addbuilderaction.java

基于eclipse的工具开发代码

package com.cownew.uidesigner.builder;

import java.util.Iterator;

import org.eclipse.core.resources.ICommand;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

import com.cownew.uidesigner.Activator;

public class AddBuilderAction implements IObjectActionDelegate
{

	private ISelection selection;

	public void run(IAction action)
	{
		if (selection instanceof IStructuredSelection)
		{
			for (Iterator it = ((IStructuredSelection) selection).iterator(); it
					.hasNext();)
			{
				Object element = it.next();
				IProject project = null;
				if (element instanceof IProject)
				{
					project = (IProject) element;
				} else if (element instanceof IAdaptable)
				{
					project = (IProject) ((IAdaptable) element)
							.getAdapter(IProject.class);
				}
				if (project != null)
				{
					addUIBuilder(project);
				}
			}
		}
	}

	public void selectionChanged(IAction action, ISelection selection)
	{
		this.selection = selection;
	}

	public void setActivePart(IAction action, IWorkbenchPart targetPart)
	{
	}

	private void addUIBuilder(IProject project)
	{
		try
		{
			//得到项目描述
			IProjectDescription desc = project.getDescription();
			//得到项目所有的构建器
			ICommand[] commands = desc.getBuildSpec();

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

			ICommand[] newCommands = new ICommand[commands.length + 1];
			System.arraycopy(commands, 0, newCommands, 0, commands.length);
			//新建一个构建器
			ICommand command = desc.newCommand();
			command.setBuilderName(UIBuilder.BUILDER_ID);
			newCommands[newCommands.length - 1] = command;
			//将新设置的构建器添加进去
			desc.setBuildSpec(newCommands);
			project.setDescription(desc, null);
		} catch (CoreException e)
		{
			Activator.logException(e);
		}
	}

}