From e5b7380c874745c989d1816b8f552504f038e1bc Mon Sep 17 00:00:00 2001
From: lresende <lresende@13f79535-47bb-0310-9956-ffa450edef68>
Date: Thu, 26 Sep 2013 20:33:20 +0000
Subject: 2.0 branch for possible maintenance release

git-svn-id: http://svn.us.apache.org/repos/asf/tuscany@1526672 13f79535-47bb-0310-9956-ffa450edef68
---
 .../java/injection/ResourceObjectFactory.java      | 89 ++++++++++++++++++++++
 1 file changed, 89 insertions(+)
 create mode 100644 sca-java-2.x/branches/2.0/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/ResourceObjectFactory.java

(limited to 'sca-java-2.x/branches/2.0/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/ResourceObjectFactory.java')

diff --git a/sca-java-2.x/branches/2.0/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/ResourceObjectFactory.java b/sca-java-2.x/branches/2.0/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/ResourceObjectFactory.java
new file mode 100644
index 0000000000..8e2cd66299
--- /dev/null
+++ b/sca-java-2.x/branches/2.0/modules/implementation-java-runtime/src/main/java/org/apache/tuscany/sca/implementation/java/injection/ResourceObjectFactory.java
@@ -0,0 +1,89 @@
+/*
+ * 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.sca.implementation.java.injection;
+
+import org.apache.tuscany.sca.core.factory.ObjectCreationException;
+import org.apache.tuscany.sca.core.factory.ObjectFactory;
+
+import org.apache.tuscany.sca.implementation.java.ResourceHost;
+import org.apache.tuscany.sca.implementation.java.ResourceResolutionException;
+
+/**
+ * Resolves a runtime resource to be injected on a field or method of a Java component type marked with {@link
+ * javax.annotation.Resource}. If the mapped name of the resource is an absolute URI such as
+ * <code>sca://localhost</code> or <code>jndi://localhost</code> the host container namespace is searched; otherwise the
+ * URI is assumed to be relative and the parent composite is searched. If a mapped name is not provided, i.e. resolution
+ * is by type, the parent composite is first searched followed by the host namespace.
+ *
+ * @version $Rev$ $Date$
+ */
+public class ResourceObjectFactory<T> implements ObjectFactory<T> {
+
+    private Class<T> type;
+    private String mappedName;
+    private ResourceHost host;
+    private boolean optional;
+
+    /**
+     * Instantiates a factory that resolves resources by type
+     *
+     * @param type     the type of the resource to inject
+     * @param optional true if an error should be thrown if the resource is not found
+     * @param host     the runtime resource provider
+     */
+    public ResourceObjectFactory(Class<T> type, boolean optional, ResourceHost host) {
+        this(type, null, optional, host);
+    }
+
+    /**
+     * Instantiates a factory that resolves resources by mapped name
+     *
+     * @param type       the type of the resource to inject
+     * @param mappedName the resource name
+     * @param optional   true if an error should be thrown if the resource is not found
+     * @param host       the runtime resource provider
+     */
+    public ResourceObjectFactory(Class<T> type, String mappedName, boolean optional, ResourceHost host) {
+        this.type = type;
+        this.host = host;
+        this.mappedName = mappedName;
+        this.optional = optional;
+    }
+
+    public T getInstance() throws ObjectCreationException {
+        try {
+            T resource;
+            if (mappedName == null) {
+                resource = host.resolveResource(type);
+                if (!optional && resource == null) {
+                    throw new ResourceNotFoundException("Resource not found: " + type.getName());
+                }
+            } else {
+                resource = host.resolveResource(type, mappedName);
+                if (!optional && resource == null) {
+                    throw new ResourceNotFoundException("Resource not found: " + mappedName);
+                }
+            }
+            return resource;
+        } catch (ResourceResolutionException e) {
+            throw new ObjectCreationException(e);
+        }
+
+    }
+}
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