/*
 * Copyright (c) 2004-2011 Marco Maccaferri and others.
 * 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:
 *     Marco Maccaferri - initial API and implementation
 */

package org.eclipsetrader.ui.internal.charts;

import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipsetrader.ui.charts.ChartViewItem;
import org.eclipsetrader.ui.charts.IChartObjectFactory;

/**
 * Provides property tests for <code>ChartViewItem</code> objects.
 *
 * @since 1.0
 */
public class ChartViewItemPropertyTester extends PropertyTester {

    public ChartViewItemPropertyTester() {
    }

    /* (non-Javadoc)
     * @see org.eclipse.core.expressions.IPropertyTester#test(java.lang.Object, java.lang.String, java.lang.Object[], java.lang.Object)
     */
    @Override
    @SuppressWarnings("unchecked")
    public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
        if (receiver instanceof IAdaptable) {
            receiver = ((IAdaptable) receiver).getAdapter(ChartViewItem.class);
        }

        if (receiver == null || !(receiver instanceof ChartViewItem)) {
            return false;
        }

        if ("id".equals(property)) { //$NON-NLS-1$
            String id = ((ChartViewItem) receiver).getId();
            return id.equals(expectedValue);
        }
        else if ("chartObjectFactory".equals(property)) { //$NON-NLS-1$
            IChartObjectFactory factory = ((ChartViewItem) receiver).getFactory();
            if (factory != null && factory.getId() != null) {
                return factory.getId().equals(expectedValue);
            }
        }
        else if ("adapts".equals(property)) { //$NON-NLS-1$
            if (!(receiver instanceof IAdaptable)) {
                return false;
            }
            try {
                Class clazz = Class.forName(expectedValue.toString());
                Object o = ((IAdaptable) receiver).getAdapter(clazz);
                if (o != null && clazz.isAssignableFrom(o.getClass())) {
                    return true;
                }
            } catch (Exception e) {
                e.printStackTrace();
                // Do nothing
            }
        }

        return false;
    }
}