Java API for XML Processing Specification 1.1: Interface XMLFilter

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## org.xml.sax
Interface XMLFilter

All Superinterfaces:
  XMLReader

All Known Implementing Classes:
  XMLFilterImpl

public interface XMLFilter
extends XMLReader

Interface for an XML filter.

> This module, both source code and documentation, is in the Public Domain, and comes with NO WARRANTY.

An XML filter is like an XML reader, except that it obtains its events from another XML reader rather than a primary source like an XML document or database. Filters can modify a stream of events as they pass on to the final application.

The XMLFilterImpl helper class provides a convenient base for creating SAX2 filters, by passing on all `EntityResolver`, `DTDHandler`, `ContentHandler` and `ErrorHandler` events automatically.

Since:
  SAX 2.0
Version:
  2.0r2pre
Author:
  David Megginson, sax@megginson.com
See Also:
  `XMLFilterImpl`

Method Summary
`XMLReader` | `getParent()` Get the parent reader.
`void` | `setParent(XMLReader parent)` Set the parent reader.

Methods inherited from interface org.xml.sax.XMLReader
`getContentHandler, getDTDHandler, getEntityResolver, getErrorHandler, getFeature, getProperty, parse, parse, setContentHandler, setDTDHandler, setEntityResolver, setErrorHandler, setFeature, setProperty`

Method Detail

### setParent

    public void setParent(XMLReader parent)

  Set the parent reader.

  This method allows the application to link the filter to a parent reader (which may be another filter). The argument may not be null.

  Parameters:
    `parent` - The parent reader.

### getParent

    public XMLReader getParent()

  Get the parent reader.

  This method allows the application to query the parent reader (which may be another filter). It is generally a bad idea to perform any operations on the parent reader directly: they should all pass through this filter.

  Returns:
    The parent filter, or null if none has been set.

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