[540971] Re-instate internal BundleUnitResolver API used by GMF Tooling

1 files changed, 152 insertions, 0 deletions

diff --git a/plugins/org.eclipse.m2m.qvt.oml.runtime/src/org/eclipse/m2m/internal/qvt/oml/runtime/project/BundleUnitResolver.java b/plugins/org.eclipse.m2m.qvt.oml.runtime/src/org/eclipse/m2m/internal/qvt/oml/runtime/project/BundleUnitResolver.java
new file mode 100644
index 000000000..aa0de6f82
--- /dev/null
+++ b/plugins/org.eclipse.m2m.qvt.oml.runtime/src/org/eclipse/m2m/internal/qvt/oml/runtime/project/BundleUnitResolver.java
@@ -0,0 +1,152 @@
+/*******************************************************************************
+ * Copyright (c) 2009 Borland Software 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:
+ *     Borland Software Corporation - initial API and implementation
+ *     Ed Willink - bug 540971
+ *******************************************************************************/
+package org.eclipse.m2m.internal.qvt.oml.runtime.project;
+
+
+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;
+
+/* obsolete class re-instated to avoid GMF Tooling breakage - see Bug 540971 */
+/* @deprecated use PlatformPluginUnitResolver  */
+@Deprecated
+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;
+	}
+}