| /******************************************************************************* |
| * Copyright (c) 2000, 2016 IBM Corporation and others. |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Public License v. 2.0 which is available at |
| * http://www.eclipse.org/legal/epl-2.0. |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.core.search; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.IProgressMonitor; |
| import org.eclipse.core.runtime.OperationCanceledException; |
| import org.eclipse.dltk.core.search.IDLTKSearchScope; |
| import org.eclipse.dltk.core.search.SearchParticipant; |
| import org.eclipse.dltk.core.search.SearchPattern; |
| import org.eclipse.dltk.core.search.index.Index; |
| import org.eclipse.dltk.core.search.indexing.IndexManager; |
| import org.eclipse.dltk.core.search.indexing.ReadWriteMonitor; |
| import org.eclipse.dltk.core.search.matching.MatchLocator; |
| import org.eclipse.dltk.internal.core.ModelManager; |
| import org.eclipse.dltk.internal.core.search.processing.IJob; |
| import org.eclipse.dltk.internal.core.search.processing.JobManager; |
| |
| |
| public class PatternSearchJob implements IJob { |
| |
| protected SearchPattern pattern; |
| |
| protected IDLTKSearchScope scope; |
| |
| protected SearchParticipant participant; |
| |
| protected IndexQueryRequestor requestor; |
| |
| protected boolean areIndexesReady; |
| |
| protected long executionTime = 0; |
| |
| public PatternSearchJob(SearchPattern pattern, |
| SearchParticipant participant, IDLTKSearchScope scope, |
| IndexQueryRequestor requestor) { |
| this.pattern = pattern; |
| this.participant = participant; |
| this.scope = scope; |
| this.requestor = requestor; |
| } |
| |
| @Override |
| public boolean belongsTo(String jobFamily) { |
| return true; |
| } |
| |
| @Override |
| public void cancel() { |
| // search job is cancelled through progress |
| } |
| |
| @Override |
| public void ensureReadyToRun() { |
| if (!this.areIndexesReady) |
| getIndexes(null/* progress */); // may trigger some index recreation |
| } |
| |
| @Override |
| public boolean execute(IProgressMonitor progressMonitor) { |
| if (progressMonitor != null && progressMonitor.isCanceled()) |
| throw new OperationCanceledException(); |
| |
| boolean isComplete = COMPLETE; |
| executionTime = 0; |
| Index[] indexes = getIndexes(progressMonitor); |
| try { |
| int max = indexes.length; |
| if (progressMonitor != null) |
| progressMonitor.beginTask("", max); //$NON-NLS-1$ |
| for (int i = 0; i < max; i++) { |
| isComplete &= search(indexes[i], progressMonitor); |
| if (progressMonitor != null) { |
| if (progressMonitor.isCanceled()) |
| throw new OperationCanceledException(); |
| progressMonitor.worked(1); |
| } |
| } |
| if (JobManager.VERBOSE) |
| System.err.println("-> execution time: " + executionTime + "ms - " + this);//$NON-NLS-1$//$NON-NLS-2$ |
| return isComplete; |
| } finally { |
| if (progressMonitor != null) |
| progressMonitor.done(); |
| } |
| } |
| |
| public Index[] getIndexes(IProgressMonitor progressMonitor) { |
| // acquire the in-memory indexes on the fly |
| IPath[] indexLocations = this.participant.selectIndexes(this.pattern, |
| this.scope); |
| int length = indexLocations.length; |
| Index[] indexes = new Index[length]; |
| int count = 0; |
| IndexManager indexManager = ModelManager.getModelManager() |
| .getIndexManager(); |
| for (int i = 0; i < length; i++) { |
| if (progressMonitor != null && progressMonitor.isCanceled()) |
| throw new OperationCanceledException(); |
| // may trigger some index recreation work |
| String indexLocation = indexLocations[i].toOSString(); |
| Index index = indexManager.getIndex(indexLocation); |
| if (index == null) { |
| // only need containerPath if the index must be built |
| IPath containerPath = (IPath) indexManager.indexLocations |
| .keyForValue(indexLocation); |
| if (containerPath != null) // sanity check |
| index = indexManager |
| .getIndex(containerPath, indexLocation, |
| true /* reuse index file */, false /* |
| * do |
| * not |
| * create |
| * if |
| * none |
| */); |
| } |
| if (index != null) { |
| // index.setDiskIndexCaching(this.pattern instanceof MixinPattern); |
| indexes[count++] = index; // only consider indexes which are |
| // ready |
| } |
| } |
| if (count == length) |
| this.areIndexesReady = true; |
| else |
| System.arraycopy(indexes, 0, indexes = new Index[count], 0, count); |
| return indexes; |
| } |
| |
| public boolean search(Index index, IProgressMonitor progressMonitor) { |
| if (index == null) |
| return COMPLETE; |
| if (progressMonitor != null && progressMonitor.isCanceled()) |
| throw new OperationCanceledException(); |
| |
| ReadWriteMonitor monitor = index.monitor; |
| if (monitor == null) |
| return COMPLETE; // index got deleted since acquired |
| try { |
| monitor.enterRead(); // ask permission to read |
| long start = System.currentTimeMillis(); |
| MatchLocator.findIndexMatches(this.pattern, index, requestor, |
| this.participant, this.scope, progressMonitor); |
| executionTime += System.currentTimeMillis() - start; |
| return COMPLETE; |
| } catch (IOException e) { |
| if (e instanceof java.io.EOFException) |
| e.printStackTrace(); |
| return FAILED; |
| } finally { |
| monitor.exitRead(); // finished reading |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "searching " + pattern.toString(); //$NON-NLS-1$ |
| } |
| } |