| /******************************************************************************* |
| * Copyright (c) 2003 International Business Machines Corp. and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v0.5 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v05.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.core.internal.expressions; |
| |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| |
| public class SystemTestExpression extends Expression { |
| |
| private String fProperty; |
| private String fExpectedValue; |
| |
| private static final String ATT_PROPERTY= "property"; //$NON-NLS-1$ |
| |
| public SystemTestExpression(IConfigurationElement element) throws CoreException { |
| fProperty= element.getAttribute(ATT_PROPERTY); |
| Expressions.checkAttribute(ATT_PROPERTY, fProperty); |
| fExpectedValue= element.getAttribute(ATT_VALUE); |
| Expressions.checkAttribute(ATT_VALUE, fExpectedValue); |
| } |
| |
| public SystemTestExpression(String property, String expectedValue) { |
| fProperty= property; |
| fExpectedValue= expectedValue; |
| } |
| |
| public EvaluationResult evaluate(IEvaluationContext context) throws CoreException { |
| String str= System.getProperty(fProperty); |
| if (str == null) |
| return EvaluationResult.FALSE; |
| return EvaluationResult.valueOf(str.equals(fExpectedValue)); |
| } |
| |
| //---- Debugging --------------------------------------------------- |
| |
| /* (non-Javadoc) |
| * @see java.lang.Object#toString() |
| */ |
| public String toString() { |
| return "<systemTest property=\"" + fProperty + //$NON-NLS-1$ |
| "\" value=\"" + fExpectedValue + "\""; //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| } |