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/*******************************************************************************
* Copyright (c) 2008 Oracle Corporation.
* 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:
* Cameron Bateman - initial API and implementation
*******************************************************************************/
package org.eclipse.jst.jsf.facelet.core.internal.registry.taglib;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.jar.JarEntry;
import java.util.jar.JarFile;
import java.util.regex.Pattern;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IWorkspaceRoot;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.IPath;
import org.eclipse.jdt.core.IClasspathEntry;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jst.jsf.common.internal.strategy.SimpleStrategyComposite;
import org.eclipse.jst.jsf.facelet.core.internal.FaceletCorePlugin;
import org.eclipse.jst.jsf.facelet.core.internal.registry.taglib.faceletTaglib.FaceletTaglib;
/**
* A locator that finds Facelet taglibs in jars on the classpath
*
* @author cbateman
*
*/
public class JarFileFaceletTaglibLocator extends AbstractFaceletTaglibLocator
{
/**
* Default taglib finder that looks in meta-inf
*/
public static final TaglibJarEntryFinder _taglibMetaInfFinder = new TaglibJarEntryFinder(
Pattern.compile("META-INF/.*\\.taglib\\.xml")); //$NON-NLS-1$
/**
* Default finder that looks in the glassfish package.
*/
public static final TaglibJarEntryFinder _taglibGlassfishFinder = new TaglibJarEntryFinder(
Pattern.compile("com/sun/faces/metadata/taglib/.*\\.taglib\\.xml")); //$NON-NLS-1$
private static final String DISPLAYNAME = Messages.JarFileFaceletTaglibLocator_0;
private static final String ID = JarFileFaceletTaglibLocator.class
.getCanonicalName();
private final TagRecordFactory _factory;
private Map<String, IFaceletTagRecord> _records;
private final SimpleStrategyComposite<JarEntry, JarEntry, JarEntry, String, TaglibFinder<JarEntry, JarEntry>> _finder;
/**
* @param factory
*/
public JarFileFaceletTaglibLocator(final TagRecordFactory factory)
{
super(ID, DISPLAYNAME);
_factory = factory;
_records = new HashMap<String, IFaceletTagRecord>();
List<TaglibFinder<JarEntry, JarEntry>> finders = new ArrayList<TaglibFinder<JarEntry, JarEntry>>();
finders.add(_taglibMetaInfFinder);
finders.add(_taglibGlassfishFinder);
_finder = new SimpleStrategyComposite<JarEntry, JarEntry, JarEntry, String, TaglibFinder<JarEntry, JarEntry>>(
finders);
}
@Override
public Map<String, ? extends IFaceletTagRecord> doLocate(
final IProject project)
{
try
{
return findInJars(project);
} catch (JavaModelException e)
{
FaceletCorePlugin
.log(
"Couldn't locate jar file taglibs: " + project.getProject(), e); //$NON-NLS-1$
}
return Collections.EMPTY_MAP;
}
private Map<String, ? extends IFaceletTagRecord> findInJars(
final IProject project) throws JavaModelException
{
final IJavaProject javaProject = JavaCore.create(project);
final IClasspathEntry[] entries = javaProject
.getResolvedClasspath(true);
final List<FaceletTaglib> tagLibsFound = new ArrayList<FaceletTaglib>();
for (final IClasspathEntry entry : entries)
{
switch (entry.getEntryKind())
{
// this entry describes a source root in its project
case IClasspathEntry.CPE_SOURCE:
break;
// - this entry describes a folder or JAR containing
// binaries
case IClasspathEntry.CPE_LIBRARY:
{
tagLibsFound.addAll(processJar(entry));
}
break;
// - this entry describes another project
case IClasspathEntry.CPE_PROJECT:
// {
// final IPath pathToProject = entry.getPath();
// IWorkspace wkspace = ResourcesPlugin.getWorkspace();
// IResource res =
// wkspace.getRoot().findMember(pathToProject);
// if (res instanceof IProject)
// {
// tagLibsFound.addAll();
// }
// }
break;
// - this entry describes a project or library indirectly
// via a
// classpath variable in the first segment of the path *
case IClasspathEntry.CPE_VARIABLE:
break;
// - this entry describes set of entries referenced
// indirectly
// via a classpath container
case IClasspathEntry.CPE_CONTAINER:
break;
}
}
for (final FaceletTaglib tag : tagLibsFound)
{
IFaceletTagRecord record = _factory.createRecords(tag);
if (record != null)
{
_records.put(record.getURI(), record);
}
}
return _records;
}
/**
* TODO: Merge into JSFAppConfigUtils.
*
* @param entry
* @return
*/
private static JarFile getJarFileFromCPE(final IClasspathEntry entry)
throws IOException
{
if (entry.getEntryKind() == IClasspathEntry.CPE_LIBRARY)
{
IPath libraryPath = entry.getPath();
if (libraryPath.getFileExtension() != null
&& libraryPath.getFileExtension().length() > 0)
{
final IWorkspaceRoot workspaceRoot = ResourcesPlugin
.getWorkspace().getRoot();
if (libraryPath.getDevice() == null
&& workspaceRoot.getProject(libraryPath.segment(0))
.exists())
{
libraryPath = workspaceRoot.getFile(libraryPath)
.getLocation();
}
final String libraryPathString = libraryPath.toString();
return new JarFile(libraryPathString);
}
}
return null;
}
/**
* @param entry
* @param defaultDtdStream
*/
private List<FaceletTaglib> processJar(final IClasspathEntry entry)
{
JarFile jarFile = null;
final List<FaceletTaglib> tagLibsFound = new ArrayList<FaceletTaglib>();
try
{
jarFile = getJarFileFromCPE(entry);
if (jarFile != null)
{
final Enumeration<JarEntry> jarEntries = jarFile.entries();
while (jarEntries.hasMoreElements())
{
JarEntry jarEntry = jarEntries.nextElement();
jarEntry = _finder.perform(jarEntry);
if (jarEntry != null && jarEntry != _finder.getNoResult())
{
// if ((name.startsWith("META-INF/") //$NON-NLS-1$
// && name.endsWith(".taglib.xml")) //$NON-NLS-1$
// || (name.startsWith("com/sun/faces/metadata/taglib/") //$NON-NLS-1$ //ludo GlassFish v3
// && name.endsWith(".taglib.xml"))) //$NON-NLS-1$
{
InputStream is = null;
try
{
is = jarFile.getInputStream(jarEntry);
TagModelLoader loader = new TagModelLoader(jarEntry.getName());
loader.loadFromInputStream(is);
FaceletTaglib tagLib = loader.getTaglib();
if (tagLib != null)
{
tagLibsFound.add(tagLib);
}
} catch (final Exception e)
{
FaceletCorePlugin
.log(
"Error initializing facelet registry entry", //$NON-NLS-1$
e);
}
finally
{
if (is != null)
{
// is.close();
}
}
}
}
}
}
} catch (final IOException e)
{
FaceletCorePlugin.log(
"Error opening classpath jar file: " + entry, e); //$NON-NLS-1$
} finally
{
if (jarFile != null)
{
try
{
jarFile.close();
} catch (final IOException ioe)
{
FaceletCorePlugin.log("Error closing jar file", ioe); //$NON-NLS-1$
}
}
}
return tagLibsFound;
}
}
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