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/*
 * Copyright 2011 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.internal.GradleInternal;
import org.gradle.api.internal.SettingsInternal;
import org.gradle.api.internal.initialization.ClassLoaderScope;
import org.gradle.api.internal.project.ProjectInternal;
import org.gradle.api.internal.project.ProjectState;
import org.gradle.internal.build.BuildState;

public class InstantiatingBuildLoader implements BuildLoader {
    @Override
    public void load(SettingsInternal settings, GradleInternal gradle) {
        createProjects(gradle, settings.getProjectRegistry().getRootProject());
        attachDefaultProject(gradle, settings.getDefaultProject());
    }

    private void attachDefaultProject(GradleInternal gradle, DefaultProjectDescriptor defaultProjectDescriptor) {
        ProjectState defaultProject = gradle.getOwner().getProjects().getProject(defaultProjectDescriptor.path());
        gradle.setDefaultProject(defaultProject.getMutableModel());
    }

    private void createProjects(GradleInternal gradle, DefaultProjectDescriptor rootProjectDescriptor) {
        ClassLoaderScope baseProjectClassLoaderScope = gradle.baseProjectClassLoaderScope();
        ClassLoaderScope rootProjectClassLoaderScope = baseProjectClassLoaderScope.createChild("root-project[" + gradle.getIdentityPath() + "]", null);

        ProjectState projectState = gradle.getOwner().getProjects().getProject(rootProjectDescriptor.path());
        projectState.createMutableModel(rootProjectClassLoaderScope, baseProjectClassLoaderScope);
        ProjectInternal rootProject = projectState.getMutableModel();
        gradle.setRootProject(rootProject);

        createChildProjectsRecursively(gradle.getOwner(), rootProjectDescriptor, rootProjectClassLoaderScope, baseProjectClassLoaderScope);
    }

    private void createChildProjectsRecursively(BuildState owner, DefaultProjectDescriptor parentProjectDescriptor, ClassLoaderScope parentProjectClassLoaderScope, ClassLoaderScope baseProjectClassLoaderScope) {
        for (DefaultProjectDescriptor childProjectDescriptor : parentProjectDescriptor.children()) {
            ClassLoaderScope childProjectClassLoaderScope = parentProjectClassLoaderScope.createChild("project-" + childProjectDescriptor.getName(), null);
            ProjectState projectState = owner.getProjects().getProject(childProjectDescriptor.path());
            projectState.createMutableModel(childProjectClassLoaderScope, baseProjectClassLoaderScope);
            createChildProjectsRecursively(owner, childProjectDescriptor, childProjectClassLoaderScope, baseProjectClassLoaderScope);
        }
    }
}