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java.lang.Object | +--net.sf.saffron.util.EnumeratedValues.BasicValue | +--net.sf.saffron.opt.CallingConvention
CallingConvention
enumerates all calling conventions defined
by Saffron itself. This set can be extended by applications by defining
new instances of CallingConvention and registering them with a planner,
along with the desired conversion rules. Extended ordinals must be
greater than CallingConvention.enumeration.getMax().
Field Summary | |
static CallingConvention |
ARRAY
|
static int |
ARRAY_ORDINAL
The ARRAY calling convention results in a Java expression
which evaluates to an array containing the rows returned. |
static CallingConvention |
COLLECTION
|
static int |
COLLECTION_ORDINAL
The COLLECTION calling convention results in a Java
expression which evaluates to a Collection ,
typically a ArrayList . |
static EnumeratedValues |
enumeration
|
static CallingConvention |
ENUMERATION
|
static int |
ENUMERATION_ORDINAL
|
static CallingConvention |
EXISTS
|
static int |
EXISTS_ORDINAL
The EXISTS calling convention is only allowed for a
terminator. |
static CallingConvention |
HASHTABLE
|
static int |
HASHTABLE_ORDINAL
|
static CallingConvention |
ITERABLE
|
static int |
ITERABLE_ORDINAL
The ITERABLE calling convention means that the expression
is converted to an openjava expression (Expression ) which evalutes to an object which
implements Iterable . |
static CallingConvention |
ITERATOR
|
static int |
ITERATOR_ORDINAL
The ITERATOR calling convention means that the expression
is converted to an openjava expression (Expression ) which evalutes to an Iterator . |
static CallingConvention |
JAVA
|
static int |
JAVA_ORDINAL
The JAVA calling convention means that the expression is
converted into an Openjava parse tree, which can then be un-parsed,
compiled, and executed as java code. |
static CallingConvention |
MAP
|
static int |
MAP_ORDINAL
|
static CallingConvention |
NONE
|
static int |
NONE_ORDINAL
The NONE calling convention means that expression does not
support any calling convention -- in other words, it is not
implementable, and has to be transformed to something else in order to
be implemented. |
static CallingConvention |
RESULT_SET
|
static int |
RESULT_SET_ORDINAL
The RESULT_SET calling convention means that the
expression is a JDBC result set . |
static CallingConvention[] |
values
|
static CallingConvention |
VECTOR
|
static int |
VECTOR_ORDINAL
|
Fields inherited from class net.sf.saffron.util.EnumeratedValues.BasicValue |
description_, name_, ordinal_ |
Constructor Summary | |
CallingConvention(String name,
int ordinal)
|
Methods inherited from class net.sf.saffron.util.EnumeratedValues.BasicValue |
equals, getDescription, getName, getOrdinal, toString, unexpected |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
public static final int NONE_ORDINAL
NONE
calling convention means that expression does not
support any calling convention -- in other words, it is not
implementable, and has to be transformed to something else in order to
be implemented.
public static final CallingConvention NONE
public static final int JAVA_ORDINAL
JAVA
calling convention means that the expression is
converted into an Openjava parse tree, which can then be un-parsed,
compiled, and executed as java code.
The SaffronRel.implement(net.sf.saffron.opt.RelImplementor, int)
method generates a piece of code which
will call the piece of code corresponding to the parent once for each
row:
RelImplementor.generateParentBody(net.sf.saffron.rel.SaffronRel, openjava.ptree.StatementList)
, which in turn calls SaffronRel.implement(net.sf.saffron.opt.RelImplementor, int)
() on the parent.
RelImplementor.getStatementList()
).
public static final CallingConvention JAVA
public static final int ITERATOR_ORDINAL
ITERATOR
calling convention means that the expression
is converted to an openjava expression (Expression
) which evalutes to an Iterator
. See ConverterRel
.
public static final CallingConvention ITERATOR
public static final int ARRAY_ORDINAL
ARRAY
calling convention results in a Java expression
which evaluates to an array containing the rows returned. Compare
with JAVA_ORDINAL
, where a loop does something for
each row returned).
public static final CallingConvention ARRAY
public static final int COLLECTION_ORDINAL
COLLECTION
calling convention results in a Java
expression which evaluates to a Collection
,
typically a ArrayList
.
public static final CallingConvention COLLECTION
public static final int VECTOR_ORDINAL
public static final CallingConvention VECTOR
public static final int ENUMERATION_ORDINAL
public static final CallingConvention ENUMERATION
public static final int MAP_ORDINAL
public static final CallingConvention MAP
public static final int HASHTABLE_ORDINAL
public static final CallingConvention HASHTABLE
public static final int ITERABLE_ORDINAL
ITERABLE
calling convention means that the expression
is converted to an openjava expression (Expression
) which evalutes to an object which
implements Iterable
.
public static final CallingConvention ITERABLE
public static final int EXISTS_ORDINAL
EXISTS
calling convention is only allowed for a
terminator.
public static final CallingConvention EXISTS
public static final int RESULT_SET_ORDINAL
RESULT_SET
calling convention means that the
expression is a JDBC result set
. When a
result set is converted to another convention such as array or
iterator, the default object type is Row
.
public static final CallingConvention RESULT_SET
public static final CallingConvention[] values
public static final EnumeratedValues enumeration
Constructor Detail |
public CallingConvention(String name, int ordinal)
|
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