/*******************************************************************************
* Copyright (c) 2000, 2007 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.core.internal.resources;
import java.io.*;
import java.util.*;
import org.eclipse.core.internal.localstore.SafeChunkyInputStream;
import org.eclipse.core.internal.localstore.SafeFileInputStream;
import org.eclipse.core.internal.utils.Messages;
import org.eclipse.core.internal.utils.Policy;
import org.eclipse.core.internal.watson.*;
import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.*;
import org.eclipse.osgi.util.NLS;
/**
* A marker manager stores and retrieves markers on resources in the workspace.
*/
public class MarkerManager implements IManager {
//singletons
private static final MarkerInfo[] NO_MARKER_INFO = new MarkerInfo[0];
private static final IMarker[] NO_MARKERS = new IMarker[0];
protected MarkerTypeDefinitionCache cache = new MarkerTypeDefinitionCache();
private long changeId = 0;
protected Map currentDeltas = null;
protected final MarkerDeltaManager deltaManager = new MarkerDeltaManager();
protected Workspace workspace;
protected MarkerWriter writer = new MarkerWriter(this);
/**
* Creates a new marker manager
*/
public MarkerManager(Workspace workspace) {
this.workspace = workspace;
}
/* (non-Javadoc)
* Adds the given markers to the given resource.
*
* @see IResource#createMarker(String)
*/
public void add(IResource resource, MarkerInfo newMarker) throws CoreException {
Resource target = (Resource) resource;
ResourceInfo info = workspace.getResourceInfo(target.getFullPath(), false, false);
target.checkExists(target.getFlags(info), false);
info = workspace.getResourceInfo(resource.getFullPath(), false, true);
//resource may have been deleted concurrently -- just bail out if this happens
if (info == null)
return;
// set the M_MARKERS_SNAP_DIRTY flag to indicate that this
// resource's markers have changed since the last snapshot
if (isPersistent(newMarker))
info.set(ICoreConstants.M_MARKERS_SNAP_DIRTY);
//Concurrency: copy the marker set on modify
MarkerSet markers = info.getMarkers(true);
if (markers == null)
markers = new MarkerSet(1);
basicAdd(resource, markers, newMarker);
if (!markers.isEmpty())
info.setMarkers(markers);
}
/**
* Adds the new markers to the given set of markers. If added, the markers
* are associated with the specified resource.IMarkerDeltas for Added markers
* are generated.
*/
private void basicAdd(IResource resource, MarkerSet markers, MarkerInfo newMarker) throws CoreException {
// should always be a new marker.
if (newMarker.getId() != MarkerInfo.UNDEFINED_ID) {
String message = Messages.resources_changeInAdd;
throw new ResourceException(new ResourceStatus(IResourceStatus.INTERNAL_ERROR, resource.getFullPath(), message));
}
newMarker.setId(workspace.nextMarkerId());
markers.add(newMarker);
IMarkerSetElement[] changes = new IMarkerSetElement[1];
changes[0] = new MarkerDelta(IResourceDelta.ADDED, resource, newMarker);
changedMarkers(resource, changes);
}
/**
* Returns the markers in the given set of markers which match the given type.
*/
protected MarkerInfo[] basicFindMatching(MarkerSet markers, String type, boolean includeSubtypes) {
int size = markers.size();
if (size <= 0)
return NO_MARKER_INFO;
List result = new ArrayList(size);
IMarkerSetElement[] elements = markers.elements();
for (int i = 0; i < elements.length; i++) {
MarkerInfo marker = (MarkerInfo) elements[i];
// if the type is null then we are looking for all types of markers
if (type == null)
result.add(marker);
else {
if (includeSubtypes) {
if (cache.isSubtype(marker.getType(), type))
result.add(marker);
} else {
if (marker.getType().equals(type))
result.add(marker);
}
}
}
size = result.size();
if (size <= 0)
return NO_MARKER_INFO;
return (MarkerInfo[]) result.toArray(new MarkerInfo[size]);
}
protected int basicFindMaxSeverity(MarkerSet markers, String type, boolean includeSubtypes) {
int max = -1;
int size = markers.size();
if (size <= 0)
return max;
IMarkerSetElement[] elements = markers.elements();
for (int i = 0; i < elements.length; i++) {
MarkerInfo marker = (MarkerInfo) elements[i];
// if the type is null then we are looking for all types of markers
if (type == null)
max = Math.max(max, getSeverity(marker));
else {
if (includeSubtypes) {
if (cache.isSubtype(marker.getType(), type))
max = Math.max(max, getSeverity(marker));
} else {
if (marker.getType().equals(type))
max = Math.max(max, getSeverity(marker));
}
}
if (max >= IMarker.SEVERITY_ERROR) {
break;
}
}
return max;
}
private int getSeverity(MarkerInfo marker) {
Object o = marker.getAttribute(IMarker.SEVERITY);
if (o instanceof Integer) {
Integer i = (Integer) o;
return i.intValue();
}
return -1;
}
/**
* Removes markers of the specified type from the given resource.
