- /*
- * Copyright 2001-2004 The Apache Software Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- */
-
- package org.apache.tools.ant.taskdefs;
-
- import org.apache.tools.ant.BuildException;
- import org.apache.tools.ant.Project;
- import org.apache.tools.ant.taskdefs.condition.Condition;
- import org.apache.tools.ant.taskdefs.condition.ConditionBase;
-
- /**
- * Task to set a property conditionally using <uptodate>, <available>,
- * and many other supported conditions.
- *
- * <p>This task supports boolean logic as well as pluggable conditions
- * to decide, whether a property should be set.</p>
- *
- * <p>This task does not extend Task to take advantage of
- * ConditionBase.</p>
- *
- * @version $Revision: 1.16.2.4 $
- *
- * @since Ant 1.4
- *
- * @ant.task category="control"
- */
- public class ConditionTask extends ConditionBase {
-
- private String property = null;
- private String value = "true";
-
- /**
- * The name of the property to set. Required.
- * @param p the name of the property
- * @since Ant 1.4
- */
- public void setProperty(String p) {
- property = p;
- }
-
- /**
- * The value for the property to set, if condition evaluates to true.
- * Defaults to "true".
- * @param v the value of the property
- * @since Ant 1.4
- */
- public void setValue(String v) {
- value = v;
- }
-
- /**
- * See whether our nested condition holds and set the property.
- *
- * @since Ant 1.4
- * @exception BuildException if an error occurs
- */
- public void execute() throws BuildException {
- if (countConditions() > 1) {
- throw new BuildException("You must not nest more than one "
- + "condition into <condition>");
- }
- if (countConditions() < 1) {
- throw new BuildException("You must nest a condition into "
- + "<condition>");
- }
- if (property == null) {
- throw new BuildException("The property attribute is required.");
- }
-
- Condition c = (Condition) getConditions().nextElement();
- if (c.eval()) {
- log("Condition true; setting " + property + " to " + value,
- Project.MSG_DEBUG);
- getProject().setNewProperty(property, value);
- } else {
- log("Condition false; not setting " + property,
- Project.MSG_DEBUG);
- }
- }
- }