ch.ethz.mxquery.iterators
Class FFLWORIterator.CFAdapter

java.lang.Object
  ch.ethz.mxquery.model.Iterator
      ch.ethz.mxquery.model.CurrentBasedIterator
          ch.ethz.mxquery.iterators.FFLWORIterator.CFAdapter

All Implemented Interfaces:

XDMIterator, Traversable

Enclosing class:

FFLWORIterator

public class FFLWORIterator.CFAdapter
extends CurrentBasedIterator

This Adapter is needed to enable break and continue during return-materialization in order by. The only thing this class does it to return Iterator.END_SEQUENCE when a break/continue happens => it catches the error. If a break or catch happend is accessible over getters.

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

FFLWORIterator.CFAdapter(XDMIterator iter)

Method Summary

boolean	isBreakCatched()
boolean	isContinueCatched()
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

FFLWORIterator.CFAdapter

public FFLWORIterator.CFAdapter(XDMIterator iter)

Method Detail

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

isBreakCatched

public boolean isBreakCatched()

isContinueCatched

public boolean isContinueCatched()