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/*******************************************************************************
* Copyright (c) 2007, 2012 Wind River Systems, Inc. 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:
* Markus Schorn (Wind River Systems)
*******************************************************************************/
package org.eclipse.cdt.internal.core.pdom.dom;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import org.eclipse.cdt.internal.core.pdom.db.IBTreeVisitor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
/**
* Visitor to find macros in a BTree.
* @since 4.0.2
*/
public final class MacroContainerPatternCollector implements IBTreeVisitor {
private final PDOMLinkage fLinkage;
private final List<PDOMMacroContainer> macros = new ArrayList<PDOMMacroContainer>();
private final Pattern fPattern;
private final IProgressMonitor fMonitor;
private int fMonitorCheckCounter= 0;
public MacroContainerPatternCollector(PDOMLinkage linkage, Pattern pattern, IProgressMonitor monitor) {
fLinkage= linkage;
fPattern= pattern;
fMonitor= monitor;
}
@Override
final public int compare(long record) throws CoreException {
if (fMonitor != null)
checkCancelled();
return 0;
}
@Override
final public boolean visit(long record) throws CoreException {
if (record == 0)
return true;
String name= PDOMNamedNode.getDBName(fLinkage.getDB(), record).getString();
if (fPattern.matcher(name).matches()) {
macros.add(new PDOMMacroContainer(fLinkage, record));
}
return true; // look for more
}
final public PDOMMacroContainer[] getMacroContainers() {
return macros.toArray(new PDOMMacroContainer[macros.size()]);
}
private void checkCancelled() {
if (++fMonitorCheckCounter % 0x1000 == 0 && fMonitor.isCanceled()) {
throw new OperationCanceledException();
}
}
}
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