org.jfree.xml

## Class Parser

- java.lang.Object
- - org.xml.sax.helpers.DefaultHandler
  - - org.jfree.xml.FrontendDefaultHandler
    - - org.jfree.xml.Parser

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable, Configuration, org.xml.sax.ContentHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler

    public abstract class Parser
    extends FrontendDefaultHandler

The Parser handles the SAXEvents and forwards the event call to the currently active ElementDefinitionHandler. Contains methods to manage and configure the parsing process.

An initial report definition handler must be set before the parser can be used.

Author:
  Thomas Morgner
See Also:
  Serialized Form

### Field Summary

Fields
`static java.lang.String` `CONTENTBASE_KEY` A key for the content base.

### Constructor Summary

Constructors
Constructor and Description
`Parser()` Creates a new parser.

### Method Summary

Methods
`void` `characters(char[] ch, int start, int length)` Receive notification of character data inside an element.
`void` `endDocument()` Receive notification of the end of the document.
`void` `endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName)` Receive notification of the end of an element.
`java.lang.String[]` `getComments()` Returns the currently collected comments.
`java.lang.Object` `getHelperObject(java.lang.String key)` Returns a helper object.
`ElementDefinitionHandler` `getInitialFactory()` Returns the initial handler.
`abstract Parser` `getInstance()` Returns a new instance of the parser.
`abstract java.lang.Object` `getResult()` Returns the parsed result object after the parsing is complete.
`FrontendDefaultHandler` `newInstance()` Returns a new instance of `FrontendDefaultHandler`.
`ElementDefinitionHandler` `peekFactory()` Reads a handler off the stack without removing it.
`ElementDefinitionHandler` `popFactory()` Pops a handler from the stack.
`void` `pushFactory(ElementDefinitionHandler factory)` Pushes a handler onto the stack.
`void` `setHelperObject(java.lang.String key, java.lang.Object value)` Sets a helper object.
`void` `setInitialFactory(ElementDefinitionHandler factory)` Sets the initial handler.
`void` `startDocument()` Receive notification of the beginning of the document.
`void` `startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes attributes)` Receive notification of the start of an element.

### Methods inherited from class org.jfree.xml.FrontendDefaultHandler

`clone, findPropertyKeys, getCommentHandler, getConfigProperties, getConfigProperty, getConfigProperty, getContentBase, getLocator, setConfigProperty, setDocumentLocator`

### Methods inherited from class org.xml.sax.helpers.DefaultHandler

`endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, skippedEntity, startPrefixMapping, unparsedEntityDecl, warning`

### Methods inherited from class java.lang.Object

`equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

### Field Detail

#### CONTENTBASE_KEY

    public static final java.lang.String CONTENTBASE_KEY

A key for the content base.

See Also:
  Constant Field Values

### Constructor Detail

#### Parser

    public Parser()

Creates a new parser.

### Method Detail

#### getComments

    public java.lang.String[] getComments()

Returns the currently collected comments.

Returns:
  the comments.

#### pushFactory

    public void pushFactory(ElementDefinitionHandler factory)

Pushes a handler onto the stack.

Parameters:
  `factory` - the handler.

#### peekFactory

    public ElementDefinitionHandler peekFactory()

Reads a handler off the stack without removing it.

Returns:
  The handler.

#### popFactory

    public ElementDefinitionHandler popFactory()

Pops a handler from the stack.

Returns:
  The handler.

#### endDocument

    public void endDocument()
                     throws org.xml.sax.SAXException

Receive notification of the end of the document.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of a document (such as finalising a tree or closing an output file).

Specified by:
  `endDocument` in interface `org.xml.sax.ContentHandler`
Overrides:
  `endDocument` in class `org.xml.sax.helpers.DefaultHandler`
Throws:
  `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
See Also:
  `ContentHandler.endDocument()`

#### startDocument

    public void startDocument()
                       throws org.xml.sax.SAXException

Receive notification of the beginning of the document.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the beginning of a document (such as allocating the root node of a tree or creating an output file).

Specified by:
  `startDocument` in interface `org.xml.sax.ContentHandler`
Overrides:
  `startDocument` in class `org.xml.sax.helpers.DefaultHandler`
Throws:
  `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
See Also:
  `ContentHandler.startDocument()`

#### characters

    public void characters(char[] ch,
                  int start,
                  int length)
                    throws org.xml.sax.SAXException

Receive notification of character data inside an element.

By default, do nothing. Application writers may override this method to take specific actions for each chunk of character data (such as adding the data to a node or buffer, or printing it to a file).

Specified by:
  `characters` in interface `org.xml.sax.ContentHandler`
Overrides:
  `characters` in class `org.xml.sax.helpers.DefaultHandler`
Parameters:
  `ch` - the characters.
  `start` - the start position in the character array.
  `length` - the number of characters to use from the character array.
Throws:
  `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
See Also:
  `ContentHandler.characters(char[], int, int)`

#### endElement

    public void endElement(java.lang.String uri,
                  java.lang.String localName,
                  java.lang.String qName)
                    throws org.xml.sax.SAXException

Receive notification of the end of an element.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the end of each element (such as finalising a tree node or writing output to a file).

Specified by:
  `endElement` in interface `org.xml.sax.ContentHandler`
Overrides:
  `endElement` in class `org.xml.sax.helpers.DefaultHandler`
Parameters:
  `uri` - the URI.
  `localName` - the element type name.
  `qName` - the name.
Throws:
  `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
See Also:
  `ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)`

#### startElement

    public void startElement(java.lang.String uri,
                    java.lang.String localName,
                    java.lang.String qName,
                    org.xml.sax.Attributes attributes)
                      throws org.xml.sax.SAXException

Receive notification of the start of an element.

By default, do nothing. Application writers may override this method in a subclass to take specific actions at the start of each element (such as allocating a new tree node or writing output to a file).

Specified by:
  `startElement` in interface `org.xml.sax.ContentHandler`
Overrides:
  `startElement` in class `org.xml.sax.helpers.DefaultHandler`
Parameters:
  `uri` - the URI.
  `localName` - the element type name.
  `qName` - the name.
  `attributes` - the specified or defaulted attributes.
Throws:
  `org.xml.sax.SAXException` - Any SAX exception, possibly wrapping another exception.
See Also:
  `ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)`

#### setInitialFactory

    public void setInitialFactory(ElementDefinitionHandler factory)

Sets the initial handler.

Parameters:
  `factory` - the initial handler.

#### getInitialFactory

    public ElementDefinitionHandler getInitialFactory()

Returns the initial handler.

Returns:
  The initial handler.

#### setHelperObject

    public void setHelperObject(java.lang.String key,
                       java.lang.Object value)

Sets a helper object.

Parameters:
  `key` - the key.
  `value` - the value.

#### getHelperObject

    public java.lang.Object getHelperObject(java.lang.String key)

Returns a helper object.

Parameters:
  `key` - the key.
Returns:
  The object.

#### getInstance

    public abstract Parser getInstance()

Returns a new instance of the parser.

Returns:
  a new instance of the parser.

#### newInstance

    public final FrontendDefaultHandler newInstance()

Returns a new instance of `FrontendDefaultHandler`.

Specified by:
  `newInstance` in class `FrontendDefaultHandler`
Returns:
  A new instance.

#### getResult

    public abstract java.lang.Object getResult()

Returns the parsed result object after the parsing is complete. Calling this function during the parsing is undefined and may result in an IllegalStateException.

Specified by:
  `getResult` in class `FrontendDefaultHandler`
Returns:
  the parsed result.