- All Implemented Interfaces:
- public class DFAContentModel
- extends java.lang.Object
- implements ContentModelValidator
DFAContentModel is the derivative of ContentModel that does
all of the non-trivial element content validation. This class does
the conversion from the regular expression to the DFA that
it then uses in its validation algorithm.
Note: Upstream work insures that this class will never see
a content model with PCDATA in it. Any model with PCDATA is 'mixed'
and is handled via the MixedContentModel class since mixed models
are very constrained in form and easily handled via a special case.
This also makes implementation of this class much easier.
- Usage of this class is not supported. It may be altered or removed at any time.
- $Id: DFAContentModel.java 572057 2007-09-02 18:03:20Z mrglavas $
Constructs a DFA content model.
Check that the specified content is valid according to this
|Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
public DFAContentModel(CMNode syntaxTree,
- Constructs a DFA content model.
syntaxTree - The syntax tree of the content model.
leafCount - The number of leaves.
public int validate(org.apache.xerces.xni.QName children,
- Check that the specified content is valid according to this
content model. This method can also be called to do 'what if'
testing of content models just to see if they would be valid.
A value of -1 in the children array indicates a PCDATA node. All other
indexes will be positive and represent child elements. The count can be
zero, since some elements have the EMPTY content model and that must be
- Specified by:
validate in interface
children - The children of this element. Each integer is an index within
StringPool of the child element name. An index
of -1 is used to indicate an occurrence of non-whitespace character
offset - Offset into the array where the children starts.
length - The number of entries in the
- The value -1 if fully valid, else the 0 based index of the child
that first failed. If the value returned is equal to the number
of children, then the specified children are valid but additional
content is required to reach a valid ending state.
Copyright © 1999-2018 The Apache Software Foundation. All Rights Reserved.