ch.ethz.mxquery.iterators
Class LogicalIterator

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

All Implemented Interfaces:

XDMIterator, Traversable

public class LogicalIterator
extends TokenBasedIterator

Field Summary

static int	AND constants *
static int	OR

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

LogicalIterator(Context ctx, int type, XDMIterator[] subIters, QueryLocation location)
Constructor for the LogicalIterator

Method Summary

XDMIterator	getLeftChild()
int	getOperatorType()
XDMIterator	getRightChild()
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

Field Detail

AND

public static final int AND

constants *

See Also:

Constant Field Values

OR

public static final int OR

See Also:

Constant Field Values

Constructor Detail

LogicalIterator

public LogicalIterator(Context ctx,
                       int type,
                       XDMIterator[] subIters,
                       QueryLocation location)
                throws MXQueryException

Constructor for the LogicalIterator

Parameters:

type - indicates the type of the logical expression (AND | OR)

subIters - Array of Expressions, which are connected with AND / OR depending on type.

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*

getOperatorType

public int getOperatorType()

getLeftChild

public XDMIterator getLeftChild()

getRightChild

public XDMIterator getRightChild()