* Note: this method is protected to avoid creation of a synthetic accessor (it
* is called from an anonymous inner class).
*/
protected void basicRemoveMarkers(ResourceInfo info, IPathRequestor requestor, String type, boolean includeSubtypes) {
MarkerSet markers = info.getMarkers(false);
if (markers == null)
return;
IMarkerSetElement[] matching;
IPath path;
if (type == null) {
// if the type is null, all markers are to be removed.
//now we need to crack open the tree
path = requestor.requestPath();
info = workspace.getResourceInfo(path, false, true);
info.setMarkers(null);
matching = markers.elements();
} else {
matching = basicFindMatching(markers, type, includeSubtypes);
// if none match, there is nothing to remove
if (matching.length == 0)
return;
//now we need to crack open the tree
path = requestor.requestPath();
info = workspace.getResourceInfo(path, false, true);
//Concurrency: copy the marker set on modify
markers = info.getMarkers(true);
// remove all the matching markers and also the whole
// set if there are no remaining markers
markers.removeAll(matching);
info.setMarkers(markers.size() == 0 ? null : markers);
}
info.set(ICoreConstants.M_MARKERS_SNAP_DIRTY);
IMarkerSetElement[] changes = new IMarkerSetElement[matching.length];
IResource resource = workspace.getRoot().findMember(path);
for (int i = 0; i < matching.length; i++)
changes[i] = new MarkerDelta(IResourceDelta.REMOVED, resource, (MarkerInfo) matching[i]);
changedMarkers(resource, changes);
return;
}
/**
* Adds the markers on the given target which match the specified type to the list.
*/
protected void buildMarkers(IMarkerSetElement[] markers, IPath path, int type, ArrayList list) {
if (markers.length == 0)
return;
IResource resource = workspace.newResource(path, type);
list.ensureCapacity(list.size() + markers.length);
for (int i = 0; i < markers.length; i++) {
list.add(new Marker(resource, ((MarkerInfo) markers[i]).getId()));
}
}
/**
* Markers have changed on the given resource. Remember the changes for subsequent notification.
*/
protected void changedMarkers(IResource resource, IMarkerSetElement[] changes) {
if (changes == null || changes.length == 0)
return;
changeId++;
if (currentDeltas == null)
currentDeltas = deltaManager.newGeneration(changeId);
IPath path = resource.getFullPath();
MarkerSet previousChanges = (MarkerSet) currentDeltas.get(path);
MarkerSet result = MarkerDelta.merge(previousChanges, changes);
if (result.size() == 0)
currentDeltas.remove(path);
else
currentDeltas.put(path, result);
ResourceInfo info = workspace.getResourceInfo(path, false, true);
if (info != null)
info.incrementMarkerGenerationCount();
}
/**
* Returns the marker with the given id or <code>null</code> if none is found.
*/
public IMarker findMarker(IResource resource, long id) {
MarkerInfo info = findMarkerInfo(resource, id);
return info == null ? null : new Marker(resource, info.getId());
}
/**
* Returns the marker with the given id or <code>null</code> if none is found.
*/
public MarkerInfo findMarkerInfo(IResource resource, long id) {
ResourceInfo info = workspace.getResourceInfo(resource.getFullPath(), false, false);
if (info == null)
return null;
MarkerSet markers = info.getMarkers(false);
if (markers == null)
return null;
return (MarkerInfo) markers.get(id);
}
/**
* Returns all markers of the specified type on the given target, with option
* to search the target's children.
* Passing <code>null</code> for the type specifies a match
* for all types (i.e., <code>null</code> is a wildcard.
*/
public IMarker[] findMarkers(IResource target, final String type, final boolean includeSubtypes, int depth) {
ArrayList result = new ArrayList();
doFindMarkers(target, result, type, includeSubtypes, depth);
if (result.size() == 0)
return NO_MARKERS;
return (IMarker[]) result.toArray(new IMarker[result.size()]);
}
/**
* Fills the provided list with all markers of the specified type on the given target,
* with option to search the target's children.
* Passing <code>null</code> for the type specifies a match
* for all types (i.e., <code>null</code> is a wildcard.
