1 files changed, 123 insertions, 0 deletions
diff --git a/src/plugins/installer/src/com/motorola/studio/android/installer/utilities/P2RepositoriesFactory.java b/src/plugins/installer/src/com/motorola/studio/android/installer/utilities/P2RepositoriesFactory.java
new file mode 100644
index 0000000..a1dacfb
--- /dev/null
+++ b/src/plugins/installer/src/com/motorola/studio/android/installer/utilities/P2RepositoriesFactory.java
@@ -0,0 +1,123 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed 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 com.motorola.studio.android.installer.utilities;
+
+import java.net.URI;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.eclipse.core.runtime.IProgressMonitor;
+import org.eclipse.equinox.p2.repository.artifact.IArtifactRepository;
+import org.eclipse.equinox.p2.repository.metadata.IMetadataRepository;
+
+import com.motorola.studio.android.installer.InstallerException;
+
+/**
+ * Factory for {@link IMetadataRepository} and {@link IArtifactRepository}.
+ * Will retrieve P2 repositories based on it's URI, keeping a cached version of the repositories in order to increase speed.
+ * Note: This class is a singleton, use the getInstance() method. 
+ */
+class P2RepositoriesFactory
+{
+
+    private static P2RepositoriesFactory instance;
+
+    private final Map<URI, IMetadataRepository> metadataRepositories;
+
+    private final Map<URI, IArtifactRepository> artifactRepositories;
+
+    /*
+     * This class is a singleton.
+     */
+    private P2RepositoriesFactory()
+    {
+        metadataRepositories = new HashMap<URI, IMetadataRepository>();
+        artifactRepositories = new HashMap<URI, IArtifactRepository>();
+    }
+
+    public static P2RepositoriesFactory getInstance()
+    {
+        if (instance == null)
+        {
+            instance = new P2RepositoriesFactory();
+        }
+
+        return instance;
+    }
+
+    /**
+     * Retrieves a {@link IMetadataRepository} from a given URI.
+     * If the repository is found on the internal cache then the cached version is retrieved,
+     * otherwise the repository is loaded and added to the cache.
+     * The behavior can be overridden by setting the force flag to true. When this happens
+     * the repository will be loaded again and a new version will be put on cache. 
+     * @param uri repository URI
+     * @param force force loading the repository from the P2 mechanism.
+     * @param monitor
+     * @return {@link IMetadataRepository} from the given URI, if none is found null is returned.
+     * @throws InstallerException
+     */
+    public IMetadataRepository getMetadataRepository(URI uri, boolean force,
+            IProgressMonitor monitor) throws InstallerException
+    {
+        IMetadataRepository repository = null;
+
+        repository = metadataRepositories.get(uri);
+
+        if ((repository == null) || force)
+        {
+            repository = P2Utilities.getMetadataRepository(uri, monitor);
+            metadataRepositories.put(uri, repository);
+        }
+        else
+        {
+            monitor.done();
+        }
+        return repository;
+    }
+
+    /**
+     * Retrieves a {@link IArtifactRepository} from a given URI.
+     * If the repository is found on the internal cache then the cached version is retrieved,
+     * otherwise the repository is loaded and added to the cache.
+     * The behavior can be overridden by setting the force flag to true. When this happens
+     * the repository will be loaded again and a new version will be put on cache. 
+     * @param uri repository URI
+     * @param force force loading the repository from the P2 mechanism.
+     * @param monitor
+     * @return {@link IArtifactRepository} from the given URI, if none is found null is returned.
+     * @throws InstallerException
+     */
+    public IArtifactRepository getArtifactRepository(URI uri, boolean force,
+            IProgressMonitor monitor) throws InstallerException
+    {
+        IArtifactRepository repository = null;
+
+        repository = artifactRepositories.get(uri);
+
+        if ((repository == null) || force)
+        {
+            repository = P2Utilities.getArtifactRepository(uri, monitor);
+            artifactRepositories.put(uri, repository);
+        }
+        else
+        {
+            monitor.done();
+        }
+        return repository;
+    }
+
+}