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view graal/com.oracle.truffle.api/src/com/oracle/truffle/api/instrument/impl/LineLocationToProbeCollectionMap.java @ 16873:3ad18f453679
Truffle/Instrumentation: Javadoc
author | Michael Van De Vanter <michael.van.de.vanter@oracle.com> |
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date | Wed, 20 Aug 2014 15:14:30 -0700 |
parents | 7bfbad29d331 |
children | f0e3b50c29c8 |
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/* * Copyright (c) 2013, 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.oracle.truffle.api.instrument.impl; import java.util.*; import com.oracle.truffle.api.instrument.*; import com.oracle.truffle.api.source.*; /** * A mapping from {@link LineLocation} (a line number in a specific piece of {@link Source} code) to * a collection of {@link Probe}s whose associated {@link SourceSection} starts on that line. */ public class LineLocationToProbeCollectionMap implements ProbeListener { /** * Map: Source line ==> probes associated with source sections starting on the line. */ private final Map<LineLocation, Collection<Probe>> lineToProbesMap = new HashMap<>(); public LineLocationToProbeCollectionMap() { } public void newProbeInserted(SourceSection source, Probe probe) { final LineLocation line = source.getLineLocation(); this.addProbeToLine(line, probe); } public void probeTaggedAs(Probe probe, SyntaxTag tag) { // This map ignores tags } /** * Returns the {@link Probe}, if any, associated with source that starts on a specified line; if * there are more than one, return the one with the first starting character location. */ public Probe findLineProbe(LineLocation lineLocation) { Probe probe = null; final Collection<Probe> probes = getProbesAtLine(lineLocation); for (Probe probeOnLine : probes) { if (probe == null) { probe = probeOnLine; } else if (probeOnLine.getSourceLocation().getCharIndex() < probe.getSourceLocation().getCharIndex()) { probe = probeOnLine; } } return probe; } /** * Records creation of a probe whose associated source starts on the given line. * <p> * If the line already exists in the internal {@link #lineToProbesMap}, this probe will be added * to the existing collection. If no line already exists in the internal map, then a new key is * added along with a new collection containing the probe. * <p> * This class requires that each added line/probe pair hasn't been previously added. However, * attaching the same probe to a new line location is allowed. * * @param line The {@link LineLocation} to attach the probe to. * @param probe The {@link Probe} to attach for that line location. */ private void addProbeToLine(LineLocation line, Probe probe) { if (!lineToProbesMap.containsKey(line)) { // Key does not exist, add new probe list final ArrayList<Probe> newProbeList = new ArrayList<>(2); newProbeList.add(probe); lineToProbesMap.put(line, newProbeList); } else { // Probe list exists, add to existing final Collection<Probe> existingProbeList = lineToProbesMap.get(line); assert !existingProbeList.contains(probe); existingProbeList.add(probe); } } /** * Returns a collection of {@link Probe}s whose associated source begings at the given * {@link LineLocation}. If there are no probes at that line, an empty list is returned. * * @param line The line to check. * @return A collection of probes at the given line. */ private Collection<Probe> getProbesAtLine(LineLocation line) { Collection<Probe> probeList = lineToProbesMap.get(line); if (probeList == null) probeList = new ArrayList<>(2); return probeList; } }