hibernatecfeditor.java

eclipse的hibernate插件,支持eclipse2.*版本

package com.tanghan.plugin.hibernate.editor;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.UnsupportedEncodingException;

import org.apache.log4j.Logger;
import org.eclipse.core.resources.IFile;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceChangeEvent;
import org.eclipse.core.resources.IResourceChangeListener;
import org.eclipse.core.resources.IWorkspace;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;
import org.eclipse.pde.core.IEditable;
import org.eclipse.pde.core.IModel;
import org.eclipse.pde.internal.core.IModelProvider;
import org.eclipse.pde.internal.ui.editor.IPDEEditorPage;
import org.eclipse.pde.internal.ui.editor.PDEMultiPageXMLEditor;

import com.tanghan.plugin.TanghanPlugin;
import com.tanghan.plugin.hibernate.editor.formpages.HibernateCFFormPage;
import com.tanghan.plugin.hibernate.editor.formpages.HibernateCFSourcePage;
import com.tanghan.util.Log;



/**
 * 用户修改Hibernate的值对象配置文件的编辑器
 * @author Jerry Tang
 * @version v0.1.0
 * @createdate 2003-3-25
 * @copyright  (C) 2003 Tanghan工作组
 * 
 * @see PDEMultiPageXMLEditor
 */
public class HibernateCFEditor extends PDEMultiPageXMLEditor  
			implements IPropertyChangeListener, IResourceChangeListener  {

	private static Logger log = Log.getInstanse().getLogger(HibernateCFEditor.class);
	
	private IProject project;
	/**Model 提供商*/
	private IModelProvider modelProvider;

	public static final String SOURCE_PAGE = "SourcePage";
	public static final String HIBERNATE_CONFIGFILE_PAGE = "HibernateConfigFilePage";
	public static final String HIBERNATE_CONFIGFILE_TITLE = "Hibernate Config File";
	
	
	public HibernateCFEditor() {
		super();		
		TanghanPlugin.getDefault().getPreferenceStore().addPropertyChangeListener(this);
		IWorkspace workspace = TanghanPlugin.getWorkspace();
		workspace.addResourceChangeListener(
			this,
			IResourceChangeEvent.PRE_CLOSE);
	}	
	
	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#createModel(java.lang.Object)
	 */
	protected Object createModel(Object input) throws CoreException {

		log.debug("createModel(Object input)");
		log.debug(input.getClass().getName());
		//根据系统传入的文件判断其应该怎么样作处理
		if(input!=null && input instanceof IFile){
			IFile file =(IFile)input;
			log.debug(file.getFullPath().toOSString());
			return createFileSystemModel((IFile) file);
		}
		return new HibernateCFModel();
	}

	private IHibernateCFModel createFileSystemModel(IFile file) throws CoreException {
		InputStream stream = null;
	
		if(!file.isSynchronized(IResource.DEPTH_ZERO)){
			file.refreshLocal(IResource.DEPTH_ZERO,null);
		}
		//得到该文件的项目
		project = file.getProject();
		//得到
		stream = file.getContents(false);	
							
		modelProvider = TanghanPlugin.getDefault().getHibernateCFModelManager();
		
		modelProvider.connect(file, this);

		IHibernateCFModel model =
			(IHibernateCFModel) modelProvider.getModel(file, this);
			
		model.load(stream,true);

		try {
			stream.close();
		} catch (IOException e) {
			log.debug(e.getMessage(),e);
		}
		//得到当前的Project
		if(file.getProject()!=null)
			model.setProject(file.getProject());
					
		return model;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#createPages()
	 */
	protected void createPages() {
		log.debug("add source page");
		this.firstPageId = HIBERNATE_CONFIGFILE_PAGE;
		formWorkbook.setFirstPageSelected(false);
		this.addPage(HIBERNATE_CONFIGFILE_PAGE,new HibernateCFFormPage(this,HIBERNATE_CONFIGFILE_TITLE));
		this.addPage(SOURCE_PAGE,new HibernateCFSourcePage(this));
		

	}

	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#getHomePage()
	 */
	public IPDEEditorPage getHomePage() {
		log.debug("getHomePage()");
		return this.getPage(HIBERNATE_CONFIGFILE_PAGE);
	}

	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#getSourcePageId()
	 */
	protected String getSourcePageId() {
		log.debug("getSourcePageId()");
		return SOURCE_PAGE;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#isModelDirty(java.lang.Object)
	 */
	protected boolean isModelDirty(Object model) {
		return model != null
			&& model instanceof IEditable
			&& model instanceof IModel
			&& ((IModel) model).isEditable()
			&& ((IEditable) model).isDirty();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.pde.internal.ui.editor.PDEMultiPageEditor#updateModel()
	 */
	protected boolean updateModel() {
		log.debug("updateModel()");
		IHibernateCFModel model = (IHibernateCFModel) getModel();
		IDocument document =
			getDocumentProvider().getDocument(getEditorInput());
		String text = document.get();
		boolean cleanModel = true;
		try {
			InputStream stream =
				new ByteArrayInputStream(text.getBytes("UTF8"));
			try {
				model.reload(stream, false);
			} catch (CoreException e) {
				e.printStackTrace();
				cleanModel = false;
			}
			try {
				stream.close();
			} catch (IOException e) {
				;
			}
		} catch (UnsupportedEncodingException e) {
			log.error(e.getMessage(),e);
		}
		return cleanModel;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.ui.IWorkbenchPart#dispose()
	 */
	public void dispose() {
		modelProvider.disconnect(getModel(), this);		
		IWorkspace workspace = TanghanPlugin.getWorkspace();
		workspace.removeResourceChangeListener(this);
		disposeSuperClass() ;
	}
	public final void disposeSuperClass() {
		super.dispose();
	}
	/* (non-Javadoc)
	 * @see org.eclipse.jface.util.IPropertyChangeListener#propertyChange(org.eclipse.jface.util.PropertyChangeEvent)
	 */
	public void propertyChange(PropertyChangeEvent event) {

	}

	/* (non-Javadoc)
	 * @see org.eclipse.core.resources.IResourceChangeListener#resourceChanged(org.eclipse.core.resources.IResourceChangeEvent)
	 */
	public void resourceChanged(IResourceChangeEvent event) {

	}

	/* （非 Javadoc）
	 * @see org.eclipse.ui.ISaveablePart#doSave(org.eclipse.core.runtime.IProgressMonitor)
	 */
	public void doSave(IProgressMonitor monitor) {
		super.doSave(monitor);
		IEditable editable = (IEditable)model;
		editable.setDirty(false);
		fireSaveNeeded();
	}

}