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## org.apache.jasper.parser
Class ParserUtils

    java.lang.Object
      |
      +--org.apache.jasper.parser.ParserUtils

public class ParserUtils
extends java.lang.Object

XML parsing utilities for processing web application deployment descriptor and tag library descriptor files. FIXME - make these use a separate class loader for the parser to be used.

Version:
  $Revision: 1.4.2.1 $ $Date: 2002/05/20 17:47:00 $
Author:
  Craig R. McClanahan

Field Summary
`protected java.lang.ClassLoader` | `classLoader` The class loader to use for accessing our XML parser.
`protected org.xml.sax.EntityResolver` | `entityResolver` An entity resolver for use when parsing XML documents.
`protected org.xml.sax.ErrorHandler` | `errorHandler` An error handler for use when parsing XML documents.

Constructor Summary
`ParserUtils()`

Method Summary
`protected TreeNode` | `convert(TreeNode parent, org.w3c.dom.Node node)` Create and return a TreeNode that corresponds to the specified Node, including processing all of the attributes and children nodes.
`static java.lang.ClassLoader` | `createClassLoader(java.lang.ClassLoader parentLoader)` Construct (if necessary) and return a class loader that has been configured with the specified parent class loader, and repositories as needed to access the required XML parser.
`static ParserUtils` | `createParserUtils(java.lang.ClassLoader parentLoader)` Create (if necessary) and return an instance of ParserUtils that has been loaded by our subordinate class loader (and therefore should have access to the XML parser that is visible to repositories of that class loader).
`java.lang.ClassLoader` | `getClassLoader()` Return the class loader used to access our XML parser.
`static void` | `main(java.lang.String[] args)` Usage: java org.apache.jasper.parser.ParserUtils {pathname}
`TreeNode` | `parseXMLDocument(java.lang.String uri, java.io.InputStream is)` Parse the specified XML document, and return a `TreeNode` that corresponds to the root node of the document tree.
`void` | `setClassLoader(java.lang.ClassLoader classLoader)` Set the class loader used to access our XML parser.

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

Field Detail

### classLoader

    protected java.lang.ClassLoader classLoader

  The class loader to use for accessing our XML parser.

### errorHandler

    protected org.xml.sax.ErrorHandler errorHandler

  An error handler for use when parsing XML documents.

### entityResolver

    protected org.xml.sax.EntityResolver entityResolver

  An entity resolver for use when parsing XML documents.

Constructor Detail

### ParserUtils

    public ParserUtils()

Method Detail

### main

    public static void main(java.lang.String[] args)

  Usage: java org.apache.jasper.parser.ParserUtils {pathname}

### getClassLoader

    public java.lang.ClassLoader getClassLoader()

  Return the class loader used to access our XML parser.

### parseXMLDocument

    public TreeNode parseXMLDocument(java.lang.String uri,
                                     java.io.InputStream is)
                              throws JasperException

  Parse the specified XML document, and return a `TreeNode` that corresponds to the root node of the document tree.

  Parameters:
    `uri` - URI of the XML document being parsed
    `is` - Input stream containing the deployment descriptor
  Throws:
    `JasperException` - if an input/output error occurs
    `JasperException` - if a parsing error occurs

### setClassLoader

    public void setClassLoader(java.lang.ClassLoader classLoader)

  Set the class loader used to access our XML parser.

  Parameters:
    `classLoader` - The new class loader

### convert

    protected TreeNode convert(TreeNode parent,
                               org.w3c.dom.Node node)

  Create and return a TreeNode that corresponds to the specified Node, including processing all of the attributes and children nodes.

  Parameters:
    `parent` - The parent TreeNode (if any) for the new TreeNode
    `node` - The XML document Node to be converted

### createParserUtils

    public static ParserUtils createParserUtils(java.lang.ClassLoader parentLoader)

  Create (if necessary) and return an instance of ParserUtils that has been loaded by our subordinate class loader (and therefore should have access to the XML parser that is visible to repositories of that class loader).

  Parameters:
    `parentLoader` - The web application class loader

### createClassLoader

    public static java.lang.ClassLoader createClassLoader(java.lang.ClassLoader parentLoader)
                                                   throws java.net.MalformedURLException

  Construct (if necessary) and return a class loader that has been configured with the specified parent class loader, and repositories as needed to access the required XML parser.

  Parameters:
    `parentLoader` - The web application class loader
  Throws:
    `java.net.MalformedURLException` - if we cannot create a valid URL for one of the required repositories

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