gistfile1.txt

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 List<String> compileSourceRoots;

  private List<String> testCompileSourceRoots;

  private List<Resource> resources;

  private List<Resource> testResources;

  private Properties properties = new Properties();

  private MavenProjectMutableState() {
  }

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

    return snapshot;
  }

  public void restore(MavenProject project) {
    setElements(project.getCompileSourceRoots(), compileSourceRoots);
    setElements(project.getTestCompileSourceRoots(), testCompileSourceRoots);
    setElements(project.getResources(), resources);
    setElements(project.getTestResources(), testResources);

    project.getProperties().clear();
    project.getProperties().putAll(properties);
  }

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

}