com.liferay.ide.kaleo.ui.action.AbstractWorkflowDefinitionAction.java Source code

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Here is the source code for com.liferay.ide.kaleo.ui.action.AbstractWorkflowDefinitionAction.java

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/**
 * Copyright (c) 2014 Liferay, Inc. All rights reserved.
 *
 * The contents of this file are subject to the terms of the End User License
 * Agreement for Liferay Developer Studio ("License"). You may not use this file
 * except in compliance with the License. You can obtain a copy of the License
 * by contacting Liferay, Inc. See the License for the specific language
 * governing permissions and limitations under the License, including but not
 * limited to distribution rights of the Software.
 */

package com.liferay.ide.kaleo.ui.action;

import com.liferay.ide.kaleo.ui.navigator.WorkflowDefinitionEntry;
import com.liferay.ide.kaleo.ui.navigator.WorkflowDefinitionsFolder;

import java.util.Iterator;

import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.ui.actions.SelectionProviderAction;

/**
 * @author Gregory Amerson
 */
public abstract class AbstractWorkflowDefinitionAction extends SelectionProviderAction {

    protected Shell shell;

    public AbstractWorkflowDefinitionAction(ISelectionProvider selectionProvider, String text) {
        this(null, selectionProvider, text);
    }

    public AbstractWorkflowDefinitionAction(Shell shell, ISelectionProvider selectionProvider, String text) {
        super(selectionProvider, text);
        this.shell = shell;
        setEnabled(false);
    }

    public boolean accept(Object node) {
        return node instanceof WorkflowDefinitionEntry || node instanceof WorkflowDefinitionsFolder;
    }

    public Shell getShell() {
        return this.shell;
    }

    public abstract void perform(Object node);

    @SuppressWarnings("rawtypes")
    public void run() {
        Iterator iterator = getStructuredSelection().iterator();

        if (!iterator.hasNext())
            return;

        Object obj = iterator.next();

        if (accept(obj)) {
            perform(obj);
        }

        selectionChanged(getStructuredSelection());
    }

    /**
     * Update the enabled state.
     *
     * @param sel
     *            a selection
     */
    @SuppressWarnings("rawtypes")
    public void selectionChanged(IStructuredSelection sel) {
        if (sel.isEmpty()) {
            setEnabled(false);
            return;
        }

        boolean enabled = false;
        Iterator iterator = sel.iterator();

        while (iterator.hasNext()) {
            Object obj = iterator.next();
            if (obj instanceof WorkflowDefinitionEntry) {
                WorkflowDefinitionEntry node = (WorkflowDefinitionEntry) obj;
                if (accept(node)) {
                    enabled = true;
                }
            } else if (obj instanceof WorkflowDefinitionsFolder) {
                WorkflowDefinitionsFolder node = (WorkflowDefinitionsFolder) obj;
                if (accept(node)) {
                    enabled = true;
                }
            } else {
                setEnabled(false);
                return;
            }
        }

        setEnabled(enabled);
    }
}