filetreecontentprovider.java

用java 实现的IE browser适合于学者

/*
 * Created on 2005-1-4
 *
 * TODO To change the template for this generated file go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
package com.hnjchina.createview;

import java.io.File;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

/**
 * @author limeiyong
 *
 * TODO To change the template for this generated type comment go to
 * Window - Preferences - Java - Code Style - Code Templates
 */
public class FileTreeContentProvider implements ITreeContentProvider {

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getChildren(java.lang.Object)
	 */
	public Object[] getChildren(Object parentElement) {
//		 Return the files and subdirectories in this directory
	    return ((File) parentElement).listFiles();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#getParent(java.lang.Object)
	 */
	public Object getParent(Object element) {
//		 Return this file's parent file
	    return ((File) element).getParentFile();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.ITreeContentProvider#hasChildren(java.lang.Object)
	 */
	public boolean hasChildren(Object element) {
//		 Get the children
	    Object[] obj = getChildren(element);
	    // Return whether the parent has children
	    return obj == null ? false : obj.length > 0;
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IStructuredContentProvider#getElements(java.lang.Object)
	 */
	public Object[] getElements(Object inputElement) {
//		 These are the root elements of the tree
	    // We don't care what arg0 is, because we just want all
	    // the root nodes in the file system
	    return File.listRoots();
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IContentProvider#dispose()
	 */
	public void dispose() {
		// TODO Auto-generated method stub
		
	}

	/* (non-Javadoc)
	 * @see org.eclipse.jface.viewers.IContentProvider#inputChanged(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object)
	 */
	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
		// TODO Auto-generated method stub
		
	}

}