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java.lang.Objectedu.udo.cs.yale.operator.Operator
edu.udo.cs.yale.operator.io.ResultSetExampleSource
public abstract class ResultSetExampleSource
Abstract superclass for operators that provide access to an
ExampleSet
via a ResultSet
.
Field Summary | |
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private static java.lang.Class[] |
INPUT_CLASSES
|
private static java.lang.Class[] |
OUTPUT_CLASSES
|
Constructor Summary | |
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ResultSetExampleSource(OperatorDescription description)
|
Method Summary | |
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IOObject[] |
apply()
Implement this method in subclasses. |
protected ExampleSet |
createExampleSet(ExampleTable table)
|
private static Attribute |
find(java.util.List attributeList,
java.lang.String name)
|
java.lang.Class[] |
getInputClasses()
Returns the classes that are needed as input. |
java.lang.Class[] |
getOutputClasses()
Returns the classes that are guaranteed to be returned by apply() as additional output. |
java.util.List<ParameterType> |
getParameterTypes()
Returns a list of ParameterTypes describing the parameters of this operator. |
abstract java.sql.ResultSet |
getResultSet()
Returns a ResultSet . |
abstract void |
setNominalValues(java.util.List attributeList,
java.sql.ResultSet resultSet,
Attribute label)
Since the ResultSet does not provide information about possible
values of nominal attributes, subclasses must set these by implementing
this method. |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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private static final java.lang.Class[] INPUT_CLASSES
private static final java.lang.Class[] OUTPUT_CLASSES
Constructor Detail |
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public ResultSetExampleSource(OperatorDescription description)
Method Detail |
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public abstract java.sql.ResultSet getResultSet() throws OperatorException
ResultSet
.
OperatorException
public abstract void setNominalValues(java.util.List attributeList, java.sql.ResultSet resultSet, Attribute label) throws OperatorException
ResultSet
does not provide information about possible
values of nominal attributes, subclasses must set these by implementing
this method.
attributeList
- List of Attribute
OperatorException
public IOObject[] apply() throws OperatorException
Operator
apply
in class Operator
OperatorException
private static Attribute find(java.util.List attributeList, java.lang.String name) throws OperatorException
OperatorException
protected ExampleSet createExampleSet(ExampleTable table) throws OperatorException
OperatorException
public java.lang.Class[] getInputClasses()
Operator
Operator.getOutputClasses()
and
Operator.apply()
if this is necessary. This default behavior can be
changed by overriding Operator.getInputDescription(Class)
. Subclasses
which implement this method should not make use of parameters since this
method is invoked by getParameterTypes(). Therefore, parameters are not
fully available at this point of time and this might lead to exceptions.
Please use InputDescriptions instead.
getInputClasses
in class Operator
public java.lang.Class[] getOutputClasses()
Operator
Operator.getInputDescription(Class)
and can be changed by
overwriting this method. Objects which are not consumed must not be
defined as additional output in this method. May be null or an empy array
(no additional output is produced).
getOutputClasses
in class Operator
public java.util.List<ParameterType> getParameterTypes()
Operator
getParameterTypes
in class Operator
|
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