Moved the instantiation of the RE matcher to a factory. Users can now

choose an implementation of there own by setting a system property. git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@268264 13f79535-47bb-0310-9956-ffa450edef68
24 years ago · 4c5c8d89be
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -49,10 +49,10 @@ mkdir -p ${CLASSDIR}
 echo ... Compiling Ant Classes

 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/tar/*.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/util/regexp/RegexpMatcher.java ${TOOLS}/ant/util/regexp/RegexpMatcherFactory.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/util/*.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/types/*.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/*.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/util/regexp/RegexpMatcher.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/util/*.java
 ${JAVAC} -d ${CLASSDIR} ${TOOLS}/ant/taskdefs/*.java

 echo ... Copying Required Files
--- a/build.xml
+++ b/build.xml
@@ -41,6 +41,7 @@
  <property name="build.compiler" value="classic"/>
  <property name="build.compiler.emacs" value="on"/>
  <property name="junit.fork" value="false" />
  <property name="javac.optimize" value="true" />

  <!-- =================================================================== -->
  <!-- Define a global set of patterns that can be referenced by           -->
@@ -96,7 +97,7 @@
           destdir="${build.classes}"
           debug="on"
           deprecation="off"
           optimize="on" >
           optimize="${javac.optimize}" >
      <classpath refid="classpath" />

      <exclude name="**/Script.java" unless="bsf.present" />
--- a/docs/P4desc.html
+++ b/docs/P4desc.html
@@ -1,90 +0,0 @@
 <html>

 <body>

 <h2><a name="perforce">Perforce</a></h2>

 <h3>Description</h3>

 <p>Handles packages/modules retrieved from a <a href="http://www.perforce.com/">Perforce</a> repository.</p>

 <h3>Parameters</h3>

 <table border="1" cellpadding="2" cellspacing="0">
    <tr>
        <td valign="top"><b>Attribute</b></td>
        <td valign="top"><b>Description</b></td>
        <td align="center" valign="top"><b>Required</b></td>
    </tr>
    <tr>
        <td valign="top">localpath</td>
        <td valign="top">The local path of the file/directory to
        write file(s) to.</td>
        <td align="center" valign="top">Yes</td>
    </tr>
    <tr>
        <td>user</td>
        <td>Specifies the user name, overriding the value of $P4USER,
        $USER, and $USERNAME in the environment.</td>
        <td><p align="center">No</p>
        </td>
    </tr>
    <tr>
        <td>port</td>
        <td>Specifies the server's listen address, overriding the
        value of $P4PORT in the environment and the default (perforce:1666).</td>
        <td><p align="center">No</p>
        </td>
    </tr>
    <tr>
        <td valign="top">version</td>
        <td valign="top">The revision number of the file being
        extracted.</td>
        <td align="center" valign="top">No</td>
    </tr>
    <tr>
        <td valign="top">date</td>
        <td valign="top">Get files as of this date. Either [yyyy/mm/dd]
        or [yyyy/mm/dd:hh:mm:ss]. Note that [yyyy/mm/dd] means [yyyy/mm/dd:00:00:00],
        so if you want to include all events on that day refer to
        the next day.</td>
        <td align="center" valign="top">No</td>
    </tr>
    <tr>
        <td valign="top">label</td>
        <td valign="top">A label from which to check out files.</td>
        <td align="center" valign="top">No</td>
    </tr>
    <tr>
        <td valign="top">force</td>
        <td valign="top">&quot;[true|false]&quot;. Forces
        resynchronization even if the client already has the
        file, and clobbers writable files. This flag doesn't
        affect open files.</td>
        <td align="center" valign="top">No, default &quot;false&quot;</td>
    </tr>
    <tr>
        <td>change</td>
        <td>Gets the file(s) as they were when a specified change
        number was applied.</td>
        <td><p align="center">No</p>
        </td>
    </tr>
 </table>

 <h3>Examples</h3>

 <pre>  &lt;perforce localpath=&quot;//path/to/source/...&quot;
       force=&quot;true&quot;
       change=&quot;4513&quot;
  /&gt;</pre>

 <p>syncs the files in the source directory that are in the
 Perforce repository, as of change number 4513, overwriting any
 modified files in the current source tree is needed.</p>

 <pre>  &lt;perforce localpath=&quot;//path/to/source/...&quot; /&gt;</pre>

 <p>Syncs with the latest version of the file in the repository.</p>
 </body>
 </html>
--- a/docs/index.html
+++ b/docs/index.html
@@ -27,7 +27,7 @@
  <li>Dave Walend (<a href="mailto:dwalend@cs.tufts.edu">dwalend@cs.tufts.edu</a>)</li>
 </ul>

