/*******************************************************************************
* Copyright (c) 2004, 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.jst.jsp.core.internal.java.search;
import java.io.File;
import java.util.zip.CRC32;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.NullProgressMonitor;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.core.runtime.Status;
import org.eclipse.core.runtime.content.IContentType;
import org.eclipse.core.runtime.jobs.Job;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.search.IJavaSearchConstants;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.core.search.SearchDocument;
import org.eclipse.jdt.core.search.SearchEngine;
import org.eclipse.jdt.core.search.SearchPattern;
import org.eclipse.jdt.core.search.SearchRequestor;
import org.eclipse.jdt.internal.core.JavaModelManager;
import org.eclipse.jst.jsp.core.internal.JSPCoreMessages;
import org.eclipse.jst.jsp.core.internal.JSPCorePlugin;
import org.eclipse.jst.jsp.core.internal.Logger;
import org.eclipse.jst.jsp.core.internal.java.JSP2ServletNameUtil;
import org.eclipse.jst.jsp.core.internal.provisional.contenttype.ContentTypeIdForJSP;
/**
* Central access to java indexing and search. All contact between JDT indexing
* and Searching should be done through here.
*
* Clients should access the methods of this class via the single instance via
* <code>getInstance()</code>.
*
* @author pavery
*/
public class JSPSearchSupport {
// for debugging
static final boolean DEBUG;
static {
String value = Platform.getDebugOption("org.eclipse.jst.jsp.core/debug/jspsearch"); //$NON-NLS-1$
DEBUG = value != null && value.equalsIgnoreCase("true"); //$NON-NLS-1$
}
private static JSPSearchSupport singleton = null;
private JSPSearchParticipant fParticipant = null;
private IPath fJspPluginLocation = null;
// pa_TODO may be slow (esp for indexing entire workspace)
private final CRC32 fChecksumCalculator = new CRC32();
/** main cancel montior for all search support */
private final IProgressMonitor fMonitor = new NullProgressMonitor();
private JSPSearchSupport() {
// force use of single instance
}
/**
* This operation ensures that the live resource's search markers show up in
* the open editor. It also allows the ability to pass in a ProgressMonitor
*/
private class SearchJob extends Job implements IJavaSearchConstants {
String fSearchText = ""; //$NON-NLS-1$
IJavaSearchScope fScope = null;
int fSearchFor = FIELD;
int fLimitTo = ALL_OCCURRENCES;
int fMatchMode = SearchPattern.R_PATTERN_MATCH;
boolean fIsCaseSensitive = false;
SearchRequestor fRequestor = null;
IJavaElement fElement = null;
// constructor w/ java element
public SearchJob(IJavaElement element, IJavaSearchScope scope, SearchRequestor requestor) {
super(JSPCoreMessages.JSP_Search + element.getElementName());
this.fElement = element;
this.fScope = scope;
this.fRequestor = requestor;
}
// constructor w/ search text
public SearchJob(String searchText, IJavaSearchScope scope, int searchFor, int limitTo, int matchMode, boolean isCaseSensitive, SearchRequestor requestor) {
super(JSPCoreMessages.JSP_Search + searchText);
this.fSearchText = searchText;
this.fScope = scope;
this.fSearchFor = searchFor;
this.fLimitTo = limitTo;
this.fMatchMode = matchMode;
this.fIsCaseSensitive = isCaseSensitive;
this.fRequestor = requestor;
}
public IStatus run(IProgressMonitor jobMonitor) {
if (jobMonitor != null && jobMonitor.isCanceled())
return Status.CANCEL_STATUS;
if (JSPSearchSupport.getInstance().isCanceled())
return Status.CANCEL_STATUS;
SearchPattern javaSearchPattern = null;
// if an element is available, use that to create search pattern
// (eg. LocalVariable)
