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Diffstat (limited to 'sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java')
-rw-r--r-- | sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java b/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java new file mode 100644 index 0000000000..e17dd176a6 --- /dev/null +++ b/sca-java-2.x/branches/2.0/modules/contribution/src/main/java/org/apache/tuscany/sca/contribution/resolver/DefaultDelegatingModelResolver.java @@ -0,0 +1,69 @@ +/* + * 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.contribution.resolver; + +import java.util.List; + +import org.apache.tuscany.sca.assembly.Base; +import org.apache.tuscany.sca.contribution.processor.ProcessorContext; + +/** + * A model resolver implementation that delegates to a list of model resolvers. + * + * @version $Rev$ $Date$ + */ +public class DefaultDelegatingModelResolver implements ModelResolver { + + private List<ModelResolver> resolvers; + + public DefaultDelegatingModelResolver(List<ModelResolver> resolvers) { + this.resolvers = resolvers; + } + + public void addModel(Object resolved, ProcessorContext context) { + throw new IllegalStateException(); + } + + public Object removeModel(Object resolved, ProcessorContext context) { + throw new IllegalStateException(); + } + + public <T> T resolveModel(Class<T> modelClass, T unresolved, ProcessorContext context) { + + //TODO optimize and cache results of the resolution later + + // Go over all resolvers + for (ModelResolver resolver: resolvers) { + + Object resolved = resolver.resolveModel(modelClass, unresolved, context); + + // Return the resolved model object + if (resolved instanceof Base) { + if (!((Base)resolved).isUnresolved()) { + return modelClass.cast(resolved); + } + } + } + + // Model object was not resolved + return unresolved; + } + +} |