 <p>Version 1.3 - 2000/11/14</p>
 <p>Version 1.3 - 2000/11/29</p>

 <hr>
 <h2>Table of Contents</h2>
@@ -4550,7 +4550,6 @@ it had been located at <code>htdocs/manual/ChangeLog.txt</code>.</p>
  <li><a href="junit.html">JUnit</a></li>
  <li><a href="native2ascii.html">Native2Ascii</a></li>
  <li><a href="#netrexxc">NetRexxC</a></li>
  <li><a href="P4desc.html">Perforce</a></li>
  <li><a href="propertyfile.html">PropertyFile</a></li>
  <li><a href="#renameexts">RenameExtensions</a></li>
  <li><a href="#script">Script</a></li>
--- a/src/main/org/apache/tools/ant/util/RegexpPatternMapper.java
+++ b/src/main/org/apache/tools/ant/util/RegexpPatternMapper.java
@@ -56,6 +56,7 @@ package org.apache.tools.ant.util;

 import org.apache.tools.ant.BuildException;
 import org.apache.tools.ant.util.regexp.RegexpMatcher;
 import org.apache.tools.ant.util.regexp.RegexpMatcherFactory;

 import java.util.Enumeration;
 import java.util.Vector;
@@ -70,30 +71,23 @@ public class RegexpPatternMapper implements FileNameMapper {
    protected RegexpMatcher reg = null;
    protected char[] to = null;
    protected StringBuffer result = new StringBuffer();
    protected Class regexpMatcherClass = null;

    public RegexpPatternMapper() throws BuildException {
        try {
            regexpMatcherClass = Class.forName("org.apache.tools.ant.util.regexp.JakartaOroMatcher");

            if (regexpMatcherClass == null) {
                regexpMatcherClass = Class.forName("org.apache.tools.ant.util.regexp.JakartaRegexpMatcher");
                 
            }
        } catch (ClassNotFoundException ce) {
        } catch (NoClassDefFoundError ne) {
        }

        if (regexpMatcherClass == null) {
            throw new BuildException("No supported regular expression matcher found");
        }
        reg = (new RegexpMatcherFactory()).newRegexpMatcher();
    }
    
    /**
     * Sets the &quot;from&quot; pattern. Required.
     */
    public void setFrom(String from) throws BuildException {
        reg = createMatcher(from);
        try {
            reg.setPattern(from);
        } catch (NoClassDefFoundError e) {
            // depending on the implementation the actual RE won't
            // get instantiated in the constructor.
            throw new BuildException("Cannot load regular expression matcher",
                                     e);
        }
    }

    /**
@@ -144,19 +138,4 @@ public class RegexpPatternMapper implements FileNameMapper {
        return result.toString();
    }

    /**
     * Create an implementation of RegexpMatcher based on the classes
     * that can be loaded.
     */
    protected RegexpMatcher createMatcher(String pattern) 
        throws BuildException {
        try {
            RegexpMatcher rm = (RegexpMatcher) regexpMatcherClass.newInstance();
            rm.setPattern(pattern);
            return rm;
        } catch (Throwable t) {
            throw new BuildException(t);
        }
        
    }
 }
--- a/src/main/org/apache/tools/ant/util/regexp/RegexpMatcherFactory.java
+++ b/src/main/org/apache/tools/ant/util/regexp/RegexpMatcherFactory.java
@@ -0,0 +1,102 @@
 /*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2000 The Apache Software Foundation.  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:  
 *       "This product includes software developed by the 
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Ant", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written 
 *    permission, please contact apache@apache.org.
 *
 * 5. Products derived from this software may not be called "Apache"
 *    nor may "Apache" appear in their names without prior written
 *    permission of the Apache Group.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

 package org.apache.tools.ant.util.regexp;

 import org.apache.tools.ant.BuildException;

 /**
 * Simple Factory Class that produces an implementation of
 * RegexpMatcher based on the system property
 * <code>ant.regexp.matcherimpl</code> and the classes
 * available.
 * 
 * <p>In a more general framework this class would be abstract and
 * have a static newInstance method.</p>
 *
 * @author <a href="mailto:stefan.bodewig@epost.de">Stefan Bodewig</a> 
 */
 public class RegexpMatcherFactory {

    public RegexpMatcherFactory() {}

    public RegexpMatcher newRegexpMatcher() throws BuildException {
        String systemDefault = System.getProperty("ant.regexp.matcherimpl");
        if (systemDefault != null) {
            return createInstance(systemDefault);
            // XXX     should we silently possible exceptions and try to 
            //         load a different implementation?
        }

        try {
            return createInstance("org.apache.tools.ant.util.regexp.JakartaOroMatcher");
        } catch (BuildException be) {}
        
        try {
            return createInstance("org.apache.tools.ant.util.regexp.JakartaRegexpMatcher");
        } catch (BuildException be) {}

        throw new BuildException("No supported regular expression matcher found");
   }

    protected RegexpMatcher createInstance(String className) 
        throws BuildException {
        try {
            Class implClass = Class.forName(className);
            return (RegexpMatcher) implClass.newInstance();
        } catch (Throwable t) {
            throw new BuildException(t);
        }
    }
 }