ch.ethz.mxquery.iterators
Class ChildIterator

java.lang.Object
  ch.ethz.mxquery.model.Iterator
      ch.ethz.mxquery.model.CurrentBasedIterator
          ch.ethz.mxquery.iterators.ChildIterator

All Implemented Interfaces:

XDMIterator, Traversable

public class ChildIterator
extends CurrentBasedIterator

Field Summary

Fields inherited from interface ch.ethz.mxquery.model.XDMIterator

EXPR_CATEGORY_SEQUENTIAL, EXPR_CATEGORY_SIMPLE, EXPR_CATEGORY_UPDATING, EXPR_CATEGORY_VACUOUS, EXPR_PARAM_CHEAPEVAL, EXPR_PARAM_VARIABLE, EXPR_PARAM_WINDOW, EXPR_PARAM_XDMGEN

Constructor Summary

ChildIterator(Context ctx, java.lang.String step, XDMIterator[] subIters, QueryLocation location)

ChildIterator(Context ctx, TypeInfo stepD, QueryLocation location)

Method Summary

java.lang.String	getStepName()
Token	next() Produces the next XDM token This method typically implements the base functionality of an Iterator and computes the value of the next token.

Methods inherited from class ch.ethz.mxquery.model.Iterator

addPredicates, close, copy, copyInts, copyIterators, copyQNames, copyStrings, copyTypeInfos, getAllSubIters, getAllSubItersRecursive, getContext, getExpressionCategoryType, getLoc, getPendingUpdateList, getPredicates, getStaticType, getSubIters, hasPredicates, isConstModePreserve, isExprParameter, isOpen, isResettable, removePredicates, reset, setConstModePreserve, setContext, setLoc, setOrderByExpr, setParam, setResettable, setReturnExpr, setSubIters, setSubIters, setSubIters, setWhereExpr, traverse, traverseIteratorTree

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ChildIterator

public ChildIterator(Context ctx,
                     java.lang.String step,
                     XDMIterator[] subIters,
                     QueryLocation location)
              throws MXQueryException

Throws:

MXQueryException

ChildIterator

public ChildIterator(Context ctx,
                     TypeInfo stepD,
                     QueryLocation location)
              throws MXQueryException

Throws:

MXQueryException

Method Detail

getStepName

public java.lang.String getStepName()

next

public Token next()
           throws MXQueryException

Description copied from interface: XDMIterator

Produces the next XDM token This method typically implements the base functionality of an Iterator and computes the value of the next token.

Returns:

The XDM token representing the next fragment of the XDM instance

Throws:

MXQueryException