/*
* Copyright 2009 the original author or authors.
*
* 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.gradle.initialization;
import org.gradle.api.InvalidUserDataException;
import org.gradle.api.internal.project.ProjectIdentifier;
import org.gradle.api.internal.project.ProjectRegistry;
import java.util.ArrayList;
import java.util.List;
public abstract class AbstractProjectSpec implements ProjectSpec {
public boolean containsProject(ProjectRegistry<? extends ProjectIdentifier> registry) {
checkPreconditions(registry);
List<ProjectIdentifier> matches = new ArrayList<ProjectIdentifier>();
select(registry, matches);
return !matches.isEmpty();
}
public <T extends ProjectIdentifier> T selectProject(ProjectRegistry<? extends T> registry) {
checkPreconditions(registry);
List<T> matches = new ArrayList<T>();
select(registry, matches);
if (matches.isEmpty()) {
throw new InvalidUserDataException(formatNoMatchesMessage());
}
if (matches.size() != 1) {
throw new InvalidUserDataException(formatMultipleMatchesMessage(matches));
}
return matches.get(0);
}
protected void checkPreconditions(ProjectRegistry<?> registry) {
}
protected abstract String formatMultipleMatchesMessage(Iterable<? extends ProjectIdentifier> matches);
protected abstract String formatNoMatchesMessage();
protected abstract <T extends ProjectIdentifier> void select(ProjectRegistry<? extends T> candidates, List<? super T> matches);
}