edu.wpi.cs.dsrg.xmldb.xat.common.operator
Class XATMultiSourceOperatorImp
java.lang.Object
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+--edu.wpi.cs.dsrg.xmldb.xat.common.operator.XATPropertiesImp
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+--edu.wpi.cs.dsrg.xmldb.xat.common.operator.XATQueryObjectImp
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+--edu.wpi.cs.dsrg.xmldb.xat.common.operator.XATOperatorImp
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+--edu.wpi.cs.dsrg.xmldb.xat.common.operator.XATMultiSourceOperatorImp
- Direct Known Subclasses:
- AllImp, CartesianProductImp, DifferenceImp, IfExprImp, IntersectionImp, MergeImp, OrImp, OuterUnionImp, UnionImp, XMLDifferenceImp, XMLIntersectionImp
- public abstract class XATMultiSourceOperatorImp
- extends XATOperatorImp
- implements XATMultiSourceOperator
Implementation for the Interface for XATMultiSourceOperator.
- Since:
- 1.0
- See Also:
- Serialized Form
Methods inherited from class edu.wpi.cs.dsrg.xmldb.xat.common.operator.XATOperatorImp |
clone,
getColumnsFiltered,
getNode,
getOutput,
getOutputColumnName,
getOutputDataSource,
getOutputDataSources,
getPrimaryDataSource,
getPrimarySource,
setDefaultProperties,
setNode,
setOutput,
setOutputColumnName,
toString |
Methods inherited from class java.lang.Object |
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
XATMultiSourceOperatorImp
public XATMultiSourceOperatorImp(XATNode init)
- Assigns a node to this opertor.
- Parameters:
init
- is an XAT node- Since:
- 1.0
getDataSourceAt
public XATDataSource getDataSourceAt(int position)
- Get a specific source of a certain number.
- Specified by:
- getDataSourceAt in interface XATMultiSourceOperator
- Returns:
- XATDataSource of that position.
- Since:
- 1.0
getDataSources
public XATDataSource[] getDataSources()
- Return an array of XATDataSource objects got from its child nodes.
You can get those XATDataSource objects from children nodes.
- Specified by:
- getDataSources in interface XATMultiSourceOperator
- Returns:
- Vector of XATDataSource.
- Since:
- 1.0
getSourceAt
public XATTable getSourceAt(int position)
- Deprecated. use XATMultiSourceOperator.getDataSourceAt(int position)
- Get a specific source of a certain number.
- Specified by:
- getSourceAt in interface XATMultiSourceOperator
- Returns:
- XATTable of that position.
- Since:
- 1.0
getSources
public XATTable[] getSources()
- Deprecated. use XATMultiSourceOperator.getDataSources(int position)
- Return a vector of XATTable objects got from its child nodes.
You can get those XATTable objects from children nodes.
- Specified by:
- getSources in interface XATMultiSourceOperator
- Returns:
- Vector of XATTable.
- Since:
- 1.0
setProperty
public void setProperty(java.lang.String name,
java.lang.String value)
throws java.lang.Exception
- sets the given property to the new value. This method is responsible
for validating the given property. An exception is thrown if
the value is not correct.
Validation should be done in the following manner:
First the method should check if the object supports the given property by calling
isValidPropertyName(String). If it is not a valid property name, then an exception should
be thrown.
Once it is known that the object supports the property, the value must be validated. Each implementor of
XATStatistics has a set of properties that are common to all of its types and some that are specific to types.
For example, all XATOperators (which implement XATStatistics) have certain properties while an individual XATOperator
has specific properties. The indivual types should only validate their own specific types. If the caller is trying
to set a common type, it should be validated by the super class by calling super.setProperty(name, value). This
will reduce duplicate code.
When it is determined the name / value pair is correct, the pair is updated using setNewPropertyValue()
XATStatisticsImp provides default validation by checking to see if the property's value is
>=0. propertyValues that are Strings will just be set. If the property requires more strict constraints than this,
it is up to the subclass that created the property to validate it (as described above).
- Overrides:
- setProperty in class XATOperatorImp
- Parameters:
name
- the name of the property to setvalue
- the new value of the property- Throws:
- java.lang.Exception - if the given property cannot be found or
if the value is not valid for the given property.
- Since:
- 1.0