diff options
Diffstat (limited to 'framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/Not.java')
-rw-r--r-- | framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/Not.java | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/Not.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/Not.java new file mode 100644 index 00000000..a39dcbb0 --- /dev/null +++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/taskdefs/condition/Not.java @@ -0,0 +1,50 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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.condition; + +import org.apache.tools.ant.BuildException; + +/** + * <not> condition. + * + * Evaluates to true if the single condition nested into it is false + * and vice versa. + * + * @since Ant 1.4 + */ +public class Not extends ConditionBase implements Condition { + + /** + * Evaluate condition + * + * @return true if the condition is true. + * @throws BuildException if the condition is not configured correctly. + */ + public boolean eval() throws BuildException { + if (countConditions() > 1) { + throw new BuildException("You must not nest more than one " + + "condition into <not>"); + } + if (countConditions() < 1) { + throw new BuildException("You must nest a condition into <not>"); + } + return !((Condition) getConditions().nextElement()).eval(); + } + +} |