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| <title>MParse Task</title> |
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| <h2><a name="mparse">MParse</a></h2> |
| <p>by</p> |
| <ul> |
| <li>Stephane Bailliez (<a href="mailto:sbailliez@imediation.com">sbailliez@imediation.com</a>)</li> |
| </ul> |
| <h3>Requirements</h3> |
| <p>This task requires Metamata Development environment 2.0 freely available at <a href="http://www.metamata.com">Metamata</a>.</p> |
| <h3>Description</h3> |
| <p> |
| Invokes the Metamata <a HREF="http://www.metamata.com/parse.html">MParse</a> compiler |
| compiler on a grammar file. |
| </p> |
| <p> |
| To use the <i>mparse</i> task, set the <i>target</i> attribute to the name of the |
| grammar file to process. You also need to specify the directory containing |
| the Metamata installation using the <i>metamatahome</i> attribute, so that Ant |
| can find the MParse classes. |
| </p> |
| <p> |
| This task only invokes MParse if the grammar file is newer than the generated |
| Java files. MParse assumes that the Java class name of the generated parser |
| is the same as the name of the grammar file, less the .jj extension. |
| </p> |
| |
| <p>For additional information about MParse, please consult the online manual available <a href="http://download.metamata.com/parse.pdf">here</a> |
| (PDF) |
| </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">target</td> |
| <td valign="top">The .jj grammar file to process. It will only be processed |
| if the grammar is newer than the corresponding .java file.</td> |
| <td valign="top" align="center">Yes</td> |
| </tr> |
| <tr> |
| <td valign="top">metamatahome</td> |
| <td valign="top">The home directory containing the Metamata distribution.</td> |
| <td valign="top" align="center">Yes</td> |
| </tr> |
| <tr> |
| <td valign="top">verbose</td> |
| <td valign="top"> |
| Enable all messages |
| </td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| <tr> |
| <td valign="top">debugparser</td> |
| <td valign="top"> |
| Enables parser debugging |
| </td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| <tr> |
| <td valign="top">debugscanner</td> |
| <td valign="top"> |
| Enables scanner debugging |
| </td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| <tr> |
| <td valign="top">cleanup</td> |
| <td valign="top">Remove the intermediate Sun |
| JavaCC file created during the transformation of the grammar file.</td> |
| <td valign="top" align="center">No. Default to false</td> |
| </tr> |
| <tr> |
| <td valign="top">maxmemory</td> |
| <td valign="top">Set the maximum memory for the JVM. this is a convenient |
| way to set the -mx or -Xmx argument.</td> |
| <td valign="top" align="center">No</td> |
| </tr> |
| </table> |
| <h3>Nested elements</h3> |
| <h4>jvmarg</h4> |
| <p>Additional parameters may be passed to the VM via nested <code><jvmarg></code> |
| attributes. <code><jvmarg></code> allows all attributes described in <a href="../using.html#arg">Command |
| line arguments</a>.</p> |
| <h4>classpath</h4> |
| <p>Sets class path (also source path unless one explicitly set). Overrides |
| METAPATH/CLASSPATH environment variables. The <tt>classpath</tt> element represents a <a href="../using.html#path">PATH like |
| structure</a>.</p> |
| <h4>sourcepath</h4> |
| <p>Sets source path. Overrides the SOURCEPATH environment variable. The <tt>sourcepath</tt> element represents a <a href="../using.html#path">PATH like |
| structure</a>.</p> |
| <h3>Example</h3> |
| <pre> <mparse target="c:/metamata/examples/parseexamples/javagrammars/singlefile/JavaParser.jj" |
| metamatahome="c:/metamata" cleanup="true"> |
| <classpath> |
| <pathelement location="c:/metamata/examples/"/> |
| </classpath> |
| </mparse></pre> |
| <p> |
| This invokes Metamata MParse installed in <tt>c:/metamata</tt> on one of the grammar file |
| example <tt>(JavaParser.jj)</tt> |
| and cleans up the intermediate Sun JavaCC file. |
| </p> |
| <hr> |
| <p align="center">Copyright © 2001 Apache Software Foundation. All rights |
| Reserved.</p> |
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