ServerEditorPageContentProvider.java

/*******************************************************************************
 * Copyright (c) 2009, 2012 SpringSource, a divison of VMware, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     SpringSource, a division of VMware, Inc. - initial API and implementation
 *******************************************************************************/

package org.eclipse.virgo.ide.runtime.ui;

import java.lang.reflect.Method;

import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.part.MultiPageEditorPart;
import org.eclipse.wst.server.ui.internal.editor.ServerEditor;

/**
 * Generic support for server pages. Should work with all WTP servers.
 *
 * @author Miles Parker
 */
@SuppressWarnings("restriction")
public class ServerEditorPageContentProvider implements ITreeContentProvider {

    private IEditorPart[] pageParts;

    private ServerEditor editor;

    public ServerEditorPageContentProvider() {
    }

    public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
        if (newInput instanceof ServerEditor) {
            this.editor = (ServerEditor) newInput;
            this.pageParts = new IEditorPart[getPageCount()];
            for (int i = 0; i < this.pageParts.length; i++) {
                this.pageParts[i] = getEditor(i);
            }
        }
    }

    public void dispose() {
    }

    public boolean hasChildren(Object element) {
        return element == this.editor && this.pageParts.length > 0;
    }

    public Object getParent(Object element) {
        for (IEditorPart part : this.pageParts) {
            if (part == element) {
                return this.editor;
            }
        }
        return null;
    }

    public Object[] getElements(Object inputElement) {
        if (inputElement == this.editor) {
            return this.pageParts;
        }
        return new Object[0];
    }

    public Object[] getChildren(Object parentElement) {
        if (parentElement == this.editor) {
            return this.pageParts;
        }
        return new Object[0];
    }

    public void removeListener(ILabelProviderListener listener) {
    }

    public boolean isLabelProperty(Object element, String property) {
        return false;
    }

    public void addListener(ILabelProviderListener listener) {
    }

    private IEditorPart getEditor(int index) {
        try {
            Method method = MultiPageEditorPart.class.getDeclaredMethod("getEditor", new Class[] { Integer.TYPE });
            method.setAccessible(true);
            Object result = method.invoke(this.editor, new Object[] { index });
            return (IEditorPart) result;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    private int getPageCount() {
        try {
            Method method = MultiPageEditorPart.class.getDeclaredMethod("getPageCount", new Class[] {});
            method.setAccessible(true);
            Object result = method.invoke(this.editor, new Object[] {});
            return (Integer) result;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }
}