File	Doc	Category	Size	Date	Package
SimpleContentModel.java	API Doc	Apache Xerces 3.0.1	9851	Fri Sep 14 20:33:56 BST 2007	org.apache.xerces.impl.dtd.models

SimpleContentModel

• java.lang.Object

Fields Summary
public static final short	CHOICE CHOICE
public static final short	SEQUENCE SEQUENCE
private final org.apache.xerces.xni.QName	fFirstChild The element decl pool indices of the first (and optional second) child node. The operation code tells us whether the second child is used or not.
private final org.apache.xerces.xni.QName	fSecondChild The element decl pool indices of the first (and optional second) child node. The operation code tells us whether the second child is used or not.
private final int	fOperator The operation that this object represents. Since this class only does simple contents, there is only ever a single operation involved (i.e. the children of the operation are always one or two leafs.) This is one of the XMLDTDParams.CONTENTSPECNODE_XXX values.

Constructors Summary

public SimpleContentModel(short operator, org.apache.xerces.xni.QName firstChild, org.apache.xerces.xni.QName secondChild) Constructs a simple content model. param operator The content model operator. param firstChild qualified name of the first child param secondChild qualified name of the second child /* this is the EquivClassComparator object */ //private EquivClassComparator comparator = null; // // Constructors // // // Store away the children and operation. This is all we need to // do the content model check. // // The operation is one of the ContentSpecNode.NODE_XXX values! // fFirstChild.setValues(firstChild); if (secondChild != null) { fSecondChild.setValues(secondChild); } else { fSecondChild.clear(); } fOperator = operator;

Methods Summary

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. param children The children of this element. Each integer is an index within the StringPool of the child element name. An index of -1 is used to indicate an occurrence of non-whitespace character data. param offset Offset into the array where the children starts. param length The number of entries in the children array. return 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. // // According to the type of operation, we do the correct type of // content check. // switch(fOperator) { case XMLContentSpec.CONTENTSPECNODE_LEAF : // If there is not a child, then report an error at index 0 if (length == 0) return 0; // If the 0th child is not the right kind, report an error at 0 if (children[offset].rawname != fFirstChild.rawname) { return 0; } // If more than one child, report an error at index 1 if (length > 1) return 1; break; case XMLContentSpec.CONTENTSPECNODE_ZERO_OR_ONE : // // If there is one child, make sure its the right type. If not, // then its an error at index 0. // if (length == 1) { if (children[offset].rawname != fFirstChild.rawname) { return 0; } } // // If the child count is greater than one, then obviously // bad, so report an error at index 1. // if (length > 1) return 1; break; case XMLContentSpec.CONTENTSPECNODE_ZERO_OR_MORE : // // If the child count is zero, that's fine. If its more than // zero, then make sure that all children are of the element // type that we stored. If not, report the index of the first // failed one. // if (length > 0) { for (int index = 0; index < length; index++) { if (children[offset + index].rawname != fFirstChild.rawname) { return index; } } } break; case XMLContentSpec.CONTENTSPECNODE_ONE_OR_MORE : // // If the child count is zero, that's an error so report // an error at index 0. // if (length == 0) return 0; // // Otherwise we have to check them all to make sure that they // are of the correct child type. If not, then report the index // of the first one that is not. // for (int index = 0; index < length; index++) { if (children[offset + index].rawname != fFirstChild.rawname) { return index; } } break; case XMLContentSpec.CONTENTSPECNODE_CHOICE : // // There must be one and only one child, so if the element count // is zero, return an error at index 0. // if (length == 0) return 0; // If the zeroth element isn't one of our choices, error at 0 if ((children[offset].rawname != fFirstChild.rawname) && (children[offset].rawname != fSecondChild.rawname)) { return 0; } // If there is more than one element, then an error at 1 if (length > 1) return 1; break; case XMLContentSpec.CONTENTSPECNODE_SEQ : // // There must be two children and they must be the two values // we stored, in the stored order. // if (length == 2) { if (children[offset].rawname != fFirstChild.rawname) { return 0; } if (children[offset + 1].rawname != fSecondChild.rawname) { return 1; } } else { if (length > 2) { return 2; } return length; } break; default : throw new RuntimeException("ImplementationMessages.VAL_CST"); } // We survived, so return success status return -1;