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.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.internal.compiler.SourceElementParser;
import org.eclipse.jdt.internal.core.index.Index;
import org.eclipse.jdt.internal.core.search.processing.JobManager;
import org.eclipse.jdt.internal.core.util.Util;

class AddFolderToIndex extends IndexRequest {
	IPath folderPath;
	IProject project;
	char[][] inclusionPatterns;
	char[][] exclusionPatterns;

	public AddFolderToIndex(IPath folderPath, IProject project, char[][] inclusionPatterns, char[][] exclusionPatterns, IndexManager manager) {
		super(project.getFullPath(), manager);
		this.folderPath = folderPath;
		this.project = project;
		this.inclusionPatterns = inclusionPatterns;
		this.exclusionPatterns = exclusionPatterns;
	}
	@Override
	public boolean execute(IProgressMonitor progressMonitor) {

		if (this.isCancelled || progressMonitor != null && progressMonitor.isCanceled()) return true;
		if (!this.project.isAccessible()) return true; // nothing to do
		IResource folder = this.project.getParent().findMember(this.folderPath);
		if (folder == null || folder.getType() == IResource.FILE) return true; // nothing to do, source folder was removed

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

		try {
			monitor.enterRead(); // ask permission to read

			final IPath container = this.containerPath;
			final IndexManager indexManager = this.manager;
			final SourceElementParser parser = indexManager.getSourceElementParser(JavaCore.create(this.project), null/*requestor will be set by indexer*/);
			if (this.exclusionPatterns == null && this.inclusionPatterns == null) {
				folder.accept(
					new IResourceProxyVisitor() {
						@Override
						public boolean visit(IResourceProxy proxy) /* throws CoreException */{
							if (proxy.getType() == IResource.FILE) {
								if (org.eclipse.jdt.internal.core.util.Util.isJavaLikeFileName(proxy.getName()))
									indexManager.addSource((IFile) proxy.requestResource(), container, parser);
								return false;
							}
							return true;
						}
					},
					IResource.NONE
				);
			} else {
				folder.accept(
					new IResourceProxyVisitor() {
						@Override
						public boolean visit(IResourceProxy proxy) /* throws CoreException */{
							switch(proxy.getType()) {
								case IResource.FILE :
									if (org.eclipse.jdt.internal.core.util.Util.isJavaLikeFileName(proxy.getName())) {
										IResource resource = proxy.requestResource();
										if (!Util.isExcluded(resource, AddFolderToIndex.this.inclusionPatterns, AddFolderToIndex.this.exclusionPatterns))
											indexManager.addSource((IFile)resource, container, parser);
									}
									return false;
								case IResource.FOLDER :
									if (AddFolderToIndex.this.exclusionPatterns != null && AddFolderToIndex.this.inclusionPatterns == null) {
										// if there are inclusion patterns then we must walk the children
										if (Util.isExcluded(proxy.requestFullPath(), AddFolderToIndex.this.inclusionPatterns, AddFolderToIndex.this.exclusionPatterns, true))
										    return false;
									}
							}
							return true;
						}
					},
					IResource.NONE
				);
			}
		} catch (CoreException e) {
			if (JobManager.VERBOSE) {
				Util.verbose("-> failed to add " + this.folderPath + " to index because of the following exception:", System.err); //$NON-NLS-1$ //$NON-NLS-2$
				e.printStackTrace();
			}
			return false;
		} finally {
			monitor.exitRead(); // free read lock
		}
		return true;
	}
	@Override
	public String toString() {
		return "adding " + this.folderPath + " to index " + this.containerPath; //$NON-NLS-1$ //$NON-NLS-2$
	}
}