// otherwise use the text and other paramters
if (this.fElement != null)
javaSearchPattern = SearchPattern.createPattern(this.fElement, this.fLimitTo);
else
javaSearchPattern = SearchPattern.createPattern(this.fSearchText, this.fSearchFor, this.fLimitTo, this.fMatchMode);
if (javaSearchPattern != null) {
JSPSearchParticipant[] participants = { getSearchParticipant() };
SearchEngine engine = new SearchEngine();
try {
if (jobMonitor != null)
jobMonitor.beginTask("", IProgressMonitor.UNKNOWN); //$NON-NLS-1$
engine.search(javaSearchPattern, participants, this.fScope, this.fRequestor, jobMonitor);
} catch (CoreException e) {
if (DEBUG)
Logger.logException(e);
}
// non-CoreExceptions will permanently stall the Worker thread
catch (Exception e) {
if (DEBUG)
Logger.logException(e);
} finally {
if (jobMonitor != null)
jobMonitor.done();
}
}
return Status.OK_STATUS;
}
}
// end SearchJob
/**
* Runnable forces caller to wait until finished (as opposed to using a Job)
*/
private class SearchRunnable implements IWorkspaceRunnable, IJavaSearchConstants {
String fSearchText = ""; //$NON-NLS-1$
IJavaSearchScope fScope = null;
int fSearchFor = FIELD;
int fLimitTo = ALL_OCCURRENCES;
int fMatchMode = SearchPattern.R_PATTERN_MATCH;
boolean fIsCaseSensitive = false;
SearchRequestor fRequestor = null;
IJavaElement fElement = null;
// constructor w/ java element
public SearchRunnable(IJavaElement element, IJavaSearchScope scope, SearchRequestor requestor) {
this.fElement = element;
this.fScope = scope;
this.fRequestor = requestor;
}
// constructor w/ search text
public SearchRunnable(String searchText, IJavaSearchScope scope, int searchFor, int limitTo, int matchMode, boolean isCaseSensitive, SearchRequestor requestor) {
this.fSearchText = searchText;
this.fScope = scope;
this.fSearchFor = searchFor;
this.fLimitTo = limitTo;
this.fMatchMode = matchMode;
this.fIsCaseSensitive = isCaseSensitive;
this.fRequestor = requestor;
}
public void run(IProgressMonitor monitor) throws CoreException {
if (monitor != null && monitor.isCanceled())
return;
if (JSPSearchSupport.getInstance().isCanceled())
return;
SearchPattern javaSearchPattern = null;
// if an element is available, use that to create search pattern
// (eg. LocalVariable)
// otherwise use the text and other paramters
if (this.fElement != null)
javaSearchPattern = SearchPattern.createPattern(this.fElement, fLimitTo);
else
javaSearchPattern = SearchPattern.createPattern(fSearchText, fSearchFor, fLimitTo, fMatchMode);
if (javaSearchPattern != null) {
JSPSearchParticipant[] participants = { getSearchParticipant() };
SearchEngine engine = new SearchEngine();
try {
if (monitor != null)
monitor.beginTask("", 0); //$NON-NLS-1$
engine.search(javaSearchPattern, participants, fScope, fRequestor, monitor);
} catch (CoreException e) {
Logger.logException(e);
//throw e;
}
// non-CoreExceptions will permanently stall the Worker thread
catch (Exception e) {
Logger.logException(e);
} finally {
if (monitor != null)
monitor.done();
}
}
}
}
// end SearchRunnable
/**
* Clients should access the methods of this class via the single instance
* via getInstance()
*
* @return
*/
public synchronized static JSPSearchSupport getInstance() {
if (singleton == null)
singleton = new JSPSearchSupport();
return singleton;
}
/**
* Utility method to check if a file is a jsp file (since this is done
* frequently)
*/
public static boolean isJsp(IFile file) {
// (pa) 20051025 removing deep content type check
// because this method is called frequently
// and IO is expensive
boolean isJsp = false;
if (file != null && file.exists()) {
IContentType contentTypeJSP = Platform.getContentTypeManager().getContentType(ContentTypeIdForJSP.ContentTypeID_JSP);
