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java.lang.Objectorg.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.expr.Arr
org.basex.query.expr.List
public final class List
Expression list.
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.Arr |
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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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List(InputInfo ii,
Expr... l)
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. |
boolean |
isVacuous()
Tests if this is a vacuous expression (empty sequence or error function). |
Iter |
iter(QueryContext ctx)
Evaluates the expression and returns an iterator on the resulting items. |
Expr |
optimize(QueryContext ctx,
VarScope scp)
Optimizes an already compiled expression without recompiling its sub-expressions. |
java.lang.String |
toString()
|
Value |
value(QueryContext ctx)
Evaluates the expression and returns the resulting value. |
Methods inherited from class org.basex.query.expr.Arr |
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accept, allAreValues, checkNoUp, copyAll, count, exprSize, has, indexEquivalent, inline, plan, removable, toString |
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, inlineAll, isEmpty, isFunction, isItem, isValue, iterable, markTailCalls, 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 List(InputInfo ii, Expr... l)
ii
- input infol
- expression listMethod Detail |
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public void checkUp() throws QueryException
Expr
checkUp
in class Arr
QueryException
- query exceptionpublic Expr compile(QueryContext ctx, VarScope scp) throws QueryException
Expr
compile
in class Arr
ctx
- query contextscp
- variable scope
QueryException
- query exceptionpublic Expr optimize(QueryContext ctx, VarScope scp) throws QueryException
Expr
optimize
in class Expr
ctx
- query contextscp
- variable scope
QueryException
- query exceptionpublic Iter iter(QueryContext ctx)
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
public 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 boolean isVacuous()
Expr
isVacuous
in class Expr
public java.lang.String toString()
toString
in class ExprInfo
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