org.exist.xquery
Class LetExpr
java.lang.Object
org.exist.xquery.AbstractExpression
org.exist.xquery.BindingExpression
org.exist.xquery.LetExpr
- All Implemented Interfaces:
- Expression
public class LetExpr
- extends BindingExpression
Implements an XQuery let-expression.
- Author:
- Wolfgang Meier
Fields inherited from interface org.exist.xquery.Expression |
DOT_TEST, EXPRESSION_ID_INVALID, IGNORE_CONTEXT, IN_NODE_CONSTRUCTOR, IN_PREDICATE, IN_UPDATE, IN_WHERE_CLAUSE, NEED_INDEX_INFO, NO_CONTEXT_ID, SINGLE_STEP_EXECUTION, USE_TREE_TRAVERSAL |
Methods inherited from class org.exist.xquery.BindingExpression |
analyze, eval, getDependencies, getInputSequence, getReturnExpression, getVariable, getWhereExpression, preselect, resetState, setGroupReturnExpr, setGroupSpecs, setGroupVariable, setInputSequence, setOrderSpecs, setReturnExpression, setSequenceType, setToGroupVariable, setVariable, setWhereExpression |
LetExpr
public LetExpr(XQueryContext context)
analyze
public void analyze(AnalyzeContextInfo contextInfo,
OrderSpec[] orderBy,
GroupSpec[] groupBy)
throws XPathException
- Specified by:
analyze
in class BindingExpression
- Throws:
XPathException
eval
public Sequence eval(Sequence contextSequence,
Item contextItem,
Sequence resultSequence,
GroupedValueSequenceTable groupedSequence)
throws XPathException
- Specified by:
eval
in class BindingExpression
- Throws:
XPathException
returnsType
public int returnsType()
- Description copied from interface:
Expression
- The static return type of the expression.
This method should return one of the type constants defined in class
Type
. If the return type cannot be determined
statically, return Type.ITEM.
- Specified by:
returnsType
in interface Expression
- Specified by:
returnsType
in class AbstractExpression
dump
public void dump(ExpressionDumper dumper)
- Description copied from interface:
Expression
- Write a diagnostic dump of the expression to the passed
ExpressionDumper
.
- Parameters:
dumper
- the expression dumper to write to
toString
public String toString()
- Overrides:
toString
in class Object
accept
public void accept(ExpressionVisitor visitor)
- Description copied from interface:
Expression
- Start traversing the expression tree using the specified
ExpressionVisitor
.
- Specified by:
accept
in interface Expression
- Overrides:
accept
in class AbstractExpression
Copyright (C) Wolfgang Meier. All rights reserved.