1 files changed, 161 insertions, 0 deletions
diff --git a/maven-plugins/trunk/maven-dependency-plugin/src/main/java/org/apache/tuscany/maven/dependency/plugin/ClassConflictsDetectorMojo.java b/maven-plugins/trunk/maven-dependency-plugin/src/main/java/org/apache/tuscany/maven/dependency/plugin/ClassConflictsDetectorMojo.java
new file mode 100644
index 0000000000..7c072a6b5c
--- /dev/null
+++ b/maven-plugins/trunk/maven-dependency-plugin/src/main/java/org/apache/tuscany/maven/dependency/plugin/ClassConflictsDetectorMojo.java
@@ -0,0 +1,161 @@
+/*
+ * 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.    
+ */
+package org.apache.tuscany.maven.dependency.plugin;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.plugin.AbstractMojo;
+import org.apache.maven.plugin.MojoExecutionException;
+import org.apache.maven.plugin.logging.Log;
+import org.apache.maven.project.MavenProject;
+
+/**
+ * A Maven plugin that check for class conflicts for the dependency jars
+ * 
+ * @goal check-class-conflicts
+ * @phase validate
+ * @requiresDependencyResolution test
+ * @description check for class conflicts for the dependency jars
+ */
+public class ClassConflictsDetectorMojo extends AbstractMojo {
+
+    /**
+     * The project to build the bundle for.
+     *
+     * @parameter expression="${project}"
+     * @required
+     * @readonly
+     */
+    private MavenProject project;
+
+    /**
+     * The root directory to scan the jar files. If not set, we'll check the project dependencies
+     *
+     * @parameter 
+     */
+    private File root;
+
+    /**
+     * @parameter default-value="false"
+     */
+    private boolean ignoreTestScope;
+
+    /**
+     * @parameter default-value="true"
+     */
+    private boolean verbose;
+
+    /**
+     * @parameter default-value="false"
+     */
+    private boolean skip;
+
+    /**
+     * @parameter default-value="false"
+     */
+    private boolean failOnConflicts;
+
+    public void execute() throws MojoExecutionException {
+        if (skip) {
+            return;
+        }
+
+        Log log = getLog();
+        LogWrapper wrapper = new MavenLogWrapper(log);
+
+        try {
+            int conflicts = 0;
+            if (root != null) {
+                conflicts = ClassPathHellDetector.check(root, wrapper, verbose || wrapper.isDebugEnabled());
+            } else {
+                conflicts = ClassPathHellDetector.check(getJarFiles(log), wrapper, verbose || wrapper.isDebugEnabled());
+            }
+            if (conflicts >= 1 && failOnConflicts) {
+                throw new MojoExecutionException("Conflicting/overlapping classes are found");
+            }
+        } catch (IOException e) {
+            throw new MojoExecutionException(e.getMessage(), e);
+        }
+
+    }
+
+    private Set<File> getJarFiles(Log log) {
+        Set<File> files = new HashSet<File>();
+        for (Object a : project.getArtifacts()) {
+            Artifact artifact = (Artifact)a;
+            if (ignoreTestScope && Artifact.SCOPE_TEST.equals(artifact.getScope())) {
+                continue;
+            }
+            if (artifact.isResolved()) {
+                if ("jar".equals(artifact.getType())) {
+                    files.add(artifact.getFile());
+                }
+            }
+        }
+        return files;
+    }
+
+    private static class MavenLogWrapper implements LogWrapper {
+        private Log log;
+
+        public MavenLogWrapper(Log log) {
+            super();
+            this.log = log;
+        }
+
+        public boolean isDebugEnabled() {
+            return log.isDebugEnabled();
+        }
+
+        public void debug(String msg) {
+            log.debug(msg);
+
+        }
+
+        public void info(String msg) {
+            log.info(msg);
+        }
+
+        public void warn(String msg) {
+            log.warn(msg);
+        }
+
+        public void error(String msg) {
+            log.error(msg);
+        }
+
+        public boolean isInfoEnabled() {
+            return log.isInfoEnabled();
+        }
+
+        public boolean isWarnEnabled() {
+            return log.isWarnEnabled();
+        }
+
+        public boolean isErrorEnabled() {
+            return log.isErrorEnabled();
+        }
+
+    }
+
+}