sampletreecontentprovider.java

来自「一些介绍J2ME的经典源码,对于在手机上开发应用很有帮助」· Java 代码 · 共 52 行

package treeviewersample.views;

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

public class SampleTreeContentProvider implements ITreeContentProvider {

	private static final Object[] EMPTY_ARRAY = null;

	public void dispose() {
	}

	public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
	}

	public Object[] getChildren(Object arg0) {

		if(arg0 instanceof NBATeamNode) {
			NBATeamNode node = (NBATeamNode)arg0;
			return concat(node.getteams().toArray(),node.getplayers().toArray());
		}
		return EMPTY_ARRAY;
	}
	
	protected Object[] concat(Object[] object, Object[] more) {
		Object[] both = new Object[object.length + more.length];
		System.arraycopy(object, 0, both, 0, object.length);
		System.arraycopy(more, 0, both, object.length, more.length);	
		return both;
	}
	
	public Object getParent(Object arg0) {
		return ((NBATeamNode) arg0).getParent();
	}

	public boolean hasChildren(Object arg0) {
		
		Object[] object = getChildren(arg0);
		if (object == null){
			return false;
		}else{
			return object.length>0;
		}
	}
	
	public Object[] getElements(Object arg0) {
		return getChildren(arg0);
	      
	}

}