Copyright (c) 2006, 2008 IBM Corporation and others.
This program and the accompanying materials
are made available under the terms of the Eclipse Public License 2.0
which accompanies this distribution, and is available at
https://www.eclipse.org/legal/epl-2.0/
SPDX-License-Identifier: EPL-2.0
Contributors:
    IBM Corporation - initial API and implementation
/*******************************************************************************
 * Copyright (c) 2006, 2008 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.core.internal.expressions.propertytester;

import org.osgi.framework.Bundle;

import org.eclipse.core.expressions.PropertyTester;

import org.eclipse.core.runtime.IProduct;
import org.eclipse.core.runtime.Platform;

A property tester for testing platform properties. Can test whether or
not a given bundle is installed in the running environment, as well as
the id of the currently active product.

For example:

<test property="org.eclipse.core.runtime.product" value="org.eclipse.sdk.ide"/>
<test property="org.eclipse.core.runtime.isBundleInstalled" args="org.eclipse.core.expressions"/>
<test property="org.eclipse.core.runtime.bundleState" args="org.eclipse.core.expressions" value="ACTIVE"/>

/**
 * A property tester for testing platform properties. Can test whether or
 * not a given bundle is installed in the running environment, as well as
 * the id of the currently active product.
 * <p>
 * For example:
 * </p>
 * <pre>
 * &lt;test property="org.eclipse.core.runtime.product" value="org.eclipse.sdk.ide"/&gt;
 * &lt;test property="org.eclipse.core.runtime.isBundleInstalled" args="org.eclipse.core.expressions"/&gt;
 * &lt;test property="org.eclipse.core.runtime.bundleState" args="org.eclipse.core.expressions" value="ACTIVE"/&gt;
 * </pre>
 */
public class PlatformPropertyTester extends PropertyTester {

	private static final String PROPERTY_PRODUCT = "product"; //$NON-NLS-1$
	private static final String PROPERTY_IS_BUNDLE_INSTALLED = "isBundleInstalled"; //$NON-NLS-1$
	private static final String PROPERTY_BUNDLE_STATE = "bundleState"; //$NON-NLS-1$

	@Override
	public boolean test(Object receiver, String property, Object[] args, Object expectedValue) {
		if (Platform.class.equals(receiver)) {
			if (PROPERTY_PRODUCT.equals(property)) {
				IProduct product= Platform.getProduct();
				if (product != null) {
					return product.getId().equals(expectedValue);
				}
				return false;
			} else if (PROPERTY_IS_BUNDLE_INSTALLED.equals(property) && args.length >= 1 && args[0] instanceof String) {
				return Platform.getBundle((String)args[0]) != null;
			} else if (PROPERTY_BUNDLE_STATE.equals(property)
					&& args.length >= 1 && args[0] instanceof String) {
				Bundle b = Platform.getBundle((String) args[0]);
				if (b != null) {
					return bundleState(b.getState(), expectedValue);
				}
				return false;
			}
		}
		return false;
	}

	private boolean bundleState(int bundleState, Object expectedValue) {
		if ("UNINSTALLED".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.UNINSTALLED;
		}
		if ("INSTALLED".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.INSTALLED;
		}
		if ("RESOLVED".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.RESOLVED;
		}
		if ("STARTING".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.STARTING;
		}
		if ("STOPPING".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.STOPPING;
		}
		if ("ACTIVE".equals(expectedValue)) { //$NON-NLS-1$
			return bundleState == Bundle.ACTIVE;
		}
		return false;
	}
}