Module org.eclipse.persistence.core

Package org.eclipse.persistence.queries

Class DirectReadQuery

java.lang.Object

org.eclipse.persistence.queries.DatabaseQuery

org.eclipse.persistence.queries.ReadQuery

org.eclipse.persistence.queries.DataReadQuery

org.eclipse.persistence.queries.DirectReadQuery

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ValueReadQuery

public class DirectReadQuery
extends DataReadQuery

Purpose: Concrete class to perform a direct read.

Responsibilities: Used in conjunction with DirectCollectionMapping. This can be used to read a single column of data (i.e. one field). A container (implementing Collection) of the data values is returned.

Since:

TOPLink/Java 1.0

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.persistence.queries.DatabaseQuery

DatabaseQuery.ParameterType

Field Summary

Fields

Modifier and Type	Field	Description
protected Converter	valueConverter	Allows user defined conversion between the result value and the database value.

Fields inherited from class org.eclipse.persistence.queries.DataReadQuery

ARRAY, ATTRIBUTE, AUTO, containerPolicy, MAP, resultType, VALUE

Fields inherited from class org.eclipse.persistence.queries.ReadQuery

allowQueryResultsCacheValidation, fetchSize, firstResult, maxResults, maxRows, queryId, queryResultCachingPolicy, temporaryCachedQueryResults

Fields inherited from class org.eclipse.persistence.queries.DatabaseQuery

accessors, allowNativeSQLQuery, argumentFields, argumentParameterTypes, arguments, argumentTypeNames, argumentTypes, argumentValues, BATCH_FETCH_PROPERTY, CascadeAggregateDelete, CascadeAllParts, CascadeByMapping, CascadeDependentParts, cascadePolicy, CascadePrivateParts, descriptor, descriptors, doNotRedirect, executionSession, flushOnExecute, hintString, isCustomQueryUsed, isExecutionClone, isNativeConnectionRequired, isPrepared, isUserDefined, isUserDefinedSQLCall, monitorName, name, NoCascading, nullableArguments, parameterDelimiter, partitioningPolicy, properties, queryMechanism, queryTimeout, queryTimeoutUnit, redirector, session, sessionName, shouldBindAllParameters, shouldCacheStatement, shouldCloneCall, shouldMaintainCache, shouldPrepare, shouldRetrieveBypassCache, shouldReturnGeneratedKeys, shouldStoreBypassCache, shouldUseWrapperPolicy, shouldValidateUpdateCallCacheUse, sourceMapping, translationRow

Constructor Summary

Constructors

Constructor	Description
DirectReadQuery()	PUBLIC: Initialize the state of the query.
DirectReadQuery(String sqlString)	PUBLIC: Initialize the query to use the specified SQL string.
DirectReadQuery(Call call)	PUBLIC: Initialize the query to use the specified call.

Method Summary

Modifier and Type	Method	Description
Converter	getValueConverter()	PUBLIC: Return the converter on the query.
boolean	isDirectReadQuery()	PUBLIC: Return if this is a direct read query.
void	setValueConverter(Converter valueConverter)	PUBLIC: Set the converter on the query.

Methods inherited from class org.eclipse.persistence.queries.DataReadQuery

buildObject, cacheResult, clone, execute, executeDatabaseQuery, executeNonCursor, getContainerPolicy, getResultType, isDataReadQuery, prepare, prepareForExecution, remoteExecute, setContainerPolicy, setResultType, setResultType, useCollectionClass, useCursoredStream, useCursoredStream, useCursoredStream, useScrollableCursor, useScrollableCursor, useScrollableCursor

Methods inherited from class org.eclipse.persistence.queries.ReadQuery

cacheQueryResults, clearQueryResults, clonedQueryExecutionComplete, copyFromQuery, doNotCacheQueryResults, getFetchSize, getFirstResult, getInternalMax, getMaxRows, getQueryId, getQueryResults, getQueryResults, getQueryResults, getQueryResultsCachePolicy, getTemporaryCachedQueryResults, isDefaultPropertiesQuery, isReadQuery, remoteExecute, setAllowQueryResultsCacheValidation, setFetchSize, setFirstResult, setInternalMax, setMaxRows, setQueryId, setQueryResults, setQueryResultsCachePolicy, setTemporaryCachedQueryResults, shouldAllowQueryResultsCacheValidation, shouldCacheQueryResults