// check this before description, it's less expensive
if (contentTypeJSP.isAssociatedWith(file.getName())) {
isJsp = true;
}
}
return isJsp;
}
/**
* schedules a search document representing this JSP file for indexing (by
* the java indexer)
*
* @param file
* the JSP file
* @return true if indexing was successful, false otherwise
* @throws CoreException
*/
public SearchDocument addJspFile(IFile file) {
if (JSPSearchSupport.getInstance().isCanceled() || !file.isAccessible()) {
return null;
}
if (DEBUG)
System.out.println("adding JSP file:" + file.getFullPath()); //$NON-NLS-1$
// create
SearchDocument delegate = createSearchDocument(file);
// null if not a jsp file
if (delegate != null) {
try {
getSearchParticipant().scheduleDocumentIndexing(delegate, computeIndexLocation(file.getParent().getFullPath()));
} catch (Exception e) {
// ensure that failure here doesn't keep other documents from
// being indexed
// if peformed in a batch call (like JSPIndexManager)
if (DEBUG)
e.printStackTrace();
}
}
if (DEBUG)
System.out.println("scheduled" + delegate + "for indexing"); //$NON-NLS-1$ //$NON-NLS-2$
return delegate;
}
/**
* Perform a java search w/ the given parameters. Runs in a background Job
* (results may still come in after this method call)
*
* @param searchText
* the string of text to search on
* @param searchFor
* IJavaSearchConstants.TYPE, METHOD, FIELD, PACKAGE, etc...
* @param limitTo
* IJavaSearchConstants.DECLARATIONS,
* IJavaSearchConstants.REFERENCES,
* IJavaSearchConstants.IMPLEMENTORS, or
* IJavaSearchConstants.ALL_OCCURRENCES
* @param matchMode
* allow * wildcards or not
* @param isCaseSensitive
* @param requestor
* passed in to accept search matches (and do "something" with
* them)
*/
public void search(String searchText, IJavaSearchScope scope, int searchFor, int limitTo, int matchMode, boolean isCaseSensitive, SearchRequestor requestor) {
JSPIndexManager.getInstance().rebuildIndexIfNeeded();
SearchJob job = new SearchJob(searchText, scope, searchFor, limitTo, matchMode, isCaseSensitive, requestor);
setCanceled(false);
job.setUser(true);
// https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=5032
// pops up user operation blocked dialog if you perform a long search,
// then open a file because it locks the workspace
//job.setRule(ResourcesPlugin.getWorkspace().getRoot());
job.schedule();
}
/**
* Search for an IJavaElement, constrained by the given parameters. Runs in
* a background Job (results may still come in after this method call)
*
* @param element
* @param scope
* @param requestor
*/
public void search(IJavaElement element, IJavaSearchScope scope, SearchRequestor requestor) {
JSPIndexManager.getInstance().rebuildIndexIfNeeded();
SearchJob job = new SearchJob(element, scope, requestor);
setCanceled(false);
job.setUser(true);
// https://w3.opensource.ibm.com/bugzilla/show_bug.cgi?id=5032
//job.setRule(ResourcesPlugin.getWorkspace().getRoot());
job.schedule();
}
/**
* Search for an IJavaElement, constrained by the given parameters. Runs in
* an IWorkspace runnable (results will be reported by the end of this
* method)
*
* @param element
* @param scope
* @param requestor
*/
public void searchRunnable(IJavaElement element, IJavaSearchScope scope, SearchRequestor requestor) {
JSPIndexManager.getInstance().rebuildIndexIfNeeded();
SearchRunnable searchRunnable = new SearchRunnable(element, scope, requestor);
try {
setCanceled(false);
ResourcesPlugin.getWorkspace().run(searchRunnable, JSPSearchSupport.getInstance().getProgressMonitor());
} catch (CoreException e) {
e.printStackTrace();
}
}
/**
* @param jspFile
* @return SearchDocument if the file is not null, exists, and is a JSP
* file, otherwise null.
