alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Ant example source code file (GlobPatternMapper.java)

This example Ant source code file (GlobPatternMapper.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

filenamemapper, filenamemapper, globpatternmapper, globpatternmapper, string, string

The GlobPatternMapper.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.util;

/**
 * Implementation of FileNameMapper that does simple wildcard pattern
 * replacements.
 *
 * <p>This does simple translations like *.foo -> *.bar where the
 * prefix to .foo will be left unchanged. It only handles a single *
 * character, use regular expressions for more complicated
 * situations.</p>
 *
 * <p>This is one of the more useful Mappers, it is used by javac for
 * example.</p>
 *
 */
public class GlobPatternMapper implements FileNameMapper {

    // CheckStyle:VisibilityModifier OFF - bc
    /**
     * Part of "from" pattern before the *.
     */
    protected String fromPrefix = null;

    /**
     * Part of "from" pattern after the *.
     */
    protected String fromPostfix = null;

    /**
     * Length of the prefix ("from" pattern).
     */
    protected int prefixLength;

    /**
     * Length of the postfix ("from" pattern).
     */
    protected int postfixLength;

    /**
     * Part of "to" pattern before the *.
     */
    protected String toPrefix = null;

    /**
     * Part of "to" pattern after the *.
     */
    protected String toPostfix = null;

    // CheckStyle:VisibilityModifier ON

    private boolean handleDirSep = false;
    private boolean caseSensitive = true;

    /**
     * Attribute specifing whether to ignore the difference
     * between / and \ (the two common directory characters).
     * @param handleDirSep a boolean, default is false.
     * @since Ant 1.6.3
     */
    public void setHandleDirSep(boolean handleDirSep) {
        this.handleDirSep = handleDirSep;
    }

    /**
     * Attribute specifing whether to ignore the case difference
     * in the names.
     *
     * @param caseSensitive a boolean, default is false.
     * @since Ant 1.6.3
     */
    public void setCaseSensitive(boolean caseSensitive) {
        this.caseSensitive = caseSensitive;
    }

    /**
     * Sets the "from" pattern. Required.
     * @param from a string
     */
    public void setFrom(String from) {
        int index = from.lastIndexOf("*");
        if (index == -1) {
            fromPrefix = from;
            fromPostfix = "";
        } else {
            fromPrefix = from.substring(0, index);
            fromPostfix = from.substring(index + 1);
        }
        prefixLength = fromPrefix.length();
        postfixLength = fromPostfix.length();
    }

    /**
     * Sets the "to" pattern. Required.
     * @param to a string
     */
    public void setTo(String to) {
        int index = to.lastIndexOf("*");
        if (index == -1) {
            toPrefix = to;
            toPostfix = "";
        } else {
            toPrefix = to.substring(0, index);
            toPostfix = to.substring(index + 1);
        }
    }

    /**
     * Returns null if the source file name doesn't match the
     * "from" pattern, an one-element array containing the
     * translated file otherwise.
     * @param sourceFileName the filename to map
     * @return a list of converted filenames
     */
    public String[] mapFileName(String sourceFileName) {
        if (fromPrefix == null
            || !modifyName(sourceFileName).startsWith(modifyName(fromPrefix))
            || !modifyName(sourceFileName).endsWith(modifyName(fromPostfix))) {
            return null;
        }
        return new String[] {toPrefix
                                 + extractVariablePart(sourceFileName)
                                 + toPostfix};
    }

    /**
     * Returns the part of the given string that matches the * in the
     * "from" pattern.
     * @param name the source file name
     * @return the variable part of the name
     */
    protected String extractVariablePart(String name) {
        return name.substring(prefixLength,
                              name.length() - postfixLength);
    }

    /**
     * modify string based on dir char mapping and case sensitivity
     * @param name the name to convert
     * @return the converted name
     */
    private String modifyName(String name) {
        if (!caseSensitive) {
            name = name.toLowerCase();
        }
        if (handleDirSep) {
            if (name.indexOf('\\') != -1) {
                name = name.replace('\\', '/');
            }
        }
        return name;
    }
}

Other Ant examples (source code examples)

Here is a short list of links related to this Ant GlobPatternMapper.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.