| java.lang.Object
 org.apache.xerces.impl.dtd.models.DFAContentModel
| DFAContentModel | | public class DFAContentModel implements ContentModelValidator(Code) | | 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.
version:
$Id: DFAContentModel.java 572057 2007-09-02 18:03:20Z mrglavas $ |
| Constructor Summary | |
| public | DFAContentModel(CMNode syntaxTree, int leafCount, boolean mixed)
Constructs a DFA content model. |
| Method Summary | |
| public int | validate(QName[] children, int offset, int length)
Check that the specified content is valid according to this
content model. |
| DFAContentModel | | public DFAContentModel(CMNode syntaxTree, int leafCount, boolean mixed)(Code) | | Constructs a DFA content model.
Parameters:
syntaxTree - The syntax tree of the content model.
Parameters:
leafCount - The number of leaves.
Parameters:
mixed - |
| validate | | public int validate(QName[] children, int offset, int length)(Code) | | 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
confirmed.
Parameters:
children - The children of this element. Each integer is an index withinthe StringPool of the child element name. An indexof -1 is used to indicate an occurrence of non-whitespace characterdata.
Parameters:
offset - Offset into the array where the children starts.
Parameters:
length - The number of entries in the children array. The value -1 if fully valid, else the 0 based index of the childthat first failed. If the value returned is equal to the numberof children, then the specified children are valid but additionalcontent is required to reach a valid ending state. |
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