AguiNature.java

package thahn.java.agui.ide.eclipse.project;

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;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;

import thahn.java.agui.ide.eclipse.build.builder.ResourceBuilder;

public class AguiNature implements IProjectNature {

	/**
	 * ID of this project nature
	 */
	public static final String NATURE_ID = "thahn.java.agui.ide.eclipse.wizard.AguiNature";

	private IProject project;

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#configure()
	 */
	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(ResourceBuilder.BUILDER_ID)) {
				return;
			}
		}

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

	public static void configureBuilder(IProject project) throws CoreException {
		IProjectDescription desc = project.getDescription();
		ICommand[] commands = desc.getBuildSpec();

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

		ICommand[] newCommands = new ICommand[commands.length + 1];
		System.arraycopy(commands, 0, newCommands, 0, commands.length);
		ICommand command = desc.newCommand();
		command.setBuilderName(ResourceBuilder.BUILDER_ID);
		newCommands[newCommands.length - 1] = command;
		desc.setBuildSpec(newCommands);
		project.setDescription(desc, null);
	}
	
	public static void addNatureToProjectDescription(IProject project,
            String natureId, IProgressMonitor monitor) throws CoreException {
        if (!project.hasNature(natureId)) {
            IProjectDescription description = project.getDescription();
            String[] natures = description.getNatureIds();
            String[] newNatures = new String[natures.length + 1];

            // Android natures always come first.
            if (natureId.equals(AguiNature.NATURE_ID)) {
                System.arraycopy(natures, 0, newNatures, 1, natures.length);
                newNatures[0] = natureId;
            } else {
                System.arraycopy(natures, 0, newNatures, 0, natures.length);
                newNatures[natures.length] = natureId;
            }

            description.setNatureIds(newNatures);
            project.setDescription(description, new SubProgressMonitor(monitor, 10)); // (FORCE, KEEP_HISTORY and AVOID_NATURE_CONFIG)
        }
    }

	
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#deconfigure()
	 */
	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(ResourceBuilder.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);
				project.setDescription(description, null);			
				return;
			}
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#getProject()
	 */
	public IProject getProject() {
		return project;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.resources.IProjectNature#setProject(org.eclipse.core.resources.IProject)
	 */
	public void setProject(IProject project) {
		this.project = project;
	}
	
	public static boolean checkAguiProject(IProject project) {
		try {
			return project.hasNature(AguiNature.NATURE_ID);
		} catch (CoreException e) {
			e.printStackTrace();
		}
		return false;
	}
}