com.mercatis.lighthouse3.base.ui.handlers.AbstractStructuredSelectionHandler.java Source code

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Here is the source code for com.mercatis.lighthouse3.base.ui.handlers.AbstractStructuredSelectionHandler.java

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/*
 * Copyright 2011 mercatis Technologies AG
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.mercatis.lighthouse3.base.ui.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.runtime.IAdapterManager;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.forms.editor.IFormPage;
import org.eclipse.ui.handlers.HandlerUtil;
import com.mercatis.lighthouse3.ui.common.base.CommonBaseActivator;
import com.mercatis.lighthouse3.ui.environment.base.services.DomainService;

public abstract class AbstractStructuredSelectionHandler extends AbstractHandler {

    protected IAdapterManager adapterManager = Platform.getAdapterManager();

    protected DomainService domainService = CommonBaseActivator.getPlugin().getDomainService();

    protected IWorkbenchPart activePart;

    protected ISelection currentSelection;

    public Object execute(ExecutionEvent event) throws ExecutionException {
        preExecution(event);

        activePart = HandlerUtil.getActivePart(event);
        currentSelection = HandlerUtil.getCurrentSelection(event);

        if (currentSelection == null || !(currentSelection instanceof IStructuredSelection)) {
            return null;
        }

        IStructuredSelection structuredSelection = (IStructuredSelection) currentSelection;
        Object[] elements = structuredSelection.toArray();

        for (Object element : elements) {
            execute(element);
        }

        postExecution(event);
        return null;
    }

    protected abstract void execute(Object element) throws ExecutionException;

    protected void postExecution(ExecutionEvent event) throws ExecutionException {
    }

    protected void preExecution(ExecutionEvent event) throws ExecutionException {
    }

    protected IEditorPart getActiveEditor() {
        return PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
    }

    protected IFormPage getActiveEditorFormPage() {
        IEditorPart editor = PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage().getActiveEditor();
        if (editor instanceof FormEditor) {
            FormEditor fe = (FormEditor) editor;
            IFormPage page = fe.getActivePageInstance();
            return page;
        }
        return null;
    }

    protected IWorkbenchPart getActivePart() {
        return activePart;
    }

    protected ISelection getCurrentSelection() {
        return currentSelection;
    }
}