org.eclipse.xtext.ui.resource.JavaProjectResourceSetInitializer.java Source code

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Here is the source code for org.eclipse.xtext.ui.resource.JavaProjectResourceSetInitializer.java

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/*******************************************************************************
 * Copyright (c) 2013 itemis AG (http://www.itemis.eu) 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
 *******************************************************************************/
package org.eclipse.xtext.ui.resource;

import static com.google.common.collect.Maps.*;

import java.util.HashMap;
import java.util.Map;

import org.apache.log4j.Logger;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IStorage;
import org.eclipse.emf.common.util.URI;
import org.eclipse.emf.ecore.plugin.EcorePlugin;
import org.eclipse.emf.ecore.resource.ResourceSet;
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.xtext.resource.XtextResourceSet;
import org.eclipse.xtext.ui.util.JdtClasspathUriResolver;
import org.eclipse.xtext.util.Pair;

import com.google.inject.Inject;

/**
 * @author Sven Efftinge - Initial contribution and API
 * @author Sebastian Zarnekow - Extracted code from XtextResourceSetProvider
 * @since 2.5
 */
public class JavaProjectResourceSetInitializer implements IResourceSetInitializer {

    private final static Logger LOG = Logger.getLogger(JavaProjectResourceSetInitializer.class);

    @Inject
    private IStorage2UriMapperJdtExtensions storage2UriMapper;

    @Override
    public void initialize(ResourceSet resourceSet, IProject project) {
        if (resourceSet instanceof XtextResourceSet) {
            XtextResourceSet casted = (XtextResourceSet) resourceSet;
            IJavaProject javaProject = JavaCore.create(project);
            if (javaProject != null && javaProject.exists()) {
                casted.getURIConverter().getURIMap().putAll(computePlatformURIMap(javaProject));
                casted.setClasspathURIContext(javaProject);
                casted.setClasspathUriResolver(new JdtClasspathUriResolver());
            }
        }
    }

    protected Map<URI, URI> computePlatformURIMap(IJavaProject javaProject) {
        HashMap<URI, URI> hashMap = newHashMap();
        try {
            hashMap.putAll(EcorePlugin.computePlatformURIMap(false));
        } catch (Exception e) {
            LOG.error(e.getMessage(), e);
        }
        if (!javaProject.exists())
            return hashMap;
        try {
            IPackageFragmentRoot[] roots = javaProject.getAllPackageFragmentRoots();
            for (IPackageFragmentRoot root : roots) {
                Pair<URI, URI> uriMapping = storage2UriMapper.getURIMapping(root);
                if (uriMapping != null) {

                    // we could just install the prefix mapping, i.e. platform:resource/my.project/ -> file:/my/path/to/my.project/
                    // but then we wouldn't be able to load resources when using hosted bundles, because the target path points to the bin folder.
                    // so instead we install qualified file mappings, which also makes normalization faster (i.e. just a lookup in a map instead of testing prefix URIs)
                    //
                    Map<URI, IStorage> mapping = storage2UriMapper.getAllEntries(root);
                    for (URI key : mapping.keySet()) {
                        IStorage storage = mapping.get(key);
                        URI physicalURI = null;
                        if (storage instanceof IFile) {
                            physicalURI = URI.createPlatformResourceURI(storage.getFullPath().toString(), true);
                        } else {
                            physicalURI = key.replacePrefix(uriMapping.getFirst(), uriMapping.getSecond());
                        }
                        hashMap.put(key, physicalURI);
                        if (key.isPlatformResource()) {
                            URI pluginURI = URI.createPlatformPluginURI(key.toPlatformString(false), false);
                            hashMap.put(pluginURI, physicalURI);
                        }
                    }
                }
            }
        } catch (JavaModelException e) {
            LOG.error(e.getMessage(), e);
        } catch (NoClassDefFoundError e) { // guard against broken Eclipse installations / bogus project configuration
            LOG.error(e.getMessage(), e);
        }
        return hashMap;
    }

}