*/
public void doFindMarkers(IResource target, ArrayList result, final String type, final boolean includeSubtypes, int depth) {
//optimize the deep searches with an element tree visitor
if (depth == IResource.DEPTH_INFINITE && target.getType() != IResource.FILE)
visitorFindMarkers(target.getFullPath(), result, type, includeSubtypes);
else
recursiveFindMarkers(target.getFullPath(), result, type, includeSubtypes, depth);
}
/**
* Finds the max severity across all problem markers on the given target,
* with option to search the target's children.
*/
public int findMaxProblemSeverity(IResource target, String type, boolean includeSubtypes, int depth) {
//optimize the deep searches with an element tree visitor
if (depth == IResource.DEPTH_INFINITE && target.getType() != IResource.FILE)
return visitorFindMaxSeverity(target.getFullPath(), type, includeSubtypes);
return recursiveFindMaxSeverity(target.getFullPath(), type, includeSubtypes, depth);
}
public long getChangeId() {
return changeId;
}
/**
* Returns the map of all marker deltas since the given change Id.
*/
public Map getMarkerDeltas(long startChangeId) {
return deltaManager.assembleDeltas(startChangeId);
}
/**
* Returns true if this manager has a marker delta record
* for the given marker id, and false otherwise.
*/
boolean hasDelta(IPath path, long id) {
if (currentDeltas == null)
return false;
MarkerSet set = (MarkerSet) currentDeltas.get(path);
if (set == null)
return false;
return set.get(id) != null;
}
/**
* Returns true if the given marker is persistent, and false
* otherwise.
*/
public boolean isPersistent(MarkerInfo info) {
if (!cache.isPersistent(info.getType()))
return false;
Object isTransient = info.getAttribute(IMarker.TRANSIENT);
return isTransient == null || !(isTransient instanceof Boolean) || !((Boolean) isTransient).booleanValue();
}
/**
* Returns true if <code>type</code> is a sub type of <code>superType</code>.
*/
public boolean isSubtype(String type, String superType) {
return cache.isSubtype(type, superType);
}
public void moved(final IResource source, final IResource destination, int depth) throws CoreException {
final int count = destination.getFullPath().segmentCount();
// we removed from the source and added to the destination
IResourceVisitor visitor = new IResourceVisitor() {
public boolean visit(IResource resource) {
Resource r = (Resource) resource;
ResourceInfo info = r.getResourceInfo(false, true);
MarkerSet markers = info.getMarkers(false);
if (markers == null)
return true;
info.set(ICoreConstants.M_MARKERS_SNAP_DIRTY);
IMarkerSetElement[] removed = new IMarkerSetElement[markers.size()];
IMarkerSetElement[] added = new IMarkerSetElement[markers.size()];
IPath path = resource.getFullPath().removeFirstSegments(count);
path = source.getFullPath().append(path);
IResource sourceChild = workspace.newResource(path, resource.getType());
IMarkerSetElement[] elements = markers.elements();
for (int i = 0; i < elements.length; i++) {
// calculate the ADDED delta
MarkerInfo markerInfo = (MarkerInfo) elements[i];
MarkerDelta delta = new MarkerDelta(IResourceDelta.ADDED, resource, markerInfo);
added[i] = delta;
// calculate the REMOVED delta
delta = new MarkerDelta(IResourceDelta.REMOVED, sourceChild, markerInfo);
removed[i] = delta;
}
changedMarkers(resource, added);
changedMarkers(sourceChild, removed);
return true;
}
};
destination.accept(visitor, depth, IContainer.INCLUDE_TEAM_PRIVATE_MEMBERS);
}
/**
* Adds the markers for a subtree of resources to the list.
*/
private void recursiveFindMarkers(IPath path, ArrayList list, String type, boolean includeSubtypes, int depth) {
ResourceInfo info = workspace.getResourceInfo(path, false, false);
if (info == null)
return;
MarkerSet markers = info.getMarkers(false);
//add the matching markers for this resource
if (markers != null) {
IMarkerSetElement[] matching;
if (type == null)
matching = markers.elements();
else
matching = basicFindMatching(markers, type, includeSubtypes);
buildMarkers(matching, path, info.getType(), list);
}
//recurse
if (depth == IResource.DEPTH_ZERO || info.getType() == IResource.FILE)
return;
if (depth == IResource.DEPTH_ONE)
depth = IResource.DEPTH_ZERO;
IPath[] children = workspace.getElementTree().getChildren(path);
for (int i = 0; i < children.length; i++) {
recursiveFindMarkers(children[i], list, type, includeSubtypes, depth);
}
}
/**
* Finds the max severity across problem markers for a subtree of resources.
