- /*
- * Copyright 2003-2004 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.types.selectors.modifiedselector;
-
-
- import java.io.File;
-
-
- /**
- * The <i>Algorithm</i> defines how a value for a file is computed.
- * It must be sure that multiple calls for the same file results in the
- * same value.
- * The implementing class should implement a useful toString() method.
- *
- * @version 2003-09-13
- * @since Ant 1.6
- */
- public interface Algorithm {
-
- /**
- * Checks its prerequisites.
- * @return <i>true</i> if all is ok, otherwise <i>false</i>.
- */
- boolean isValid();
-
- /**
- * Get the value for a file.
- * @param file File object for which the value should be evaluated.
- * @return The value for that file
- */
- String getValue(File file);
- }