ResourceBuilder.java

package thahn.java.agui.ide.eclipse.build.builder;

import java.io.BufferedInputStream;
import java.io.IOException;
import java.nio.file.CopyOption;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Map;

import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParser;
import javax.xml.parsers.SAXParserFactory;

import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IMarker;
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.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;
import org.eclipse.core.runtime.jobs.Job;
import org.xml.sax.SAXException;
import org.xml.sax.SAXParseException;
import org.xml.sax.helpers.DefaultHandler;

import thahn.java.agui.ide.eclipse.preferences.AguiPrefs;
import thahn.java.agui.ide.eclipse.project.AguiConstants;
import thahn.java.agui.ide.eclipse.project.AguiProjectInfo;
import thahn.java.agui.ide.eclipse.project.BaseProjectHelper;
import thahn.java.agui.ide.eclipse.wizard.AguiPlugin;
import thahn.java.agui.ide.eclipse.wizard.AguiProjectMaker;
import thahn.java.agui.ide.eclipse.wizard.template.ResourceIndicator;
import thahn.java.agui.res.RBuilder;
import thahn.java.agui.res.RMaker;
import thahn.java.agui.res.ResourcesManager;

public class ResourceBuilder extends IncrementalProjectBuilder {

	public static final String 										TAG 	= "ResourceBuilder";
	
	class SampleDeltaVisitor implements IResourceDeltaVisitor {
		
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.core.resources.IResourceDeltaVisitor#visit(org.eclipse.core.resources.IResourceDelta)
		 */
		public boolean visit(IResourceDelta delta) throws CoreException {
			IResource resource = delta.getResource();
			switch (delta.getKind()) {
			case IResourceDelta.ADDED:
				// handle added resource
				checkXML(resource);
				break;
			case IResourceDelta.REMOVED:
				// handle removed resource
				break;
			case IResourceDelta.CHANGED:
				// handle changed resource
				checkXML(resource);
				break;
			}
			//return true to continue visiting children.
			return true;
		}
	}

	class SampleResourceVisitor implements IResourceVisitor {
		public boolean visit(IResource resource) {
			checkXML(resource);
			//return true to continue visiting children.
			return true;
		}
	}

	class XMLErrorHandler extends DefaultHandler {
		
		private IFile file;

		public XMLErrorHandler(IFile file) {
			this.file = file;
		}

		private void addMarker(SAXParseException e, int severity) {
			ResourceBuilder.this.addMarker(file, e.getMessage(), e
					.getLineNumber(), severity);
		}

		public void error(SAXParseException exception) throws SAXException {
			addMarker(exception, IMarker.SEVERITY_ERROR);
		}

		public void fatalError(SAXParseException exception) throws SAXException {
			addMarker(exception, IMarker.SEVERITY_ERROR);
		}

		public void warning(SAXParseException exception) throws SAXException {
			addMarker(exception, IMarker.SEVERITY_WARNING);
		}
	}

	public static final String BUILDER_ID = "thahn.java.agui.ide.eclipse.wizard.ResourceBuilder";

	private static final String MARKER_TYPE = "thahn.java.agui.ide.eclipse.wizard.xmlProblem";

	private SAXParserFactory parserFactory;

	private void addMarker(IFile file, String message, int lineNumber,
			int severity) {
		try {
			IMarker marker = file.createMarker(MARKER_TYPE);
			marker.setAttribute(IMarker.MESSAGE, message);
			marker.setAttribute(IMarker.SEVERITY, severity);
			if (lineNumber == -1) {
				lineNumber = 1;
			}
			marker.setAttribute(IMarker.LINE_NUMBER, lineNumber);
		} catch (CoreException e) {
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.core.internal.events.InternalBuilder#build(int,
	 *      java.util.Map, org.eclipse.core.runtime.IProgressMonitor)
	 */
	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;
	}

	void checkXML(IResource resource) {
		if (resource instanceof IFile && resource.getName().endsWith(".xml")) {
			IFile file = (IFile) resource;
			deleteMarkers(file);
			XMLErrorHandler reporter = new XMLErrorHandler(file);
			try {
				getParser().parse(file.getContents(), reporter);
			} catch (Exception e1) {
			}
		}
	}

	private void deleteMarkers(IFile file) {
		try {
			file.deleteMarkers(MARKER_TYPE, false, IResource.DEPTH_ZERO);
		} catch (CoreException ce) {
		}
	}

	protected void fullBuild(final IProgressMonitor monitor)
			throws CoreException {
		try {
			getProject().accept(new SampleResourceVisitor());
		} catch (CoreException e) {
		}
	}
	
	private SAXParser getParser() throws ParserConfigurationException,
			SAXException {
		if (parserFactory == null) {
			parserFactory = SAXParserFactory.newInstance();
		}
		return parserFactory.newSAXParser();
	}

	protected void incrementalBuild(IResourceDelta delta,
			IProgressMonitor monitor) throws CoreException {
		// the visitor does the work.
		delta.accept(new SampleDeltaVisitor());
		final IProject project = delta.getResource().getProject();
		if (BaseProjectHelper.isAguiProject(project)) {
			// get AguiManifest info
			AguiProjectInfo aguiInfo = BaseProjectHelper.getAguiProjectInfo(project);
			// BuildConfig.java
			AguiProjectMaker maker = new AguiProjectMaker(aguiInfo.projectName, aguiInfo.packageName, aguiInfo.mainActivityName);
			try (BufferedInputStream buildConfigBis = new BufferedInputStream(maker.copyTemplate("BuildConfigTemplate.txt"))) {
				Files.copy(buildConfigBis, Paths.get(aguiInfo.projectPath, "gen"
						, aguiInfo.packageName.replace(".", "/"), AguiConstants.BUILD_CONFIG_JAVA)
						, new CopyOption[] { StandardCopyOption.REPLACE_EXISTING });
			} catch (IOException e) {
				e.printStackTrace();
				AguiPlugin.displayError("Build Error", e.getMessage());
			}
			// R.java
			String aguiCorePackageName = thahn.java.agui.Main.class.getPackage().getName();
			String aguiCorePath = AguiPrefs.getInstance().getSdkJarLocation();
			// prepare resource container like enum resource, etc.. 
			RMaker coreRMaker = new RMaker(true, aguiCorePackageName, aguiCorePath, aguiCorePath, aguiCorePath
					, ResourcesManager.getInstance(), aguiCorePackageName);
			coreRMaker.parse();
			// make R.java
			RBuilder rBuilder = new RBuilder(aguiCorePackageName, aguiCorePath, aguiInfo.packageName, aguiInfo.projectPath);
			rBuilder.parse();
			// refresh
			IFolder genFolder = project.getFolder(AguiConstants.FD_GEN);
            genFolder.refreshLocal(IResource.DEPTH_INFINITE, new SubProgressMonitor(monitor, 10));
		}
	}
	
	protected void launchJob(Job newJob) {
        newJob.setPriority(Job.BUILD);
        newJob.setRule(ResourcesPlugin.getWorkspace().getRoot());
        newJob.schedule();
    }

	@Override
	protected void clean(IProgressMonitor monitor) throws CoreException {
		super.clean(monitor);
		IProject project = getProject();
		IFolder genFolder = project.getFolder(AguiConstants.FD_GEN);
		if (genFolder.exists()) {
			for(IResource res : genFolder.members()) {
				if (res.exists())
					res.delete(true, new SubProgressMonitor(monitor, 10));
			}
		}
	}
}