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Ant example source code file (Type.java)

This example Ant source code file (Type.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Ant tags/keywords

dir, dir_attr, enumeratedattribute, file, file_attr, file_attr, filedir, filedir, resourceselector, string, string, type, type, values

The Type.java source code

/*
 *  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.types.resources.selectors;

import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.types.Resource;
import org.apache.tools.ant.types.EnumeratedAttribute;

/**
 * Type file/dir ResourceSelector.
 * @since Ant 1.7
 */
public class Type implements ResourceSelector {

    private static final String FILE_ATTR = "file";
    private static final String DIR_ATTR = "dir";

    /** Static file type selector. */
    public static final Type FILE = new Type(new FileDir(FILE_ATTR));

    /** Static dir type selector. */
    public static final Type DIR = new Type(new FileDir(DIR_ATTR));

    /**
     * Implements the type attribute.
     */
    public static class FileDir extends EnumeratedAttribute {
        private static final String[] VALUES = new String[] {FILE_ATTR, DIR_ATTR};

        /**
         * Default constructor.
         */
        public FileDir() {
        }

        /**
         * Convenience constructor.
         * @param value the String EnumeratedAttribute value.
         */
        public FileDir(String value) {
            setValue(value);
        }

        /**
         * Return the possible values.
         * @return a String array.
         */
        public String[] getValues() {
            return VALUES;
        }
    }

    private FileDir type = null;

    /**
     * Default constructor.
     */
    public Type() {
    }

    /**
     * Convenience constructor.
     * @param fd the FileDir type.
     */
    public Type(FileDir fd) {
        setType(fd);
    }

    /**
     * Set type; file|dir.
     * @param fd a FileDir object.
     */
    public void setType(FileDir fd) {
        type = fd;
    }

    /**
     * Return true if this Resource is selected.
     * @param r the Resource to check.
     * @return whether the Resource was selected.
     */
    public boolean isSelected(Resource r) {
        if (type == null) {
            throw new BuildException("The type attribute is required.");
        }
        int i = type.getIndex();
        return r.isDirectory() ? i == 1 : i == 0;
    }

}

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