org.eclipse.m2e.core.internal.embedder.MavenProjectMutableState.java Source code

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Here is the source code for org.eclipse.m2e.core.internal.embedder.MavenProjectMutableState.java

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/*******************************************************************************
 * Copyright (c) 2011 Sonatype, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *      Sonatype, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.m2e.core.internal.embedder;

import java.util.ArrayList;
import java.util.List;
import java.util.Properties;

import org.apache.maven.model.Resource;
import org.apache.maven.project.MavenProject;

public class MavenProjectMutableState {

    private static final String CTX_SNAPSHOT = MavenProjectMutableState.class.getName() + "/SNAPSHOT";

    private List<String> compileSourceRoots;

    private List<String> testCompileSourceRoots;

    private List<Resource> resources;

    private List<Resource> testResources;

    private Properties properties;

    private boolean nested = true;

    private MavenProjectMutableState() {
    }

    public static MavenProjectMutableState takeSnapshot(MavenProject project) {
        MavenProjectMutableState snapshot = new MavenProjectMutableState();

        if (project.getContextValue(CTX_SNAPSHOT) == null) {
            snapshot.compileSourceRoots = new ArrayList<String>(project.getCompileSourceRoots());
            snapshot.testCompileSourceRoots = new ArrayList<String>(project.getTestCompileSourceRoots());
            snapshot.resources = new ArrayList<Resource>(project.getResources());
            snapshot.testResources = new ArrayList<Resource>(project.getTestResources());

            snapshot.properties = new Properties();
            snapshot.properties.putAll(project.getProperties());

            project.setContextValue(CTX_SNAPSHOT, Boolean.TRUE);
            snapshot.nested = false;
        }

        return snapshot;
    }

    public void restore(MavenProject project) {
        if (nested) {
            return;
        }

        setElements(project.getCompileSourceRoots(), compileSourceRoots);
        setElements(project.getTestCompileSourceRoots(), testCompileSourceRoots);
        setElements(project.getResources(), resources);
        setElements(project.getTestResources(), testResources);

        if (properties != null) {
            project.getProperties().clear();
            project.getProperties().putAll(properties);
        }

        project.setContextValue(CTX_SNAPSHOT, null);
    }

    private <T> void setElements(List<T> collection, List<T> elements) {
        if (elements != null) {
            collection.clear();
            collection.addAll(elements);
        }
    }

}