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java.lang.Objectorg.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.expr.Single
org.basex.query.expr.Extension
public final class Extension
Pragma extension.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.basex.query.expr.Expr |
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Expr.Flag |
Field Summary |
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Fields inherited from class org.basex.query.expr.Single |
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expr |
Fields inherited from class org.basex.query.expr.ParseExpr |
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info, size, type |
Constructor Summary | |
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Extension(InputInfo ii,
Pragma[] prag,
Expr e)
Constructor. |
Method Summary | |
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void |
checkUp()
Checks if all updating expressions are correctly placed. |
Expr |
compile(QueryContext ctx,
VarScope scp)
Compiles and optimizes the expression, assigns data types and cardinalities. |
Expr |
copy(QueryContext ctx,
VarScope scp,
IntObjMap<Var> vs)
Copies an expression. |
ValueIter |
iter(QueryContext ctx)
Evaluates the expression and returns an iterator on the resulting items. |
Expr |
markTailCalls()
Finds and marks tail calls, enabling TCO. |
void |
plan(FElem plan)
Creates an expression tree. |
java.lang.String |
toString()
|
Value |
value(QueryContext ctx)
Evaluates the expression and returns the resulting value. |
Methods inherited from class org.basex.query.expr.Single |
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accept, count, exprSize, has, inline, removable |
Methods inherited from class org.basex.query.expr.ParseExpr |
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checkAdmin, checkAllUp, checkBinary, checkBln, checkColl, checkCreate, checkCtx, checkDbl, checkDBNode, checkEStr, checkEStr, checkFunc, checkItem, checkItr, checkItr, checkMap, checkNode, checkNode, checkNode, checkNoEmpty, checkNoneUp, checkNoUp, checkQNm, checkStr, checkStr, checkStrBin, checkType, checkWrite, compBln, copyType, ebv, item, optPre, preEval, size, test, type |
Methods inherited from class org.basex.query.expr.Expr |
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addText, compEbv, copy, hasFreeVars, indexAccessible, indexEquivalent, inlineAll, isEmpty, isFunction, isItem, isVacuous, isValue, iterable, optimize, sameAs, uses, visitAll |
Methods inherited from class org.basex.data.ExprInfo |
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addPlan, addPlan, description, info, planAttr, planElem |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Constructor Detail |
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public Extension(InputInfo ii, Pragma[] prag, Expr e)
ii
- input infoprag
- pragmase
- enclosed expressionMethod Detail |
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public void checkUp() throws QueryException
Expr
checkUp
in class Single
QueryException
- query exceptionpublic Expr compile(QueryContext ctx, VarScope scp) throws QueryException
Expr
compile
in class Single
ctx
- query contextscp
- variable scope
QueryException
- query exceptionpublic ValueIter iter(QueryContext ctx) throws QueryException
Expr
Expr.item(org.basex.query.QueryContext, org.basex.util.InputInfo)
must be implemented
by an expression, as it may be called by this method.
iter
in class ParseExpr
ctx
- query context
QueryException
- query exceptionpublic Value value(QueryContext ctx) throws QueryException
Expr
value
in class ParseExpr
ctx
- query context
QueryException
- query exceptionpublic Expr copy(QueryContext ctx, VarScope scp, IntObjMap<Var> vs)
Expr
copy
in class Expr
ctx
- query contextscp
- variable scope for creating new variablesvs
- mapping from old variable IDs to new variable copies
public void plan(FElem plan)
ExprInfo
plan
in class Single
plan
- root elementpublic java.lang.String toString()
toString
in class ExprInfo
public Expr markTailCalls()
Expr
markTailCalls
in class Expr
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