*/
private int recursiveFindMaxSeverity(IPath path, String type, boolean includeSubtypes, int depth) {
ResourceInfo info = workspace.getResourceInfo(path, false, false);
if (info == null)
return -1;
MarkerSet markers = info.getMarkers(false);
//add the matching markers for this resource
int max = -1;
if (markers != null) {
max = basicFindMaxSeverity(markers, type, includeSubtypes);
if (max >= IMarker.SEVERITY_ERROR) {
return max;
}
}
//recurse
if (depth == IResource.DEPTH_ZERO || info.getType() == IResource.FILE)
return max;
if (depth == IResource.DEPTH_ONE)
depth = IResource.DEPTH_ZERO;
IPath[] children = workspace.getElementTree().getChildren(path);
for (int i = 0; i < children.length; i++) {
max = Math.max(max, recursiveFindMaxSeverity(children[i], type, includeSubtypes, depth));
if (max >= IMarker.SEVERITY_ERROR) {
break;
}
}
return max;
}
/**
* Adds the markers for a subtree of resources to the list.
*/
private void recursiveRemoveMarkers(final IPath path, String type, boolean includeSubtypes, int depth) {
ResourceInfo info = workspace.getResourceInfo(path, false, false);
if (info == null)//phantoms don't have markers
return;
IPathRequestor requestor = new IPathRequestor() {
public String requestName() {
return path.lastSegment();
}
public IPath requestPath() {
return path;
}
};
basicRemoveMarkers(info, requestor, type, includeSubtypes);
//recurse
if (depth == IResource.DEPTH_ZERO || info.getType() == IResource.FILE)
return;
if (depth == IResource.DEPTH_ONE)
depth = IResource.DEPTH_ZERO;
IPath[] children = workspace.getElementTree().getChildren(path);
for (int i = 0; i < children.length; i++) {
recursiveRemoveMarkers(children[i], type, includeSubtypes, depth);
}
}
/**
* Removes the specified marker
*/
public void removeMarker(IResource resource, long id) {
MarkerInfo markerInfo = findMarkerInfo(resource, id);
if (markerInfo == null)
return;
ResourceInfo info = ((Workspace) resource.getWorkspace()).getResourceInfo(resource.getFullPath(), false, true);
//Concurrency: copy the marker set on modify
MarkerSet markers = info.getMarkers(true);
int size = markers.size();
markers.remove(markerInfo);
// if that was the last marker remove the set to save space.
info.setMarkers(markers.size() == 0 ? null : markers);
// if we actually did remove a marker, post a delta for the change.
if (markers.size() != size) {
if (isPersistent(markerInfo))
info.set(ICoreConstants.M_MARKERS_SNAP_DIRTY);
IMarkerSetElement[] change = new IMarkerSetElement[] {new MarkerDelta(IResourceDelta.REMOVED, resource, markerInfo)};
changedMarkers(resource, change);
}
}
/**
* Remove all markers for the given resource to the specified depth.
*/
public void removeMarkers(IResource resource, int depth) {
removeMarkers(resource, null, false, depth);
}
/**
* Remove all markers with the given type from the node at the given path.
* Passing <code>null</code> for the type specifies a match
* for all types (i.e., <code>null</code> is a wildcard.
*/
public void removeMarkers(IResource target, final String type, final boolean includeSubtypes, int depth) {
if (depth == IResource.DEPTH_INFINITE && target.getType() != IResource.FILE)
visitorRemoveMarkers(target.getFullPath(), type, includeSubtypes);
else
recursiveRemoveMarkers(target.getFullPath(), type, includeSubtypes, depth);
}
/**
* Reset the marker deltas up to but not including the given start Id.
