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/*******************************************************************************
* Copyright (C) 2017, Thomas Wolf <thomas.wolf@paranor.ch>
*
* All rights reserved. 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
*******************************************************************************/
package org.eclipse.egit.ui.internal.expressions;
import org.eclipse.core.expressions.PropertyTester;
import org.eclipse.core.runtime.Platform;
import org.osgi.framework.Bundle;
import org.osgi.framework.Version;
/**
* A {@link PropertyTester} to test some properties related to bundles. Offers
* the following property tests:
* <dl>
* <dt>isBundleInstalled
* args="bundleName[,minimumVersionInclusive[,maximumVersionExclusive]]"</dt>
* <dd>Like the org.eclipse.core.runtime.isBundleInstalled property test, but
* additionally allows to check for a version range. Specify 0.0.0 for the
* minimum version if you only want to test for < maximumVersionExclusive, and
* omit the maximum version if you only want to test >=
* minimumVersionInclusive.</dd>
* </dl>
*/
public class BundlePropertyTester extends AbstractPropertyTester {
@Override
public boolean test(Object receiver, String property, Object[] args,
Object expectedValue) {
if ("isBundleInstalled".equals(property)) { //$NON-NLS-1$
return computeResult(expectedValue, versionCheck(args));
}
return false;
}
private boolean versionCheck(Object[] args) {
if (args != null && args.length > 0 && args[0] instanceof String) {
Bundle bundle = Platform.getBundle((String) args[0]);
if (bundle == null) {
return false;
}
Version min = args.length > 1 ? toVersion(args[1]) : null;
Version max = args.length > 2 ? toVersion(args[2]) : null;
boolean inRange = true;
if (min != null) {
inRange = bundle.getVersion().compareTo(min) >= 0;
}
if (inRange && max != null) {
inRange = bundle.getVersion().compareTo(max) < 0;
}
return inRange;
}
return false;
}
private Version toVersion(Object arg) {
try {
return Version.valueOf(arg.toString());
} catch (IllegalArgumentException e) {
return null;
}
}
}
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