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/*
* 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.resource.impl;
import org.apache.tuscany.sca.contribution.Contribution;
import org.apache.tuscany.sca.contribution.Export;
import org.apache.tuscany.sca.contribution.Import;
import org.apache.tuscany.sca.contribution.resolver.DefaultImportAllModelResolver;
import org.apache.tuscany.sca.contribution.resource.ResourceExport;
import org.apache.tuscany.sca.contribution.resource.ResourceImport;
import org.apache.tuscany.sca.contribution.service.ContributionListener;
import org.apache.tuscany.sca.contribution.service.ContributionRepository;
/**
* Resource Import/Export contribution listener
* The listener would process all import/export from a given contribution
* and initialize the model resolvers properly
*
* @version $Rev$ $Date$
*/
public class ResourceImportExportListener implements ContributionListener {
/**
* Initialize the import/export model resolvers
* Export model resolvers are same as Contribution model resolver
* Import model resolvers are matched to a specific contribution if a location URI is specified,
* otherwise it try to resolve against all the other contributions
* Also set the exporting contributions used by contribution ClassLoaders to
* match import/export for class loading.
*/
public void contributionAdded(ContributionRepository repository, Contribution contribution) {
// Initialize the contribution exports
for (Export export: contribution.getExports()) {
export.setModelResolver(contribution.getModelResolver());
}
// Initialize the contribution imports
for (Import import_: contribution.getImports()) {
boolean initialized = false;
if (import_ instanceof ResourceImport) {
ResourceImport resourceImport = (ResourceImport)import_;
// Find a matching contribution
if (resourceImport.getLocation() != null) {
Contribution targetContribution = repository.getContribution(resourceImport.getLocation());
if (targetContribution != null) {
// Find a matching contribution export
for (Export export: targetContribution.getExports()) {
if (export instanceof ResourceExport) {
ResourceExport resourceExport = (ResourceExport)export;
if (resourceImport.getURI().equals(resourceExport.getURI())) {
resourceImport.setModelResolver(resourceExport.getModelResolver());
initialized = true;
break;
}
}
}
}
}
//if no location was specified, try to resolve with any contribution
if( !initialized ) {
// Use a resolver that will consider all contributions
import_.setModelResolver(new DefaultImportAllModelResolver(import_, repository.getContributions()));
}
}
}
}
public void contributionRemoved(ContributionRepository repository, Contribution contribution) {
}
public void contributionUpdated(ContributionRepository repository, Contribution oldContribution, Contribution contribution) {
}
}
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