org.wso2.carbon.dataservices.core.description.query

Class ExpressionQuery

java.lang.Object

org.wso2.carbon.dataservices.core.engine.XMLWriterHelper

org.wso2.carbon.dataservices.core.description.query.Query

org.wso2.carbon.dataservices.core.description.query.ExpressionQuery

Direct Known Subclasses:

CassandraQuery, SQLQuery

public abstract class ExpressionQuery
extends Query

This class represents Generalized Query Expressions which are similar to SQL and CQL.

Constructor Summary

Constructors

Constructor and Description
ExpressionQuery(DataService dataService, String queryId, List<QueryParam> queryParams, String query, Result result, String configId, EventTrigger inputEventTrigger, EventTrigger outputEventTrigger, Map<String,String> advancedProperties, String inputNamespace)

Method Summary

Modifier and Type	Method and Description
protected String	createProcessedQuery(String query, InternalParamCollection params, int paramCount) Returns the Query manipulated to suite the given parameters, e.g.
int	getParamCount()
String	getQuery()
protected void	init(String query) Pre-processing of the query
protected boolean	isDynamicQuery(InternalParamCollection params) This method checks whether DataTypes.QUERY_STRING type parameters are available in the query input mappings and returns a boolean value.
protected Object[]	processDynamicQuery(String query, InternalParamCollection params) Modifies the Query to include the direct value of the parameters of type "QUERY_STRING"; The Query will be recreated and the other parameters will be re-organized to point to correct ordinal values.

Methods inherited from class org.wso2.carbon.dataservices.core.description.query.Query

addQueryPreprocessedObject, execute, getAdvancedProperties, getAndRemoveQueryPreprocessObject, getConfigId, getCurrentInternalParams, getDataService, getInputEventTrigger, getInputNamespace, getOutputEventTrigger, getQueryId, getQueryParams, getResult, hasResult, isPreBuildResult, isQueryPreprocessInitial, isQueryPreprocessSecondary, isUsingColumnNumbers, isWriteRow, resetCurrentInternalParams, resetQueryPreprocessing, runPostQuery, runPreQuery, setCurrentInternalParams, setQueryPreprocessingInitial, setQueryPreprocessingSecondary, writeResultEntry

Methods inherited from class org.wso2.carbon.dataservices.core.engine.XMLWriterHelper

addAttribute, endElement, getNamespace, setNamespace, startRowElement, startWrapperElement, writeResultElement

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ExpressionQuery

public ExpressionQuery(DataService dataService,
                       String queryId,
                       List<QueryParam> queryParams,
                       String query,
                       Result result,
                       String configId,
                       EventTrigger inputEventTrigger,
                       EventTrigger outputEventTrigger,
                       Map<String,String> advancedProperties,
                       String inputNamespace)

Method Detail

getQuery

public String getQuery()

getParamCount

public int getParamCount()

init

protected void init(String query)
             throws DataServiceFault

Pre-processing of the query

Parameters:

query - Query

Throws:

DataServiceFault

isDynamicQuery

protected boolean isDynamicQuery(InternalParamCollection params)

This method checks whether DataTypes.QUERY_STRING type parameters are available in the query input mappings and returns a boolean value.

Parameters:

params - The parameters in the input mappings

Returns:

The boolean value of the isDynamicQuery variable

createProcessedQuery

protected String createProcessedQuery(String query,
                                      InternalParamCollection params,
                                      int paramCount)

Returns the Query manipulated to suite the given parameters, e.g. adding additional "?"'s for array types.

processDynamicQuery

protected Object[] processDynamicQuery(String query,
                                       InternalParamCollection params)

Modifies the Query to include the direct value of the parameters of type "QUERY_STRING"; The Query will be recreated and the other parameters will be re-organized to point to correct ordinal values.

Returns:

[0] The updated Query, [1] The updated parameter count