);
similarContainer.add(statement);
++statementCount;
if (statementCount == statements.size()) {
// Found similar code
boolean similarOnReturnWays = true;
for (NameInformation nameInfo : similarContainer.getParameterCandidates()) {
if (refactoring.names.containsKey(nameInfo.getDeclaration().getRawSignature())) {
Integer nameOrderNumber = refactoring.names.get(nameInfo.getDeclaration().getRawSignature());
if (refactoring.nameTrail.containsValue(nameOrderNumber)) {
String orgName = null;
boolean found = false;
for (Entry<String, Integer> entry : refactoring.nameTrail.entrySet()) {
if (entry.getValue().equals(nameOrderNumber)) {
orgName = entry.getKey();
break;
}
}
if (orgName != null) {
for (NameInformation orgNameInfo : refactoring.container.getParameterCandidates()) {
if (orgName.equals(orgNameInfo.getDeclaration().getRawSignature()) &&
(orgNameInfo.isOutput() || !nameInfo.isOutput())) {
found = true;
break;
}
}
}
if (!found) {
similarOnReturnWays = false;
}
}
}
}
if (similarOnReturnWays) {
IASTNode call = refactoring.getMethodCall(name, refactoring.nameTrail,
refactoring.names, refactoring.container, similarContainer);
ASTRewrite rewrite =
collector.rewriterForTranslationUnit(stmtToReplace.get(0).getTranslationUnit());
TextEditGroup editGroup = new TextEditGroup(Messages.SimilarFinderVisitor_replaceDuplicateCode);
rewrite.replace(stmtToReplace.get(0), call, editGroup);
if (stmtToReplace.size() > 1) {
for (int i = 1; i < stmtToReplace.size(); ++i) {
rewrite.remove(stmtToReplace.get(i), editGroup);
}
}
}
clear();
}
return PROCESS_SKIP;
} else {
clear();
return super.visit(statement);
}
}
private boolean isInSelection(IASTStatement stmt) {
List<IASTNode>nodes = refactoring.container.getNodesToWrite();
for (IASTNode node : nodes) {
if (node.equals(stmt)) {
return true;
}
}
return false;
}
private void clear() {
statementCount = 0;
refactoring.names.clear();
similarContainer = new NodeContainer();
refactoring.namesCounter.setObject(ExtractFunctionRefactoring.NULL_INTEGER);
refactoring.trailPos.setObject(ExtractFunctionRefactoring.NULL_INTEGER);
stmtToReplace.clear();
}
}
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