ch.ethz.mxquery.iterators
Class InstanceOfIterator

java.lang.Object
  ch.ethz.mxquery.model.Iterator
      ch.ethz.mxquery.model.TokenBasedIterator
          ch.ethz.mxquery.iterators.InstanceOfIterator

All Implemented Interfaces:

XDMIterator, Traversable

public class InstanceOfIterator
extends TokenBasedIterator

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

InstanceOfIterator(Context ctx, XDMIterator seqTypeIt, QueryLocation location)

Method Summary

TypeInfo

getStaticType() Return the return type if it can be statically determined

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

next

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

addPredicates, close, copy, copyInts, copyIterators, copyQNames, copyStrings, copyTypeInfos, getAllSubIters, getAllSubItersRecursive, getContext, getExpressionCategoryType, getLoc, getPendingUpdateList, getPredicates, 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

InstanceOfIterator

public InstanceOfIterator(Context ctx,
                          XDMIterator seqTypeIt,
                          QueryLocation location)
                   throws MXQueryException

Throws:

MXQueryException

Method Detail

getStaticType

public TypeInfo getStaticType()

Description copied from interface: XDMIterator

Return the return type if it can be statically determined

Specified by:

getStaticType in interface XDMIterator

Overrides:

getStaticType in class Iterator

Returns:

a Type info carrying the most precise static type that could be determined. If no specific type could be determined, the type is ITEM*