org.apache.click.eclipse/src/org/apache/click/eclipse/core/builder/ClickProjectNature.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.click.eclipse.core.builder;


import org.apache.click.eclipse.ClickPlugin;
import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IProjectNature;
import org.eclipse.core.runtime.CoreException;

/**
 * The project nature for the Click project.
 * <p>
 * This nature enables <code>ClickProjectBuilder</code> for the project.
 * 
 * @author Naoki Takezoe
 * @see ClickProjectBuilder
 */
public class ClickProjectNature implements IProjectNature {
	
	public static final String NATURE_ID = "org.apache.click.eclipse.ClickProjectNature";
	
	private IProject project;
	
	/**
	 * Adds the <code>ClickProjectBuilder</code> to the project.
	 */
	public void configure() throws CoreException {
		IProjectDescription desc = project.getDescription();
		ICommand[] commands = desc.getBuildSpec();

		for (int i = 0; i < commands.length; ++i) {
			if (commands[i].getBuilderName().equals(ClickProjectBuilder.BUILDER_ID)) {
				return;
			}
		}

		ICommand[] newCommands = new ICommand[commands.length + 1];
		System.arraycopy(commands, 0, newCommands, 0, commands.length);
		ICommand command = desc.newCommand();
		command.setBuilderName(ClickProjectBuilder.BUILDER_ID);
		newCommands[newCommands.length - 1] = command;
		desc.setBuildSpec(newCommands);
		project.setDescription(desc, null);
	}

	/**
	 * Removes the <code>ClickProjectBuilder</code> from the project.
	 */
	public void deconfigure() throws CoreException {
		IProjectDescription description = getProject().getDescription();
		ICommand[] commands = description.getBuildSpec();
		for (int i = 0; i < commands.length; ++i) {
			if (commands[i].getBuilderName().equals(ClickProjectBuilder.BUILDER_ID)) {
				ICommand[] newCommands = new ICommand[commands.length - 1];
				System.arraycopy(commands, 0, newCommands, 0, i);
				System.arraycopy(commands, i + 1, newCommands, i,
						commands.length - i - 1);
				description.setBuildSpec(newCommands);
				return;
			}
		}
	}

	public IProject getProject() {
		return project;
	}

	public void setProject(IProject project) {
		this.project = project;
	}
	
	/**
	 * Adds the <code>ClickProjectNature</code> to the given project.
	 * 
	 * @param project the project
	 */
	public static void addNatute(IProject project) {
		try {
			IProjectDescription description = project.getDescription();
			String[] natures = description.getNatureIds();
			
			// Add the nature
			String[] newNatures = new String[natures.length + 1];
			System.arraycopy(natures, 0, newNatures, 0, natures.length);
			newNatures[natures.length] = ClickProjectNature.NATURE_ID;
			description.setNatureIds(newNatures);
			project.setDescription(description, null);
			
		} catch(CoreException e){
			ClickPlugin.log(e);
		}
	}
	
	/**
	 * Removes the <code>ClickProjectNature</code> from the given project.
	 * 
	 * @param project the project
	 */
	public static void removeNature(IProject project){
		try {
			IProjectDescription description = project.getDescription();
			String[] natures = description.getNatureIds();

			for (int i = 0; i < natures.length; ++i) {
				if (ClickProjectNature.NATURE_ID.equals(natures[i])) {
					// Remove the nature
					String[] newNatures = new String[natures.length - 1];
					System.arraycopy(natures, 0, newNatures, 0, i);
					System.arraycopy(natures, i + 1, newNatures, i,
							natures.length - i - 1);
					description.setNatureIds(newNatures);
					project.setDescription(description, null);
					return;
				}
			}
		} catch (CoreException e) {
			ClickPlugin.log(e);
		}
	}

}