*/
private SearchDocument createSearchDocument(IFile jspFile) {
JavaSearchDocumentDelegate delegate = null;
if (jspFile != null && jspFile.exists() && isJsp(jspFile)) {
delegate = new JavaSearchDocumentDelegate(new JSPSearchDocument(jspFile.getFullPath().toString(), getSearchParticipant()));
}
return delegate;
}
/**
* Centralized place to access JSPSearchDocuments (used by
* JSPSearchParticipant and JSPSearchRequestor)
*
* @param searchDocPath
* @param doc
* @return the JSPSearchDocument or null if one is not found
*/
public SearchDocument getSearchDocument(String searchDocPath) {
SearchDocument delegate = null;
IFile f = fileForCUPath(searchDocPath);
if (f != null) {
delegate = createSearchDocument(f);
} else {
// handle failure case... (file deleted maybe?)
}
return delegate;
}
/**
* Unmangles the searchDocPath and returns the corresponding JSP file.
*
* @param searchDocPath
*/
private IFile fileForCUPath(String searchDocPath) {
String[] split = searchDocPath.split("/"); //$NON-NLS-1$
String classname = split[split.length - 1];
// ignore anything but .java matches (like .class binary matches)
if(!searchDocPath.endsWith(".java")) { //$NON-NLS-1$
return null;
}
String filePath = JSP2ServletNameUtil.unmangle(classname);
// try absolute path
IFile f = ResourcesPlugin.getWorkspace().getRoot().getFileForLocation(new Path(filePath));
// workspace relative then
if(f == null) {
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=86009
// must have a project name as well
// which would mean >= 2 path segments
IPath path = new Path(filePath);
if(path.segmentCount() >= 2) {
f = ResourcesPlugin.getWorkspace().getRoot().getFile(path);
}
}
return f;
}
JSPSearchParticipant getSearchParticipant() {
if (this.fParticipant == null)
this.fParticipant = new JSPSearchParticipant();
return this.fParticipant;
}
// This is called from JSPPathIndexer
// pa_TODO
//how can we make sure participant indexLocations are updated at startup?
public final IPath computeIndexLocation(IPath containerPath) {
IPath indexLocation = null;
// we don't want to inadvertently use a JDT Index
// we want to be sure to use the Index from the JSP location
//Object obj = indexLocations.get(containerPath);
//if (obj != null) {
// indexLocation = (String) obj;
//} else {
// create index entry
String pathString = containerPath.toOSString();
this.fChecksumCalculator.reset();
this.fChecksumCalculator.update(pathString.getBytes());
String fileName = Long.toString(this.fChecksumCalculator.getValue()) + ".index"; //$NON-NLS-1$
// this is the only difference from
// IndexManager#computeIndexLocation(...)
indexLocation = getModelJspPluginWorkingLocation().append(fileName);
// pa_TODO need to add to java path too, so JDT search support knows
// there should be a non internal way to do this.
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=77564
JavaModelManager.getIndexManager().indexLocations.put(containerPath, indexLocation);
//}
return indexLocation;
}
// copied from JDT IndexManager
public IPath getModelJspPluginWorkingLocation() {
if (this.fJspPluginLocation != null)
return this.fJspPluginLocation;
// Append the folder name "jspsearch" to keep the state location area cleaner
IPath stateLocation = JSPCorePlugin.getDefault().getStateLocation().append("jspsearch");
// pa_TODO workaround for
// https://bugs.eclipse.org/bugs/show_bug.cgi?id=62267
// copied from IndexManager
String device = stateLocation.getDevice();
if (device != null && device.charAt(0) == '/')
stateLocation = stateLocation.setDevice(device.substring(1));
// ensure that it exists on disk
File folder = new File(stateLocation.toOSString());
if (!folder.isDirectory()) {
try {
folder.mkdir();
}
catch (SecurityException e) {
}
}
return this.fJspPluginLocation = stateLocation;
}
/**
* JSP Indexing and Search jobs check this
*
* @return
*/
public synchronized final void setCanceled(boolean cancel) {
//System.out.println("search support monitor" + fMonitor);
fMonitor.setCanceled(cancel);
}
/**
* JSP Indexing and Search jobs check this
*
* @return
*/
public synchronized final boolean isCanceled() {
return fMonitor.isCanceled();
}
/**
* JSP Indexing and Search jobs check this
*
* @return
*/
public final IProgressMonitor getProgressMonitor() {
return this.fMonitor;
}
}
