uibuilder.java

来自「基于eclipse的工具开发代码」· Java 代码 · 共 122 行

package com.cownew.uidesigner.builder;

import java.util.Map;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceDelta;
import org.eclipse.core.resources.IResourceDeltaVisitor;
import org.eclipse.core.resources.IResourceVisitor;
import org.eclipse.core.resources.IncrementalProjectBuilder;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;

public class UIBuilder extends IncrementalProjectBuilder
{
	// BuilderId比较奇怪，它是由“插件id”+“.”+“构建器id”组成的
	public static final String BUILDER_ID = "com.cownew.uidesigner.UIBuilder";

	protected IProject[] build(int kind, Map args, IProgressMonitor monitor)
			throws CoreException
	{
		if (kind == FULL_BUILD)
		{
			fullBuild(monitor);
		} else
		{
			IResourceDelta delta = getDelta(getProject());
			if (delta == null)
			{
				fullBuild(monitor);
			} else
			{
				incrementalBuild(delta, monitor);
			}
		}
		return null;
	}

	private void fullBuild(final IProgressMonitor monitor) throws CoreException
	{
		getProject().accept(new UIFullBuildVisitor(monitor));
	}

	private void incrementalBuild(IResourceDelta delta, IProgressMonitor monitor)
			throws CoreException
	{
		delta.accept(new UIDeltaVisitor(monitor));
	}
}

class UIDeltaVisitor implements IResourceDeltaVisitor
{
	private IProgressMonitor monitor;

	public UIDeltaVisitor(IProgressMonitor monitor)
	{
		this.monitor = monitor;
	}

	public boolean visit(IResourceDelta delta) throws CoreException
	{
		IResource resource = delta.getResource();

		if (!(resource instanceof IFile))
		{
			// 返回值表示是否继续遍历
			return true;
		}

		String ext = resource.getFileExtension();
		if (!ext.equalsIgnoreCase("ui"))
		{
			return true;
		}

		IFile file = (IFile) resource;
		switch (delta.getKind())
		{
		// 增加了一个AUI文件
		case IResourceDelta.ADDED:
			BuilderUtils.buildUI(file, monitor);
			break;
		// AUI文件被删除
		case IResourceDelta.REMOVED:
			BuilderUtils.deleteJava(file, monitor);
			break;
		// AUI文件被编辑
		case IResourceDelta.CHANGED:
			BuilderUtils.buildUI(file, monitor);
			break;
		}
		return true;
	}
}

class UIFullBuildVisitor implements IResourceVisitor
{
	private IProgressMonitor monitor;

	public UIFullBuildVisitor(IProgressMonitor monitor)
	{
		this.monitor = monitor;
	}

	public boolean visit(IResource resource)
	{
		if (!(resource instanceof IFile))
		{
			return true;
		}

		String ext = resource.getFileExtension();
		if (!ext.equalsIgnoreCase("ui"))
		{
			return true;
		}
		BuilderUtils.buildUI((IFile) resource, monitor);
		return true;
	}
}