| /******************************************************************************* |
| * Copyright (c) 2000, 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; |
| |
| import org.w3c.dom.Element; |
| |
| import org.eclipse.core.expressions.EvaluationResult; |
| import org.eclipse.core.expressions.Expression; |
| import org.eclipse.core.expressions.ExpressionInfo; |
| import org.eclipse.core.expressions.IEvaluationContext; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.core.runtime.IConfigurationElement; |
| |
| public class SystemTestExpression extends Expression { |
| |
| private String fProperty; |
| private String fExpectedValue; |
| |
| private static final String ATT_PROPERTY= "property"; //$NON-NLS-1$ |
| |
| /** |
| * The seed for the hash code for all system test expressions. |
| */ |
| private static final int HASH_INITIAL= SystemTestExpression.class.getName().hashCode(); |
| |
| 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(Element element) throws CoreException { |
| fProperty= element.getAttribute(ATT_PROPERTY); |
| Expressions.checkAttribute(ATT_PROPERTY, fProperty.length() > 0 ? fProperty : null); |
| fExpectedValue= element.getAttribute(ATT_VALUE); |
| Expressions.checkAttribute(ATT_VALUE, fExpectedValue.length() > 0 ? fExpectedValue : null); |
| } |
| |
| public SystemTestExpression(String property, String expectedValue) { |
| Assert.isNotNull(property); |
| Assert.isNotNull(expectedValue); |
| fProperty= property; |
| fExpectedValue= expectedValue; |
| } |
| |
| @Override |
| public EvaluationResult evaluate(IEvaluationContext context) throws CoreException { |
| String str= System.getProperty(fProperty); |
| if (str == null) |
| return EvaluationResult.FALSE; |
| return EvaluationResult.valueOf(str.equals(fExpectedValue)); |
| } |
| |
| @Override |
| public void collectExpressionInfo(ExpressionInfo info) { |
| info.markSystemPropertyAccessed(); |
| } |
| |
| @Override |
| public boolean equals(final Object object) { |
| if (!(object instanceof SystemTestExpression)) |
| return false; |
| |
| final SystemTestExpression that= (SystemTestExpression)object; |
| return this.fProperty.equals(that.fProperty) |
| && this.fExpectedValue.equals(that.fExpectedValue); |
| } |
| |
| @Override |
| protected int computeHashCode() { |
| return HASH_INITIAL * HASH_FACTOR + fExpectedValue.hashCode() |
| * HASH_FACTOR + fProperty.hashCode(); |
| } |
| |
| // ---- Debugging --------------------------------------------------- |
| |
| @Override |
| public String toString() { |
| return "<systemTest property=\"" + fProperty + //$NON-NLS-1$ |
| "\" value=\"" + fExpectedValue + "\""; //$NON-NLS-1$ //$NON-NLS-2$ |
| } |
| } |