Copyright (c) 2000, 2009 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
/*******************************************************************************
 * Copyright (c) 2000, 2009 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.core.search.indexing;

import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.internal.core.index.Index;

class RemoveFromIndex extends IndexRequest {
	String resourceName;

	public RemoveFromIndex(String resourceName, IPath containerPath, IndexManager manager) {
		super(containerPath, manager);
		this.resourceName = resourceName;
	}
	@Override
	public boolean execute(IProgressMonitor progressMonitor) {

		if (this.isCancelled || progressMonitor != null && progressMonitor.isCanceled()) return true;

		/* ensure no concurrent write access to index */
		Index index = this.manager.getIndex(this.containerPath, true, /*reuse index file*/ false /*create if none*/);
		if (index == null) return true;
		ReadWriteMonitor monitor = index.monitor;
		if (monitor == null) return true; // index got deleted since acquired

		try {
			monitor.enterWrite(); // ask permission to write
			index.remove(this.resourceName);
		} finally {
			monitor.exitWrite(); // free write lock
		}
		return true;
	}
	@Override
	public String toString() {
		return "removing " + this.resourceName + " from index " + this.containerPath; //$NON-NLS-1$ //$NON-NLS-2$
	}
}