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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.workspace.builder.impl;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.apache.tuscany.sca.assembly.builder.Problem;
import org.apache.tuscany.sca.assembly.builder.Problem.Severity;
import org.apache.tuscany.sca.assembly.builder.impl.ProblemImpl;
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.workspace.Workspace;
import org.apache.tuscany.sca.workspace.builder.ContributionDependencyBuilder;
import org.apache.tuscany.sca.workspace.builder.ContributionDependencyBuilderMonitor;
/**
* A contribution dependency builder.
*
* @version $Rev$ $Date$
*/
public class ContributionDependencyBuilderImpl implements ContributionDependencyBuilder {
private final static Logger logger = Logger.getLogger(ContributionDependencyBuilderImpl.class.getName());
private ContributionDependencyBuilderMonitor monitor;
/**
* Constructs a new ContributionDependencyBuilder.
*/
public ContributionDependencyBuilderImpl(ContributionDependencyBuilderMonitor monitor) {
if (monitor == null) {
// Create a default monitor that logs using the JDK logger.
monitor = new ContributionDependencyBuilderMonitor() {
public void problem(Problem problem) {
if (problem.getSeverity() == Severity.INFO) {
logger.info(problem.toString());
} else if (problem.getSeverity() == Severity.WARNING) {
logger.warning(problem.toString());
} else if (problem.getSeverity() == Severity.ERROR) {
if (problem.getCause() != null) {
logger.log(Level.SEVERE, problem.toString(), problem.getCause());
} else {
logger.severe(problem.toString());
}
}
}
};
}
this.monitor = monitor;
}
/**
* Calculate the set of contributions that a contribution depends on.
* @param workspace
* @param contribution
* @return
*/
public List<Contribution> buildContributionDependencies(Workspace workspace, Contribution contribution) {
List<Contribution> dependencies = new ArrayList<Contribution>();
Set<Contribution> set = new HashSet<Contribution>();
dependencies.add(contribution);
set.add(contribution);
addContributionDependencies(workspace, contribution, dependencies, set);
Collections.reverse(dependencies);
return dependencies;
}
/**
* Analyze a contribution and add its dependencies to the given dependency set.
* @param workspace
* @param contribution
* @param dependencies
* @param set
*/
private void addContributionDependencies(Workspace workspace, Contribution contribution, List<Contribution> dependencies, Set<Contribution> set) {
// Go through the contribution imports
for (Import import_: contribution.getImports()) {
boolean resolved = false;
// Go through all contribution candidates and their exports
for (Contribution dependency: workspace.getContributions()) {
for (Export export: dependency.getExports()) {
// If an export from a contribution matches the import in hand
// add that contribution to the dependency set
if (import_.match(export)) {
resolved = true;
if (!set.contains(dependency)) {
set.add(dependency);
dependencies.add(dependency);
// Now add the dependencies of that contribution
addContributionDependencies(workspace, dependency, dependencies, set);
}
}
}
}
if (!resolved) {
// Record import resolution issue
monitor.problem(new ProblemImpl(Severity.WARNING, "Unresolved import", import_));
}
}
}
}
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