org.eclipse.pde/src/org/eclipse/pde/internal/BaseProject.java

/*******************************************************************************
 * Copyright (c) 2000, 2003 IBM Corporation and others.
 * 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:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.pde.internal;

import org.eclipse.core.resources.*;
import org.eclipse.core.runtime.*;
/**
 */
public abstract class BaseProject extends PlatformObject implements IProjectNature {
	private IProject project;

public BaseProject() {
	super();
}

protected void addToBuildSpec(String builderID) throws CoreException {

	IProjectDescription description = getProject().getDescription();
	ICommand builderCommand = getBuilderCommand(description, builderID);

	if (builderCommand == null) {
		// Add a new build spec
		ICommand command = description.newCommand();
		command.setBuilderName(builderID);
		setBuilderCommand(description, command);
	}
}

private ICommand getBuilderCommand(
	IProjectDescription description,
	String builderId)
	throws CoreException {
	ICommand[] commands = description.getBuildSpec();
	for (int i = 0; i < commands.length; ++i) {
		if (commands[i].getBuilderName().equals(builderId)) {
			return commands[i];
		}
	}
	return null;
}

public IProject getProject() {
	return project;
}

protected IWorkspace getWorkspace() {
	return PDE.getWorkspace();
}

protected void removeFromBuildSpec(String builderID) throws CoreException {
	IProjectDescription description = getProject().getDescription();
	ICommand[] commands = description.getBuildSpec();
	for (int i = 0; i < commands.length; ++i) {
		if (commands[i].getBuilderName().equals(builderID)) {
			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;
		}
	}
}

private void setBuilderCommand(
	IProjectDescription description,
	ICommand newCommand)
	throws CoreException {

	ICommand[] oldCommands = description.getBuildSpec();
	ICommand oldBuilderCommand =
		getBuilderCommand(description, newCommand.getBuilderName());

	ICommand[] newCommands;

	if (oldBuilderCommand == null) {
		// Add a build spec after other builders
		newCommands = new ICommand[oldCommands.length + 1];
		System.arraycopy(oldCommands, 0, newCommands, 0, oldCommands.length);
		newCommands[oldCommands.length] = newCommand;
	} else {
		for (int i = 0, max = oldCommands.length; i < max; i++) {
			if (oldCommands[i] == oldBuilderCommand) {
				oldCommands[i] = newCommand;
				break;
			}
		}
		newCommands = oldCommands;
	}

	// Commit the spec change into the project
	description.setBuildSpec(newCommands);
	getProject().setDescription(description, null);
}

public void setProject(IProject project) {
	this.project = project;
}
}