ch.ethz.mxquery.iterators
Class XMLContent

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

All Implemented Interfaces:

Source, XDMIterator, Traversable

public class XMLContent
extends CurrentBasedIterator
implements Source

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

XMLContent(Context ctx, XDMIterator[] subIters, boolean[] enclExpr, int depth, QueryLocation location, XDMScope nsScope, boolean compElemConst)

Method Summary

int	compare(Source store)
static QName	computeElemQName(XQStaticContext context, XDMIterator it, QueryLocation loc)
XDMIterator	copy(Context parentIterContext, XQStaticContext prevParentIterContext, boolean copyContext, java.util.Vector nestedPredCtxStack) Copies the Iterator.
Source	copySource(Context ctx, java.util.Vector nestedPredCtxStack)
Window	getIterator(Context ctx) Returns Iterator that points on the first token in the store.
java.lang.String	getURI() Returns the URI of the source.
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.
void	setResettable(boolean r) Set this Iterator (and its subiterators) resetable.

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

addPredicates, close, 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, 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

XMLContent

public XMLContent(Context ctx,
                  XDMIterator[] subIters,
                  boolean[] enclExpr,
                  int depth,
                  QueryLocation location,
                  XDMScope nsScope,
                  boolean compElemConst)
           throws MXQueryException

Throws:

MXQueryException

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.

Specified by:

next in interface XDMIterator

Returns:

The XDM token representing the next fragment of the XDM instance

Throws:

MXQueryException

computeElemQName

public static QName computeElemQName(XQStaticContext context,
                                     XDMIterator it,
                                     QueryLocation loc)
                              throws MXQueryException

Throws:

MXQueryException

setResettable

public void setResettable(boolean r)
                   throws MXQueryException

Description copied from interface: XDMIterator

Set this Iterator (and its subiterators) resetable. Resetable iterators may require more space (trading buffered data against recomputation)

Specified by:

setResettable in interface XDMIterator

Overrides:

setResettable in class Iterator

Parameters:

r - true make this iterator resetable, false make it not resetable

Throws:

MXQueryException

compare

public int compare(Source store)

Specified by:

compare in interface Source

getURI

public java.lang.String getURI()

Description copied from interface: Source

Returns the URI of the source.

Specified by:

getURI in interface Source

Returns:

a String representing the URI/Identifier of this source

copy

public XDMIterator copy(Context parentIterContext,
                        XQStaticContext prevParentIterContext,
                        boolean copyContext,
                        java.util.Vector nestedPredCtxStack)
                 throws MXQueryException

Description copied from interface: XDMIterator

Copies the Iterator. The context is copied (if necessary) here. The subIterators are copied (if existing) here.

Specified by:

copy in interface XDMIterator

Overrides:

copy in class Iterator

Parameters:

parentIterContext - The new parent context

prevParentIterContext - The previous context of the parent iterator

copyContext - Copy the context or use the parent context

nestedPredCtxStack - The Stack of nested predicate context, needed for nested rewritten predicates

Returns:

A copy of this Iterator

Throws:

MXQueryException

copySource

public Source copySource(Context ctx,
                         java.util.Vector nestedPredCtxStack)
                  throws MXQueryException

Specified by:

copySource in interface Source

Throws:

MXQueryException

getIterator

public Window getIterator(Context ctx)
                   throws MXQueryException

Description copied from interface: Source

Returns Iterator that points on the first token in the store.

Specified by:

getIterator in interface Source

Returns:

Iterator a (Window) Iterator to access the contents of this source

Throws:

MXQueryException