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java.lang.Objectorg.basex.data.ExprInfo
org.basex.query.expr.Expr
org.basex.query.expr.ParseExpr
org.basex.query.expr.Simple
org.basex.query.expr.Root
public final class Root
Root node.
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.ParseExpr |
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info, size, type |
Constructor Summary | |
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Root(InputInfo ii)
Constructor. |
Method Summary | |
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boolean |
accept(ASTVisitor visitor)
Traverses this expression, notifying the visitor of declared and used variables, and checking the tree for other recursive properties. |
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 |
has(Expr.Flag flag)
Indicates if an expression has the specified compiler property. |
Iter |
iter(QueryContext ctx)
Evaluates the expression and returns an iterator on the resulting items. |
boolean |
iterable()
Returns true if the expression is iterable, i.e., if it will not contain any duplicate nodes and if all nodes will be are sorted. |
static ANode |
root(Value v)
Returns the root node of the specified item. |
boolean |
sameAs(Expr cmp)
Compares the current and specified expression for equality. |
java.lang.String |
toString()
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Methods inherited from class org.basex.query.expr.Simple |
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checkUp, count, exprSize, inline, plan, 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, value |
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, markTailCalls, optimize, 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 Root(InputInfo ii)
ii
- input infoMethod Detail |
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public Expr compile(QueryContext ctx, VarScope scp)
Expr
compile
in class Simple
ctx
- query contextscp
- variable scope
public Iter 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 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 static ANode root(Value v)
v
- input node
public boolean has(Expr.Flag flag)
Expr
Expr.compile(org.basex.query.QueryContext, org.basex.query.var.VarScope)
methods to test properties of sub-expressions.
It returns true
if at least one test is successful.
has
in class Simple
flag
- flag to be found
public boolean accept(ASTVisitor visitor)
Expr
accept
in class Simple
visitor
- visitor
public boolean iterable()
Expr
AxisPath
.
iterable
in class Expr
public boolean sameAs(Expr cmp)
Expr
sameAs
in class Expr
cmp
- expression to be compared
public java.lang.String toString()
toString
in class ExprInfo
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