*/
public void resetMarkerDeltas(long startId) {
currentDeltas = null;
deltaManager.resetDeltas(startId);
}
public void restore(IResource resource, boolean generateDeltas, IProgressMonitor monitor) throws CoreException {
// first try and load the last saved file, then apply the snapshots
restoreFromSave(resource, generateDeltas);
restoreFromSnap(resource);
}
protected void restoreFromSave(IResource resource, boolean generateDeltas) throws CoreException {
IPath sourceLocation = workspace.getMetaArea().getMarkersLocationFor(resource);
IPath tempLocation = workspace.getMetaArea().getBackupLocationFor(sourceLocation);
java.io.File sourceFile = new java.io.File(sourceLocation.toOSString());
java.io.File tempFile = new java.io.File(tempLocation.toOSString());
if (!sourceFile.exists() && !tempFile.exists())
return;
try {
DataInputStream input = new DataInputStream(new SafeFileInputStream(sourceLocation.toOSString(), tempLocation.toOSString()));
try {
MarkerReader reader = new MarkerReader(workspace);
reader.read(input, generateDeltas);
} finally {
input.close();
}
} catch (Exception e) {
//don't let runtime exceptions such as ArrayIndexOutOfBounds prevent startup
String msg = NLS.bind(Messages.resources_readMeta, sourceLocation);
throw new ResourceException(IResourceStatus.FAILED_READ_METADATA, sourceLocation, msg, e);
}
}
protected void restoreFromSnap(IResource resource) {
IPath sourceLocation = workspace.getMetaArea().getMarkersSnapshotLocationFor(resource);
if (!sourceLocation.toFile().exists())
return;
try {
DataInputStream input = new DataInputStream(new SafeChunkyInputStream(sourceLocation.toFile()));
try {
MarkerSnapshotReader reader = new MarkerSnapshotReader(workspace);
while (true)
reader.read(input);
} catch (EOFException eof) {
// ignore end of file
} finally {
input.close();
}
} catch (Exception e) {
// only log the exception, we should not fail restoring the snapshot
String msg = NLS.bind(Messages.resources_readMeta, sourceLocation);
Policy.log(new ResourceStatus(IResourceStatus.FAILED_READ_METADATA, sourceLocation, msg, e));
}
}
public void save(ResourceInfo info, IPathRequestor requestor, DataOutputStream output, List list) throws IOException {
writer.save(info, requestor, output, list);
}
/* (non-Javadoc)
* @see IManager#shutdown(IProgressMonitor)
*/
public void shutdown(IProgressMonitor monitor) {
// do nothing
}
public void snap(ResourceInfo info, IPathRequestor requestor, DataOutputStream output) throws IOException {
writer.snap(info, requestor, output);
}
/* (non-Javadoc)
* @see IManager#startup(IProgressMonitor)
*/
public void startup(IProgressMonitor monitor) {
// do nothing
}
/**
* Adds the markers for a subtree of resources to the list.
*/
private void visitorFindMarkers(IPath path, final ArrayList list, final String type, final boolean includeSubtypes) {
IElementContentVisitor visitor = new IElementContentVisitor() {
public boolean visitElement(ElementTree tree, IPathRequestor requestor, Object elementContents) {
ResourceInfo info = (ResourceInfo) elementContents;
if (info == null)
return false;
MarkerSet markers = info.getMarkers(false);
//add the matching markers for this resource
if (markers != null) {
IMarkerSetElement[] matching;
if (type == null)
matching = markers.elements();
else
matching = basicFindMatching(markers, type, includeSubtypes);
buildMarkers(matching, requestor.requestPath(), info.getType(), list);
}
return true;
}
};
new ElementTreeIterator(workspace.getElementTree(), path).iterate(visitor);
}
/**
* Finds the max severity across problem markers for a subtree of resources.
*/
private int visitorFindMaxSeverity(IPath path, final String type, final boolean includeSubtypes) {
class MaxSeverityVisitor implements IElementContentVisitor {
int max = -1;
public boolean visitElement(ElementTree tree, IPathRequestor requestor, Object elementContents) {
// bail if an earlier sibling already hit the max
if (max >= IMarker.SEVERITY_ERROR) {
return false;
}
ResourceInfo info = (ResourceInfo) elementContents;
if (info == null)
return false;
MarkerSet markers = info.getMarkers(false);
//add the matching markers for this resource
if (markers != null) {
max = Math.max(max, basicFindMaxSeverity(markers, type, includeSubtypes));
}
return max < IMarker.SEVERITY_ERROR;
}
}
MaxSeverityVisitor visitor = new MaxSeverityVisitor();
new ElementTreeIterator(workspace.getElementTree(), path).iterate(visitor);
return visitor.max;
}
/**
* Adds the markers for a subtree of resources to the list.
*/
private void visitorRemoveMarkers(IPath path, final String type, final boolean includeSubtypes) {
IElementContentVisitor visitor = new IElementContentVisitor() {
public boolean visitElement(ElementTree tree, IPathRequestor requestor, Object elementContents) {
ResourceInfo info = (ResourceInfo) elementContents;
if (info == null)
return false;
basicRemoveMarkers(info, requestor, type, includeSubtypes);
return true;
}
};
new ElementTreeIterator(workspace.getElementTree(), path).iterate(visitor);
}
}