1 files changed, 82 insertions, 0 deletions

diff --git a/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/Bundles.java b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/Bundles.java
index efca3d27..cc101bae 100644
--- a/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/Bundles.java
+++ b/org.eclipse.m2e.core/src/org/eclipse/m2e/core/internal/Bundles.java
@@ -11,15 +11,30 @@
 
 package org.eclipse.m2e.core.internal;
 
+import java.io.File;
+import java.io.IOException;
+import java.net.URL;
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.HashSet;
+import java.util.LinkedHashSet;
+import java.util.List;
 import java.util.Set;
 
 import org.osgi.framework.Bundle;
+import org.osgi.framework.BundleException;
+import org.osgi.framework.Constants;
 import org.osgi.framework.namespace.BundleNamespace;
 import org.osgi.framework.namespace.PackageNamespace;
 import org.osgi.framework.wiring.BundleWire;
 import org.osgi.framework.wiring.BundleWiring;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.eclipse.core.runtime.FileLocator;
+import org.eclipse.osgi.util.ManifestElement;
+
+import org.eclipse.m2e.core.internal.equinox.DevClassPathHelper;
 
 
 /**
@@ -27,6 +42,8 @@ import org.osgi.framework.wiring.BundleWiring;
  */
 public class Bundles {
 
+  private static final Logger log = LoggerFactory.getLogger(Bundles.class);
+
   private static Bundle findDependencyBundle(Bundle bundle, String dependencyName, Set<Bundle> visited) {
     BundleWiring bundleWiring = bundle.adapt(BundleWiring.class);
     if(bundleWiring == null) {
@@ -62,4 +79,69 @@ public class Bundles {
     return bundleWiring.getClassLoader();
   }
 
+  public static List<String> getClasspathEntries(Bundle bundle) {
+    log.debug("getClasspathEntries(Bundle={})", bundle.toString());
+    Set<String> cp = new LinkedHashSet<String>();
+    if(DevClassPathHelper.inDevelopmentMode()) {
+      cp.addAll(Arrays.asList(DevClassPathHelper.getDevClassPath(bundle.getSymbolicName())));
+    }
+    cp.addAll(Arrays.asList(parseBundleClasspath(bundle)));
+    List<String> entries = new ArrayList<>();
+    for(String cpe : cp) {
+      String entry;
+      if(".".equals(cpe)) {
+        entry = getNestedJarOrDir(bundle, "/");
+      } else {
+        entry = getNestedJarOrDir(bundle, cpe);
+      }
+
+      if(entry != null) {
+        log.debug("\tEntry:{}", entry);
+        entries.add(entry);
+      }
+    }
+    return entries;
+  }
+
+  private static String[] parseBundleClasspath(Bundle bundle) {
+    String[] result = new String[] {"."};
+    String header = bundle.getHeaders().get(Constants.BUNDLE_CLASSPATH);
+    ManifestElement[] classpathEntries = null;
+    try {
+      classpathEntries = ManifestElement.parseHeader(Constants.BUNDLE_CLASSPATH, header);
+    } catch(BundleException ex) {
+      log.warn("Could not parse bundle classpath of {}", bundle.toString(), ex);
+    }
+    if(classpathEntries != null) {
+      result = new String[classpathEntries.length];
+      for(int i = 0; i < classpathEntries.length; i++ ) {
+        result[i] = classpathEntries[i].getValue();
+      }
+    }
+    return result;
+  }
+
+  private static String getNestedJarOrDir(Bundle bundle, String cp) {
+    // try embeded entries first
+    URL url = bundle.getEntry(cp);
+    if(url != null) {
+      try {
+        return FileLocator.toFileURL(url).getFile();
+      } catch(IOException ex) {
+        log.warn("Could not get entry {} for bundle {}", new Object[] {cp, bundle.toString(), ex});
+      }
+    }
+
+    // in development mode entries can be absolute paths outside of bundle basedir
+    if(DevClassPathHelper.inDevelopmentMode()) {
+      File file = new File(cp);
+      if(file.exists() && file.isAbsolute()) {
+        return file.getAbsolutePath();
+      }
+    }
+
+    log.debug("Bundle {} does not have entry {}", bundle.toString(), cp);
+    return null;
+  }
+
 }