Scala Library Documentation
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scala/dbc/Database.scala
]
case
class
Database(val
dbms : Vendor)
extends
ProductDatabase
abstract class must
be specialised for every different DBMS.Method Summary | |
def
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close
: Unit
..
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override def
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equals
(arg0 : Any) : Boolean
This method is used to compare the receiver object (
this )
with the argument object (arg0 ) for equivalence. |
def
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executeStatement
(statusStatement : Status) : Status[Unit]
Executes a statement that updates the state of the database.
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def
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executeStatement
(relationStatement : Relation) : Relation
Executes a statement that returns a relation on this database.
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def
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executeStatement
(relationStatement : Relation, debug : Boolean) : Relation
Executes a statement that returns a relation on this database.
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def
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executeStatement
[ResultType](transactionStatement : Transaction[ResultType]) : Status[ResultType]
Executes a list of statements or other operations inside a transaction.
Only statements are protected in a transaction, other Scala code is not.
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def
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executeStatement
(statusStatement : Status, debug : Boolean) : Status[Unit]
Executes a statement that updates the state of the database.
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def
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executeStatement
[ResultType](transactionStatement : Transaction[ResultType], debug : Boolean) : Status[ResultType]
Executes a list of statements or other operations inside a transaction.
Only statements are protected in a transaction, other Scala code is not.
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override def
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hashCode
: Int
Returns a hash code value for the object.
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override def
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productArity
: Int
return k for a product
A(x_1,...,x_k) |
override def
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productElement
(arg0 : Int) : Any
for a product
A(x_1,...,x_k) , returns x_(n+1)
for 0 <= n < k |
override def
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productPrefix
: java.lang.String
By default the empty string. Implementations may override this
method in order to prepend a string prefix to the result of the
toString methods.
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override def
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toString
: java.lang.String
Returns a string representation of the object.
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Methods inherited from AnyRef | |
getClass, clone, notify, notifyAll, wait, wait, wait, finalize, ==, !=, eq, ne, synchronized |
Methods inherited from Any | |
==, !=, isInstanceOf, asInstanceOf |
Class Summary | |
class
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Closed
extends java.lang.Exception with AnyRef
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Method Details |
def
close : Unit
relationStatement -
The statement to execute.relationStatement -
The statement to execute.debug -
Whether debugging information should be printed on the console.statusStatement -
The statement to execute.statusStatement -
The statement to execute.debug -
Whether debugging information should be printed on the console.
def
executeStatement[ResultType](transactionStatement : Transaction[ResultType]) : Status[ResultType]
transactionStatement -
The transaction to execute as a closure.
def
executeStatement[ResultType](transactionStatement : Transaction[ResultType], debug : Boolean) : Status[ResultType]
transactionStatement -
The transaction to execute as a closure.debug -
Whether debugging information should be printed on the console.override
def
hashCode : Int
The default hashing algorithm is platform dependent.
Note that it is allowed for two objects to have identical hash
codes (o1.hashCode.equals(o2.hashCode)
) yet not be
equal (o1.equals(o2)
returns false
). A
degenerate implementation could always return 0
.
However, it is required that if two objects are equal
(o1.equals(o2)
returns true
) that they
have identical hash codes
(o1.hashCode.equals(o2.hashCode)
). Therefore, when
overriding this method, be sure to verify that the behavior is
consistent with the equals
method.
override
def
toString : java.lang.String
The default representation is platform dependent.
this
)
with the argument object (arg0
) for equivalence.
The default implementations of this method is an equivalence relation:
x
of type Any
,
x.equals(x)
should return true
.x
and y
of type
Any
, x.equals(y)
should return true
if and only
if y.equals(x)
returns true
.x
, y
, and z
of type AnyRef
if x.equals(y)
returns true
and
y.equals(z)
returns
true
, then x.equals(z)
should return true
.
If you override this method, you should verify that
your implementation remains an equivalence relation.
Additionally, when overriding this method it is often necessary to
override hashCode
to ensure that objects that are
"equal" (o1.equals(o2)
returns true
)
hash to the same Int
(o1.hashCode.equals(o2.hashCode)
).
arg0 -
the object to compare against this object for equality.true
if the receiver object is equivalent to the argument; false
otherwise. override
def
productPrefix : java.lang.String
override
def
productArity : Int
A(x_1,...,x_k)
A(x_1,...,x_k)
, returns x_(n+1)
for 0 <= n < k
n -
the index of the element to returnIndexOutOfBoundsException -
n
elements after the first element
Scala Library Documentation
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