| 1 | /*
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| 2 | * Copyright 2002-2004 The Apache Software Foundation
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| 3 | *
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| 4 | * Licensed under the Apache License, Version 2.0 (the "License");
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| 5 | * you may not use this file except in compliance with the License.
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| 6 | * You may obtain a copy of the License at
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| 7 | *
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| 8 | * http://www.apache.org/licenses/LICENSE-2.0
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| 9 | *
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| 10 | * Unless required by applicable law or agreed to in writing, software
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| 11 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 13 | * See the License for the specific language governing permissions and
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| 14 | * limitations under the License.
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| 15 | *
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| 16 | */
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| 17 |
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| 18 | package org.apache.tools.ant.taskdefs.condition;
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| 19 |
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| 20 | import org.apache.tools.ant.BuildException;
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| 21 | import org.apache.tools.ant.ProjectComponent;
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| 22 |
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| 23 | /**
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| 24 | * Condition that tests whether a given string evals to false
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| 25 | *
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| 26 | * @since Ant 1.5
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| 27 | */
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| 28 | public class IsFalse extends ProjectComponent implements Condition {
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| 29 | /**
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| 30 | * what we eval
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| 31 | */
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| 32 | private Boolean value = null;
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| 33 |
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| 34 | /**
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| 35 | * set the value to be tested; let ant eval it to true/false
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| 36 | * @param value the value to test
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| 37 | */
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| 38 | public void setValue(boolean value) {
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| 39 | this.value = value ? Boolean.TRUE : Boolean.FALSE;
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| 40 | }
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| 41 |
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| 42 | /**
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| 43 | * @return the inverted value;
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| 44 | * @throws BuildException if someone forgot to spec a value
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| 45 | */
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| 46 | public boolean eval() throws BuildException {
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| 47 | if (value == null) {
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| 48 | throw new BuildException("Nothing to test for falsehood");
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| 49 | }
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| 50 | return !value.booleanValue();
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| 51 | }
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| 52 |
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| 53 | }
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| 54 |
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