/**
* Create a OneStepIterator object.
*
* @param compiler A reference to the Compiler that contains the op map.
* @param opPos The position within the op map, which contains the location path expression for
* this itterator.
* @throws javax.xml.transform.TransformerException
*/
OneStepIterator(Compiler compiler, int opPos, int analysis)
throws javax.xml.transform.TransformerException {
super(compiler, opPos, analysis);
int firstStepPos = compiler.getFirstChildPos(opPos);
m_axis = WalkerFactory.getAxisFromStep(compiler, firstStepPos);
}
/**
* Create a UnionPathIterator object, including creation of location path iterators from the
* opcode list, and call back into the Compiler to create predicate expressions.
*
* @param compiler The Compiler which is creating this expression.
* @param opPos The position of this iterator in the opcode list from the compiler.
* @throws javax.xml.transform.TransformerException
*/
public UnionPathIterator(Compiler compiler, int opPos)
throws javax.xml.transform.TransformerException {
super();
opPos = compiler.getFirstChildPos(opPos);
loadLocationPaths(compiler, opPos, 0);
}
/**
* Create a WalkingIterator iterator, including creation of step walkers from the opcode list, and
* call back into the Compiler to create predicate expressions.
*
* @param compiler The Compiler which is creating this expression.
* @param opPos The position of this iterator in the opcode list from the compiler.
* @param shouldLoadWalkers True if walkers should be loaded, or false if this is a derived
* iterator and it doesn't wish to load child walkers.
* @throws javax.xml.transform.TransformerException
*/
WalkingIterator(Compiler compiler, int opPos, int analysis, boolean shouldLoadWalkers)
throws javax.xml.transform.TransformerException {
super(compiler, opPos, analysis, shouldLoadWalkers);
int firstStepPos = compiler.getFirstChildPos(opPos);
if (shouldLoadWalkers) {
m_firstWalker = WalkerFactory.loadWalkers(this, compiler, firstStepPos, 0);
m_lastUsedWalker = m_firstWalker;
}
}