/*
 * Copyright 2016 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.api.internal.artifacts.ivyservice.projectmodule;

import org.gradle.api.Transformer;
import org.gradle.api.artifacts.component.ProjectComponentIdentifier;
import org.gradle.internal.component.local.model.DefaultProjectComponentIdentifier;
import org.gradle.internal.service.ServiceRegistry;

import java.io.File;
import java.util.List;

public class CompositeProjectDirectoryMapper implements Transformer<File, String> {
    private final CompositeProjectComponentRegistry discovered;

    public CompositeProjectDirectoryMapper(ServiceRegistry services) {
        List<CompositeProjectComponentRegistry> registries = services.getAll(CompositeProjectComponentRegistry.class);
        if (!registries.isEmpty()) {
            discovered = registries.iterator().next();
        } else {
            discovered = null;
        }
    }

    @Override
    public File transform(String projectPath) {
        if (discovered == null) {
            throw new IllegalStateException("Not a composite");
        }
        ProjectComponentIdentifier projectComponentIdentifier = DefaultProjectComponentIdentifier.newId(projectPath);
        return discovered.getProjectDirectory(projectComponentIdentifier);
    }
}
