| /******************************************************************************* |
| * Copyright (c) 2009 Borland Software 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: |
| * Borland Software Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gmf.internal.xpand.util; |
| |
| |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.Reader; |
| import java.net.MalformedURLException; |
| import java.net.URL; |
| import java.net.URLConnection; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.IPath; |
| import org.eclipse.core.runtime.Path; |
| import org.eclipse.emf.common.util.URI; |
| import org.eclipse.m2m.internal.qvt.oml.common.MDAConstants; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.BlackboxUnitResolver; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.DelegatingUnitResolver; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.ResolverUtils; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.UnitContents; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.UnitProxy; |
| import org.eclipse.m2m.internal.qvt.oml.compiler.UnitResolver; |
| |
| |
| public class BundleUnitResolver extends DelegatingUnitResolver { |
| |
| private final class BundleUnit extends UnitProxy { |
| |
| private final URL url; |
| |
| private BundleUnit(String namespace, String unitName, URL unitURL) { |
| super(namespace, unitName, createUnitURI(unitURL)); |
| this.url = unitURL; |
| } |
| |
| @Override |
| public int getContentType() { |
| return UnitProxy.TYPE_CST_STREAM; |
| } |
| |
| @Override |
| public UnitContents getContents() throws IOException { |
| return new UnitContents.CSTContents() { |
| public Reader getContents() throws IOException { |
| URLConnection connection = url.openConnection(); |
| |
| String charset = connection.getContentEncoding(); |
| if(charset == null) { |
| charset = "UTF-8"; //$NON-NLS-1$ |
| } |
| |
| return new InputStreamReader(connection.getInputStream(), charset); |
| } |
| }; |
| } |
| |
| @Override |
| public UnitResolver getResolver() { |
| return BundleUnitResolver.this; |
| } |
| |
| } |
| |
| |
| private List<URL> fBaseURLs; |
| |
| public BundleUnitResolver(List<URL> baseURL) { |
| if(baseURL == null || baseURL.contains(null)) { |
| throw new IllegalArgumentException(); |
| } |
| |
| fBaseURLs = new ArrayList<URL>(baseURL); |
| } |
| |
| @Override |
| protected UnitProxy doResolveUnit(String qualifiedName) { |
| for (URL baseURL : fBaseURLs) { |
| UnitProxy unit = doResolveUnit(baseURL, qualifiedName); |
| if(unit != null) { |
| return unit; |
| } |
| } |
| |
| return null; |
| } |
| |
| private UnitProxy doResolveUnit(URL baseURL, String qualifiedName) { |
| String pathStr = qualifiedName.replace('.', '/'); |
| IPath path = new Path(pathStr).addFileExtension(MDAConstants.QVTO_FILE_EXTENSION); |
| URL url; |
| try { |
| url = new URL(baseURL, path.toString()); |
| } catch (MalformedURLException e1) { |
| return null; |
| } |
| |
| InputStream is = null; |
| try { |
| is = url.openStream(); |
| |
| String name = path.lastSegment(); |
| String namespace = null; |
| if(path.segmentCount() > 1) { |
| IPath nameSpacePath = path.removeLastSegments(1); |
| namespace = ResolverUtils.getNamespace(nameSpacePath); |
| } |
| |
| return new BundleUnit(namespace, name, url); |
| |
| } catch (IOException e) { |
| return null; |
| } finally { |
| if(is != null) { |
| try { |
| is.close(); |
| } catch (IOException e) { |
| // do nothing |
| } |
| } |
| } |
| } |
| |
| private static URI createUnitURI(URL url) { |
| // TODO - we might not necessarily be passed a platform URL |
| // to do adjustments to produce a valid URI |
| return URI.createURI(url.toString()); |
| } |
| |
| public static UnitResolver createResolver(List<URL> bundleBaseURLs, boolean includeBlackboxUnits) { |
| BundleUnitResolver bundleUnitResolver = new BundleUnitResolver(bundleBaseURLs); |
| if(includeBlackboxUnits) { |
| bundleUnitResolver.setParent(BlackboxUnitResolver.DEFAULT); |
| } |
| |
| return bundleUnitResolver; |
| } |
| } |