Methods inherited from class org.eclipse.persistence.queries.DatabaseQuery

addArgument, addArgument, addArgument, addArgument, addArgument, addArgument, addArgumentByTypeName, addArgumentValue, addArgumentValues, addCall, addStatement, bindAllParameters, buildArgumentFields, buildSelectionCriteria, cacheStatement, cascadeAllParts, cascadeByMapping, cascadeOnlyDependentParts, cascadePrivateParts, checkDescriptor, checkEarlyReturn, checkForCustomQuery, checkPrepare, checkPrepare, convertClassNamesToClasses, dontBindAllParameters, dontCacheStatement, dontCascadeParts, dontMaintainCache, executeInUnitOfWork, extractRemoteResult, getAccessor, getAccessors, getArgumentParameterTypes, getArguments, getArgumentTypeNames, getArgumentTypes, getArgumentValues, getBatchObjects, getCall, getCascadePolicy, getDatasourceCall, getDatasourceCalls, getDefaultRedirector, getDescriptor, getDescriptors, getDomainClassNounName, getDoNotRedirect, getEJBQLString, getExecutionSession, getFlushOnExecute, getHintString, getJPQLString, getMonitorName, getName, getNullableArguments, getParameterDelimiter, getParameterDelimiterChar, getPartitioningPolicy, getProperties, getProperty, getQueryMechanism, getQueryNounName, getQueryTimeout, getQueryTimeoutUnit, getRedirector, getRedirectorForQuery, getReferenceClass, getReferenceClassName, getSelectionCriteria, getSensorName, getSession, getSessionName, getShouldBindAllParameters, getSourceMapping, getSQLStatement, getSQLString, getSQLStrings, getTranslatedSQLString, getTranslatedSQLStrings, getTranslationRow, hasAccessor, hasArguments, hasNullableArguments, hasProperties, hasQueryMechanism, hasSessionName, ignoreBindAllParameters, ignoreCacheStatement, isCallQuery, isCascadeOfAggregateDelete, isCustomQueryUsed, isCustomSelectionQuery, isDataModifyQuery, isDeleteAllQuery, isDeleteObjectQuery, isExecutionClone, isExpressionQuery, isInsertObjectQuery, isJPQLCallQuery, isModifyAllQuery, isModifyQuery, isNativeConnectionRequired, isObjectBuildingQuery, isObjectLevelModifyQuery, isObjectLevelReadQuery, isPrepared, isReadAllQuery, isReadObjectQuery, isReportQuery, isResultSetMappingQuery, isSQLCallQuery, isUpdateAllQuery, isUpdateObjectQuery, isUserDefined, isUserDefinedSQLCall, isValueReadQuery, isWriteObjectQuery, maintainCache, prepareCall, prepareCustomQuery, prepareForRemoteExecution, prepareFromQuery, prepareInternal, redirectQuery, removeProperty, replaceValueHoldersIn, resetMonitorName, retrieveBypassCache, rowFromArguments, setAccessor, setAccessors, setAllowNativeSQLQuery, setArguments, setArgumentTypeNames, setArgumentTypes, setArgumentValues, setBatchObjects, setCall, setCascadePolicy, setDatasourceCall, setDescriptor, setDoNotRedirect, setEJBQLString, setExecutionSession, setFlushOnExecute, setHintString, setIsCustomQueryUsed, setIsExecutionClone, setIsNativeConnectionRequired, setIsPrepared, setIsUserDefined, setIsUserDefinedSQLCall, setJPQLString, setName, setNullableArguments, setParameterDelimiter, setPartitioningPolicy, setProperties, setProperty, setQueryMechanism, setQueryTimeout, setQueryTimeoutUnit, setRedirector, setSelectionCriteria, setSession, setSessionName, setShouldBindAllParameters, setShouldBindAllParameters, setShouldCacheStatement, setShouldMaintainCache, setShouldPrepare, setShouldRetrieveBypassCache, setShouldReturnGeneratedKeys, setShouldStoreBypassCache, setShouldUseWrapperPolicy, setShouldValidateUpdateCallCacheUse, setSourceMapping, setSQLStatement, setSQLString, setTranslationRow, shouldAllowNativeSQLQuery, shouldBindAllParameters, shouldCacheStatement, shouldCascadeAllParts, shouldCascadeByMapping, shouldCascadeOnlyDependentParts, shouldCascadeParts, shouldCascadePrivateParts, shouldCloneCall, shouldIgnoreBindAllParameters, shouldIgnoreCacheStatement, shouldMaintainCache, shouldPrepare, shouldPrepare, shouldRetrieveBypassCache, shouldReturnGeneratedKeys, shouldStoreBypassCache, shouldUseWrapperPolicy, shouldValidateUpdateCallCacheUse, storeBypassCache, toString

Methods inherited from class java.lang.Object

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

Field Details

valueConverter

protected Converter valueConverter

Allows user defined conversion between the result value and the database value.

Constructor Details

DirectReadQuery

public DirectReadQuery()

PUBLIC: Initialize the state of the query.

DirectReadQuery

public DirectReadQuery(String sqlString)

PUBLIC: Initialize the query to use the specified SQL string. Warning: Allowing an unverified SQL string to be passed into this method makes your application vulnerable to SQL injection attacks.

DirectReadQuery

public DirectReadQuery(Call call)

PUBLIC: Initialize the query to use the specified call.

Method Details

getValueConverter

public Converter getValueConverter()

PUBLIC: Return the converter on the query. A converter can be used to convert between the result value and database value.

Overrides:

getValueConverter in class DataReadQuery

setValueConverter

public void setValueConverter(Converter valueConverter)

PUBLIC: Set the converter on the query. A converter can be used to convert between the result value and database value.

isDirectReadQuery

public boolean isDirectReadQuery()

PUBLIC: Return if this is a direct read query.

Overrides:

isDirectReadQuery in class DatabaseQuery