ch.ethz.mxquery.iterators
Class UnionIterator

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

All Implemented Interfaces:

XDMIterator, Traversable

public class UnionIterator
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

UnionIterator(Context ctx, XDMIterator iter1, XDMIterator iter2, QueryLocation location)
Input are two iterators on which union needs to be done

Method Summary

Token

next() Precondition: inputs are sorted in the document order

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

UnionIterator

public UnionIterator(Context ctx,
                     XDMIterator iter1,
                     XDMIterator iter2,
                     QueryLocation location)

Input are two iterators on which union needs to be done

Parameters:

iter1 -

iter2 -

Method Detail

next

public Token next()
           throws MXQueryException

Precondition: inputs are sorted in the document order

Returns:

The XDM token representing the next fragment of the XDM instance

Throws:

MXQueryException