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java.lang.Objectorg.basex.query.ExprInfo
org.basex.query.xquery.expr.Expr
org.basex.query.xquery.item.Item
public abstract class Item
Abstract item.
Nested Class Summary |
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Nested classes/interfaces inherited from class org.basex.query.xquery.expr.Expr |
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Expr.Return, Expr.Using |
Field Summary | |
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Type |
type
Data type. |
Method Summary | |
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boolean |
bool()
Returns a boolean representation of the item. |
void |
castErr(java.lang.Object val)
Throws a cast error. |
Expr |
comp(XQContext ctx)
Optimizes and compiles the expression. |
boolean |
d()
Checks if this is a duration. |
double |
dbl()
Returns a double representation of the item. |
java.math.BigDecimal |
dec()
Returns a decimal representation of the item. |
int |
diff(Item it)
Returns the difference between the current and the specified item. |
abstract boolean |
eq(Item it)
Checks the items for equality. |
float |
flt()
Returns a float representation of the item. |
int |
hash()
Returns a hash code. |
boolean |
i()
Checks if this is an item. |
Iter |
iter()
Returns an item iterator. |
Iter |
iter(XQContext ctx)
Evaluates the expression and returns an iterator on the resulting items. |
long |
itr()
Returns an integer (long) representation of the item. |
java.lang.Object |
java()
Returns a Java object. |
boolean |
n()
Checks if this is a numeric item. |
byte[] |
name()
Returns the simplified class name (for debugging). |
boolean |
node()
Checks if this is a node. |
void |
plan(Serializer ser)
Recursively sends the abstract syntax of this expression to the specified serializer. |
Type |
returned()
Indicates if an expression returns the specified type. |
boolean |
s()
Checks if this is a string item. |
double |
score()
Returns a score value. |
void |
score(double s)
Sets a new score value. |
void |
serialize(Serializer ser)
Serializes the item. |
int |
size()
Returns the sequence size or 1. |
byte[] |
str()
Returns an atomized string. |
java.lang.String |
toString()
|
boolean |
u()
Checks if this is an untyped item. |
boolean |
uses(Expr.Using u)
Indicates if an expression uses the specified type. |
Methods inherited from class org.basex.query.xquery.expr.Expr |
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e |
Methods inherited from class org.basex.query.ExprInfo |
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color, info |
Methods inherited from class java.lang.Object |
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equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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public Type type
Method Detail |
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public Expr comp(XQContext ctx)
Expr
comp
in class Expr
ctx
- query context
public boolean i()
Expr
i
in class Expr
public final boolean n()
public final boolean u()
public final boolean s()
public final boolean d()
public final boolean node()
public int size()
public byte[] str()
public int hash()
public java.lang.Object java()
public boolean bool() throws XQException
XQException
- evaluation exceptionpublic java.math.BigDecimal dec() throws XQException
XQException
- evaluation exceptionpublic long itr() throws XQException
XQException
- evaluation exceptionpublic float flt() throws XQException
XQException
- evaluation exceptionpublic double dbl() throws XQException
XQException
- evaluation exceptionpublic Iter iter(XQContext ctx)
Expr
iter
in class Expr
ctx
- query context
public Iter iter()
public abstract boolean eq(Item it) throws XQException
it
- item to be compared.
XQException
- evaluation exceptionpublic int diff(Item it) throws XQException
it
- item to be compared.
XQException
- evaluation exceptionpublic double score()
public void score(double s)
s
- score valuepublic final void castErr(java.lang.Object val) throws XQException
val
- cast value
XQException
- evaluation exceptionpublic void serialize(Serializer ser) throws java.io.IOException
ser
- serializer
java.io.IOException
- exceptionpublic boolean uses(Expr.Using u)
Expr
uses
in class Expr
u
- using flag
public Type returned()
Expr
returned
in class Expr
public final byte[] name()
ExprInfo
name
in class ExprInfo
public void plan(Serializer ser) throws java.io.IOException
ExprInfo
plan
in class ExprInfo
ser
- serializer
java.io.IOException
- exceptionpublic java.lang.String toString()
toString
in class ExprInfo
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