/*******************************************************************************
* Copyright (c) 2011 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.jsf.project;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.core.runtime.Status;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.internal.core.JarPackageFragmentRoot;
import org.eclipse.wst.common.project.facet.core.IFacetedProject;
import org.eclipse.wst.common.project.facet.core.IProjectFacet;
import org.eclipse.wst.common.project.facet.core.IProjectFacetVersion;
import org.eclipse.wst.common.project.facet.core.ProjectFacetsManager;
import org.jboss.tools.common.util.FileUtil;
import org.jboss.tools.jsf.JSFModelPlugin;
/**
*
* @author Viacheslav Kabanovich
*
*/
public class JSF2Util {
/**
* Returns true if either project has in class path jsf-api.jar with implementation version 2
* or it is faceted project with jst.jsf facet of version 2.
*
* @param project
* @return
* @throws CoreException
*/
public static boolean isJSF2(IProject project) throws CoreException {
int v = getJSFImplementationVersion(project);
return (v > 1) || isJSF2FacetedProject(project);
}
/**
* Returns implementation version of 'jsf-api.jar' if it is included into class path;
* returns -1 if 'jsf-api.jar' is not found in the class path.
*
* @param project
* @return
* @throws CoreException
*/
public static int getJSFImplementationVersion(IProject project) throws CoreException {
try {
String content = readManifest(project, "jsf-api.jar");
if(content != null) {
String attr = "Implementation-Version";
int i = content.indexOf(attr);
if(i < 0) return -1;
i += attr.length();
for (int j = i; j < content.length(); j++) {
char ch = content.charAt(j);
if(Character.isDigit(ch)) {
return (int)ch - (int)'0';
}
}
}
} catch (IOException e) {
throw new CoreException(new Status(IStatus.ERROR, JSFModelPlugin.PLUGIN_ID, "Failed to read manifest in jsf-api.jar in project " + project.getName(), e));
}
return -1;
}
/**
* Returns text content of META-INF/MANIFEST.MF of selected jar file;
* returns null if jar file is not found in the class path.
*
* @param project
* @param jarName
* @return
* @throws CoreException
* @throws IOException
*/
public static String readManifest(IProject project, String jarName) throws CoreException, IOException {
IPackageFragmentRoot library = findLibrary(project, jarName);
if(library instanceof JarPackageFragmentRoot) {
ZipFile zip = ((JarPackageFragmentRoot)library).getJar();
ZipEntry entry = zip.getEntry("META-INF/MANIFEST.MF");
if(entry != null) {
InputStream is = zip.getInputStream(entry);
if(is != null) {
return FileUtil.readStream(is);
}
}
}
return null;
}
/**
* Returns root object of Java Model for selected jar file;
* returns null if jar file is not found in the class path. *
*
* @param project
* @param jarName
* @return
* @throws JavaModelException
*/
public static IPackageFragmentRoot findLibrary(IProject project, String jarName) throws JavaModelException {
if(project == null || !project.isAccessible()) {
return null;
}
IJavaProject javaProject = JavaCore.create(project);
if(javaProject == null || !javaProject.exists()) {
return null;
}
for (IPackageFragmentRoot fragmentRoot : javaProject.getAllPackageFragmentRoots()) {
IPath resource = fragmentRoot.getPath();
if(resource != null && resource.lastSegment().equals(jarName)) {
return fragmentRoot;
}
}
return null;
}
/**
* Returns true if selected project is a faceted project with jst.jsf fact of version 2.
*
* @param project
* @return
* @throws CoreException
*/
public static boolean isJSF2FacetedProject(IProject project) throws CoreException {
IProjectFacet facet = ProjectFacetsManager.getProjectFacet("jst.jsf");
IFacetedProject fp = ProjectFacetsManager.create(project);
if(fp != null) {
IProjectFacetVersion v = fp.getProjectFacetVersion(facet);
if(v != null) {
String vs = v.getVersionString();
return vs != null && vs.startsWith("2.");
}
}
return false;
}
}