svn commit: r691844 - /maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java

[jv...@apache.org]

Author: jvanzyl
Date: Wed Sep  3 17:55:12 2008
New Revision: 691844

URL: http://svn.apache.org/viewvc?rev=691844&view=rev
Log:
[MSHADE-39]  adding a resource transformer that can deal with META-INF/services entries.


Added:
    maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java   (with props)

Added: maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java
URL: http://svn.apache.org/viewvc/maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java?rev=691844&view=auto
==============================================================================
--- maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java (added)
+++ maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java Wed Sep  3 17:55:12 2008
@@ -0,0 +1,95 @@
+package org.apache.maven.plugins.shade.resource;
+
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.Map;
+import java.util.jar.JarEntry;
+import java.util.jar.JarOutputStream;
+
+import org.codehaus.plexus.util.IOUtil;
+import org.jdom.Content;
+
+/**
+ * Resources transformer that appends entries in META-INF/services resources into
+ * a single resource. For example, if there are several META-INF/services/org.apache.maven.project.ProjectBuilder
+ * resources spread across many JARs the individual entries will all be concatenated into a single
+ * META-INF/services/org.apache.maven.project.ProjectBuilder resource packaged into the resultant JAR produced
+ * by the shading process.
+ *  
+ * @author jvanzyl
+ */
+public class ServicesResourceTransformer
+    implements ResourceTransformer
+{
+    private static final String SERVICES_PATH = "META-INF/services";
+    
+    private ByteArrayOutputStream data;
+
+    private Map serviceEntries = new HashMap();
+    
+    public boolean canTransformResource( String resource )
+    {
+        if ( resource.startsWith( SERVICES_PATH ) )
+        {            
+            data = (ByteArrayOutputStream) serviceEntries.get( resource );
+            
+            if ( data == null )
+            {
+                data = new ByteArrayOutputStream();
+                serviceEntries.put(  resource, data );
+            }            
+            
+            return true;
+        }
+
+        return false;
+    }
+
+    public void processResource( InputStream is )
+        throws IOException
+    {
+        IOUtil.copy( is, data );
+        is.close();
+    }
+
+    public boolean hasTransformedResource()
+    {
+        return serviceEntries.size() > 0;
+    }
+
+    public void modifyOutputStream( JarOutputStream jos )
+        throws IOException
+    {
+        for ( Iterator i = serviceEntries.keySet().iterator(); i.hasNext(); )
+        {
+            String key = (String) i.next();
+            ByteArrayOutputStream data = (ByteArrayOutputStream) serviceEntries.get( key );
+            jos.putNextEntry( new JarEntry( key ) );
+            IOUtil.copy( new ByteArrayInputStream( data.toByteArray() ), jos );
+            data.reset();
+        }        
+    }
+}

Propchange: maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java
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Propchange: maven/plugins/trunk/maven-shade-plugin/src/main/java/org/apache/maven/plugins/shade/resource/ServicesResourceTransformer.java
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    svn:keywords = "Author Date Id Revision"