diff options
Diffstat (limited to 'sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/injection/InterCompositeReferenceFactory.java')
-rw-r--r-- | sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/injection/InterCompositeReferenceFactory.java | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/injection/InterCompositeReferenceFactory.java b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/injection/InterCompositeReferenceFactory.java new file mode 100644 index 0000000000..55d8a88790 --- /dev/null +++ b/sca-java-1.x/tags/java-M1-20060522/java/sca/core/src/main/java/org/apache/tuscany/core/injection/InterCompositeReferenceFactory.java @@ -0,0 +1,75 @@ +/** + * + * Copyright 2005 The Apache Software Foundation or its licensors, as applicable. + * + * 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 org.apache.tuscany.core.injection; + +import org.apache.tuscany.core.builder.ContextResolver; +import org.apache.tuscany.core.builder.ObjectFactory; +import org.apache.tuscany.core.context.CompositeContext; +import org.apache.tuscany.core.context.Context; +import org.apache.tuscany.core.context.QualifiedName; +import org.apache.tuscany.core.context.TargetException; + +/** + * Returns a direct reference to a target service exposed in another composite, i.e. the factory avoids creating proxies + * and returns the actual target instance + * + * @version $Rev: 384135 $ $Date: 2006-03-07 22:53:58 -0800 (Tue, 07 Mar 2006) $ + */ +public class InterCompositeReferenceFactory<T> implements ObjectFactory<T> { + + private ContextResolver resolver; + + private QualifiedName targetQualifiedName; + + /** + * Reference source is an external service, target is in another module + * + * @param targetName the name of the target service + */ + public InterCompositeReferenceFactory(String targetName) { + targetQualifiedName = new QualifiedName(targetName); + } + + public void setContextResolver(ContextResolver resolver){ + this.resolver = resolver; + } + + public T getInstance() throws ObjectCreationException { + // only return entry points since this is an inter-module wire + Object o = resolver.getCurrentContext().getInstance(targetQualifiedName); + if (o != null) { + return (T) o; + } else { + // walk up the hierarchy of composite contexts + CompositeContext ctx = resolver.getCurrentContext(); + do { + if (ctx == null) { + break; // reached top of context hierarchy + } + Context compContext = ctx.getContext(targetQualifiedName.getPartName()); + if (compContext != null) { + o = compContext.getInstance(targetQualifiedName); + if (o != null) { + return (T) o; + } + } + ctx = ctx.getParent(); + } while (ctx != null); + TargetException e = new TargetException("Target reference not found"); + e.setIdentifier(targetQualifiedName.getQualifiedName()); + throw e; + } + } + +} |