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## xdoclet.template
Class TemplateParser

    java.lang.Object
      xdoclet.template.TemplateEngine
          xdoclet.template.TemplateParser

public class TemplateParser
extends TemplateEngine

Subclass of Template Engine that do not generate anything but only parse the document. The TagHandlers have a callback entry to this method to set in it anything they want to. This class was introduced for parsing .j files and return a list of merge files needed for the generation. The timestamp checking can then verify all files involved in a generation and bypass the generation if -nothing has changed-.

Version:
  $Revision: 1.12 $
Author:
  Vincent Harcq (vincent.harcq@hubmethods.com)
created
  December 27, 2001

Field Summary

Fields inherited from class xdoclet.template.TemplateEngine
`out, output, TAG_MAPPINGS_FILE, XDOCLET_HEAD, XDOCLET_HEAD_LEN, XDOCLET_PREFIX, XDOCLET_TAIL, XDOCLET_TAIL_LEN`

Constructor Summary
`protected` | `TemplateParser()` Initialize the Template Engine.

Method Summary
`void` | `addMergeFile(String file)` Callback by the MergeTagsHandler to give the parser the list of merge files involved.
`void` | `generate(String template)` In this class, this method does not -generate- anything but only parse the files.
`String[]` | `getMergeFiles()` Return the list of merge files involved in the generation.
`static TemplateParser` | `getParserInstance()` Gets the ParserInstance attribute of the TemplateParser class
`TemplateTagHandler` | `getTagHandlerFor(String prefix)` Get the tag handler for the prefix.
`boolean` | `hasMergeFile(String file)` Callback by the MergeTagsHandler to know if a merge file has already been taken into account.
`protected Object` | `invoke(Method m, Object cmdImplProvider, Object[] params1)` Describe what the method does
`protected void` | `invokeContentMethod(String cmd, Properties attributes, String template, int i)` Describe what the method does
`void` | `start()` A utility method used for generating the dest_file based on template_file template file.

Methods inherited from class xdoclet.template.TemplateEngine
`getCurrentLineNum, getEngineInstance, getLineNumber, getNamespaces, getOutput, getTemplateURL, handleTag, invokeMethod, outputOf, print, setCurrentLineNum, setOutput, setTagHandlerFor, setTemplateURL, setWriter, setXJavaDoc, skipWhitespace`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### TemplateParser

    protected TemplateParser()

  Initialize the Template Engine. Reads the XDoclet properties file, and loads any XTag handler classes specified.

Method Detail

### getParserInstance

    public static TemplateParser getParserInstance()

  Gets the ParserInstance attribute of the TemplateParser class

  Returns:
    The ParserInstance value

### getTagHandlerFor

    public TemplateTagHandler getTagHandlerFor(String prefix)
                                        throws TemplateException

  Description copied from class: `TemplateEngine`
  Get the tag handler for the prefix.

  Overrides:
    `getTagHandlerFor` in class `TemplateEngine`
  Parameters:
    `prefix` - The prefix that the tag handler is mapped to
  Returns:
    The TemplateTagHandler for the specified prefix. ALways non-null.
  Throws:
    `TemplateException` - If there is no tag handler class for the prefix specified.

### getMergeFiles

    public String[] getMergeFiles()

  Return the list of merge files involved in the generation.

  Returns:
    an array of File

### start

    public void start()
               throws TemplateException

  A utility method used for generating the dest_file based on template_file template file.

  Overrides:
    `start` in class `TemplateEngine`
  Throws:
    `TemplateException` - Description of Exception

### generate

    public void generate(String template)
                  throws TemplateException

  In this class, this method does not -generate- anything but only parse the files. Callback to this class can be made by specific TagHandlers during the process.

  Overrides:
    `generate` in class `TemplateEngine`
  Parameters:
    `template` - Description of Parameter
  Throws:
    `TemplateException` - Description of Exception
  See Also:
    `TemplateEngine.outputOf(java.lang.String)`

### addMergeFile

    public void addMergeFile(String file)

  Callback by the MergeTagsHandler to give the parser the list of merge files involved.

  Parameters:
    `file` - one merge file involved

### hasMergeFile

    public boolean hasMergeFile(String file)

  Callback by the MergeTagsHandler to know if a merge file has already been taken into account.

  Parameters:
    `file` -
  Returns:

### invokeContentMethod

    protected void invokeContentMethod(String cmd,
                                       Properties attributes,
                                       String template,
                                       int i)
                                throws TemplateException

  Describe what the method does

  Overrides:
    `invokeContentMethod` in class `TemplateEngine`
  Parameters:
    `cmd` - Describe what the parameter does
    `attributes` - Describe what the parameter does
    `template` - Describe what the parameter does
    `i` - Describe what the parameter does
  Throws:
    `TemplateException` - Describe the exception
  See Also:
    `TemplateEngine.invokeMethod(java.lang.String,java.lang.Object[],java.lang.Object[],java.lang.String,int)`

### invoke

    protected Object invoke(Method m,
                            Object cmdImplProvider,
                            Object[] params1)
                     throws InvocationTargetException,
                            IllegalAccessException,
                            TemplateException

  Describe what the method does

  Overrides:
    `invoke` in class `TemplateEngine`
  Parameters:
    `m` - Describe what the parameter does
    `cmdImplProvider` - Describe what the parameter does
    `params1` - Describe what the parameter does
  Returns:
    Describe the return value
  Throws:
    `InvocationTargetException` - Describe the exception
    `IllegalAccessException` - Describe the exception
    `TemplateException` - Describe the exception

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