Class SimpleContentModel
java.lang.Object
org.apache.xerces.impl.dtd.models.SimpleContentModel
- All Implemented Interfaces:
ContentModelValidator
SimpleContentModel is a derivative of the abstract content model base
class that handles a small set of simple content models that are just
way overkill to give the DFA treatment.
This class handles the following scenarios:
- a
- a?
- a*
- a+
- a,b
- a|b
These all involve a unary operation with one element type, or a binary operation with two elements. These are very simple and can be checked in a simple way without a DFA and without the overhead of setting up a DFA for such a simple check.
INTERNAL:
- Usage of this class is not supported. It may be altered or removed at any time.
- Version:
- $Id: SimpleContentModel.java 699892 2008-09-28 21:08:27Z mrglavas $
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Field Summary
Fields -
Constructor Summary
ConstructorsConstructorDescriptionSimpleContentModel
(short operator, org.apache.xerces.xni.QName firstChild, org.apache.xerces.xni.QName secondChild) Constructs a simple content model. -
Method Summary
Modifier and TypeMethodDescriptionint
validate
(org.apache.xerces.xni.QName[] children, int offset, int length) Check that the specified content is valid according to this content model.
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Field Details
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CHOICE
public static final short CHOICECHOICE- See Also:
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SEQUENCE
public static final short SEQUENCESEQUENCE- See Also:
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Constructor Details
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SimpleContentModel
public SimpleContentModel(short operator, org.apache.xerces.xni.QName firstChild, org.apache.xerces.xni.QName secondChild) Constructs a simple content model.- Parameters:
operator
- The content model operator.firstChild
- qualified name of the first childsecondChild
- qualified name of the second child
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Method Details
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validate
public int validate(org.apache.xerces.xni.QName[] children, int offset, int length) 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.
- Specified by:
validate
in interfaceContentModelValidator
- Parameters:
children
- The children of this element. Each integer is an index within theStringPool
of the child element name. An index of -1 is used to indicate an occurrence of non-whitespace character data.offset
- Offset into the array where the children starts.length
- The number of entries in thechildren
array.- Returns:
- 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.
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