org.eclipse.birt.data.engine.api
Interface IBaseDataSetDesign

All Known Subinterfaces:
IJointDataSetDesign, IOdaDataSetDesign, IScriptDataSetDesign
All Known Implementing Classes:
BaseDataSetDesign, JointDataSetDesign, OdaDataSetDesign, ScriptDataSetDesign

public interface IBaseDataSetDesign

Describes the static design of any data set to be used by the Data Engine. Each sub-interface defines a specific type of data set.


Method Summary
 java.lang.String getAfterCloseScript()
          Returns the afterClose script to be called just after the data set is closed.
 java.lang.String getAfterOpenScript()
          Returns the afterOpen script to be called just after the data set is opened, but before fetching each row.
 java.lang.String getBeforeCloseScript()
          Returns the beforeClose script to be called just before closing the data set.
 java.lang.String getBeforeOpenScript()
          Returns the beforeOpen script to be called just before opening the data set.
 int getCacheRowCount()
          When cache option is true, user needs to specify how many rows will be retrieved into cache for use.
 java.util.List getComputedColumns()
          Returns a list of computed columns.
 java.lang.String getDataSourceName()
          Returns the data source (connection) name for this data set.
 IBaseDataSetEventHandler getEventHandler()
          Returns the event handler for the data set
 java.util.List getFilters()
          Returns a list of filters.
 java.util.Collection getInputParamBindings()
          Returns the set of input parameter bindings as an unordered collection of IInputParameterBinding objects.
 java.lang.String getName()
          Gets the name of the data set.
 java.lang.String getOnFetchScript()
          Returns the onFetch script to be called just after the a row is read from the data set.
 java.util.List getParameters()
          Returns the data set parameter definitions as a list of IParameterDefinition objects.
 java.util.List getResultSetHints()
          Returns the primary result set hints as a list of IColumnDefinition objects.
 int getRowFetchLimit()
          Return the max number of rows that the data set represent by this IBaseDataSetDesign intance can fetch from data source.
 boolean needDistinctValue()
          When user wants to retrieve the distinct row, this flag needs to be set as true.
 void setRowFetchLimit(int max)
          Set up the max number of rows that the data set represent by this IBaseDataSetDesign instance can fetch from data source.
 

Method Detail

getName

public java.lang.String getName()
Gets the name of the data set.

Returns:
Name of data set.

getCacheRowCount

public int getCacheRowCount()
When cache option is true, user needs to specify how many rows will be retrieved into cache for use.

Returns:
cache row count

needDistinctValue

public boolean needDistinctValue()
When user wants to retrieve the distinct row, this flag needs to be set as true. The distinct row means there is no two rows which will have the same value on all columns.

Returns:
true, distinct row is required false, no distinct requirement on row

getDataSourceName

public java.lang.String getDataSourceName()
Returns the data source (connection) name for this data set.

Returns:
Name of the data source (connection) for this data set.

getComputedColumns

public java.util.List getComputedColumns()
Returns a list of computed columns. Contains IComputedColumn objects. Computed columns must be computed before applying filters.

Returns:
the computed columns. An empty list if none is defined.

getFilters

public java.util.List getFilters()
Returns a list of filters. The List contains IFilterDefinition objects. The data set should discard any row that does not satisfy all the filters.

Returns:
the filters. An empty list if none is defined.

getParameters

public java.util.List getParameters()
Returns the data set parameter definitions as a list of IParameterDefinition objects.

Returns:
the parameter definitions. An empty list if none is defined.

getResultSetHints

public java.util.List getResultSetHints()
Returns the primary result set hints as a list of IColumnDefinition objects.

Returns:
the result set hints as a list of IColumnDefinition objects. An empty list if none is defined, which normally means that the data set can provide the definition from the underlying data access provider.

getInputParamBindings

public java.util.Collection getInputParamBindings()
Returns the set of input parameter bindings as an unordered collection of IInputParameterBinding objects.

Returns:
the input parameter bindings. An empty collection if none is defined.

getBeforeOpenScript

public java.lang.String getBeforeOpenScript()
Returns the beforeOpen script to be called just before opening the data set.

Returns:
the beforeOpen script. Null if none is defined.

getAfterOpenScript

public java.lang.String getAfterOpenScript()
Returns the afterOpen script to be called just after the data set is opened, but before fetching each row.

Returns:
the afterOpen script. Null if none is defined.

getOnFetchScript

public java.lang.String getOnFetchScript()
Returns the onFetch script to be called just after the a row is read from the data set. Called after setting computed columns and only for rows that pass the filters. (Not called for rows that are filtered out of the data set.)

Returns:
the onFetch script. Null if none is defined.

getBeforeCloseScript

public java.lang.String getBeforeCloseScript()
Returns the beforeClose script to be called just before closing the data set.

Returns:
the beforeClose script. Null if none is defined.

getAfterCloseScript

public java.lang.String getAfterCloseScript()
Returns the afterClose script to be called just after the data set is closed.

Returns:
the afterClose script. Null if none is defined.

getEventHandler

public IBaseDataSetEventHandler getEventHandler()
Returns the event handler for the data set


setRowFetchLimit

public void setRowFetchLimit(int max)
Set up the max number of rows that the data set represent by this IBaseDataSetDesign instance can fetch from data source. If the input number is non-positive then unlimited number of rows will be fetched.

Parameters:
max -

getRowFetchLimit

public int getRowFetchLimit()
Return the max number of rows that the data set represent by this IBaseDataSetDesign intance can fetch from data source.

Returns:


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