org.eclipse.persistence.queries

Class ReadAllQuery

java.lang.Object

org.eclipse.persistence.queries.DatabaseQuery

org.eclipse.persistence.queries.ReadQuery

org.eclipse.persistence.queries.ObjectBuildingQuery

org.eclipse.persistence.queries.ObjectLevelReadQuery

org.eclipse.persistence.queries.ReadAllQuery

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

ReportQuery

public class ReadAllQuery
extends ObjectLevelReadQuery

Purpose: Concrete class for all read queries involving a collection of objects.

Responsibilities: Return a container of the objects generated by the query. Implements the inheritance feature when dealing with abstract descriptors

Since:

TOPLink/Java 1.0

Author:

Yvon Lavoie

See Also:

Serialized Form

Nested Class Summary

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

DatabaseQuery.ParameterType

Field Summary

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

CheckCacheByExactPrimaryKey, CheckCacheByPrimaryKey, CheckCacheOnly, CheckCacheThenDatabase, ConformResultsInUnitOfWork, DoNotCheckCache, DONT_USE_DISTINCT, isResultSetAccessOptimizedQueryDefault, NONE, OPTIMISTIC, OPTIMISTIC_FORCE_INCREMENT, PESSIMISTIC_, PESSIMISTIC_FORCE_INCREMENT, PESSIMISTIC_READ, PESSIMISTIC_WRITE, READ, shouldUseSerializedObjectPolicyDefault, UNCOMPUTED_DISTINCT, USE_DISTINCT, UseDescriptorSetting, WRITE

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

DEFAULT_LOCK_MODE, LOCK, LOCK_NOWAIT, LOCK_RESULT_PROPERTY, NO_LOCK

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

BATCH_FETCH_PROPERTY, CascadeAggregateDelete, CascadeAllParts, CascadeByMapping, CascadeDependentParts, CascadePrivateParts, NoCascading

Constructor Summary

Constructors

Constructor and Description
ReadAllQuery() PUBLIC: Return a new read all query.
ReadAllQuery(Call call) PUBLIC: Create a read all query with the database call.
ReadAllQuery(java.lang.Class classToRead) PUBLIC: Return a new read all query.
ReadAllQuery(java.lang.Class classToRead, Call call) PUBLIC: Return a new read all query.
ReadAllQuery(java.lang.Class classToRead, Expression selectionCriteria) PUBLIC: Return a new read all query for the class and the selection criteria.
ReadAllQuery(java.lang.Class classToRead, ExpressionBuilder builder) PUBLIC: Return a new read all query for the class.
ReadAllQuery(ExpressionBuilder builder) PUBLIC: The expression builder should be provide on creation to ensure only one is used.
ReadAllQuery(java.lang.Object exampleObject, QueryByExamplePolicy policy) PUBLIC: Return a query by example query to find all objects matching the attributes of the example object.

Method Summary

Methods

Modifier and Type	Method and Description
void	addAscendingOrdering(java.lang.String queryKeyName) PUBLIC: Order the query results by the object's attribute or query key name.
void	cacheResult(java.lang.Object unwrappedOriginal) INTERNAL: This method is called by the object builder when building an original.
java.lang.Object	clone() INTERNAL: Clone the query.
boolean	equals(java.lang.Object object) INTERNAL: Return if the query is equal to the other.
java.lang.Object	execute(org.eclipse.persistence.internal.sessions.AbstractSession session, org.eclipse.persistence.internal.sessions.AbstractRecord row) INTERNAL: Execute the query.
java.lang.Object	extractRemoteResult(org.eclipse.persistence.internal.sessions.remote.Transporter transporter) INTERNAL: Extract the correct query result from the transporter.
Expression	getConnectByExpression() PUBLIC:
org.eclipse.persistence.internal.queries.ContainerPolicy	getContainerPolicy() INTERNAL: Return the query's container policy.
java.util.List<Expression>	getOrderSiblingsByExpressions() PUBLIC:
Expression	getStartWithExpression() PUBLIC:
boolean	hasHierarchicalExpressions() INTERNAL: Verify that we have hierarchical query expressions
boolean	isDefaultPropertiesQuery() INTERNAL: Return true if the query uses default properties.
boolean	isReadAllQuery() PUBLIC: Return if this is a read all query.
void	prepareForExecution() INTERNAL: Prepare the receiver for execution in a session.
void	prepareFromQuery(DatabaseQuery query) INTERNAL: Prepare the query from the prepared query.
java.lang.Object	registerResultInUnitOfWork(java.lang.Object result, org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork, org.eclipse.persistence.internal.sessions.AbstractRecord arguments, boolean buildDirectlyFromRows) INTERNAL: All objects queried via a UnitOfWork get registered here.
java.lang.Object	registerResultSetInUnitOfWork(java.sql.ResultSet resultSet, java.util.Vector fields, org.eclipse.persistence.internal.helper.DatabaseField[] fieldsArray, org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork, org.eclipse.persistence.internal.sessions.AbstractRecord arguments) INTERNAL: Version of the previous method for ResultSet optimization.
java.lang.Object	remoteExecute() INTERNAL: Execute the query through remote session.
java.util.Map	replaceValueHoldersIn(java.lang.Object object, org.eclipse.persistence.internal.sessions.remote.RemoteSessionController controller) INTERNAL: replace the value holders in the specified result object(s)
void	setContainerPolicy(org.eclipse.persistence.internal.queries.ContainerPolicy containerPolicy) PUBLIC: Set the container policy.
void	setHierarchicalQueryClause(Expression startWith, Expression connectBy, java.util.List<Expression> orderSiblingsExpressions) PUBLIC: Set the Hierarchical Query Clause for the query Example: Expression startWith = builder.get("id").equal(new Integer(100)); //can be any expression which identifies a set of employees Expression connectBy = builder.get("managedEmployees"); //indicated the relationship that the hierarchy is based on, must be self-referential Vector orderBy = new Vector(); orderBy.addElement(builder.get("startDate")); readAllQuery.setHierarchicalQueryClause(startWith, connectBy, orderBy); This query would generate SQL like this: SELECT * FROM EMPLOYEE START WITH ID=100 CONNECT BY PRIOR ID = MANAGER_ID ORDER SIBLINGS BY START_DATE
boolean	supportsResultSetAccessOptimizationOnExecute() INTERNAL: Indicates whether the query can use ResultSet optimization.
boolean	supportsResultSetAccessOptimizationOnPrepare() INTERNAL: Indicates whether the query can use ResultSet optimization.
void	useCollectionClass(java.lang.Class concreteClass) PUBLIC: Configure the mapping to use an instance of the specified container class to hold the target objects.
void	useCursoredStream() PUBLIC: Use a CursoredStream as the result collection.
void	useCursoredStream(int initialReadSize, int pageSize) PUBLIC: Use a CursoredStream as the result collection.
void	useCursoredStream(int initialReadSize, int pageSize, ValueReadQuery sizeQuery) PUBLIC: Use a CursoredStream as the result collection.
void	useMapClass(java.lang.Class concreteClass, java.lang.String methodName) PUBLIC: Configure the query to use an instance of the specified container class to hold the result objects.
void	useScrollableCursor() PUBLIC: Use a ScrollableCursor as the result collection.
void	useScrollableCursor(int pageSize) PUBLIC: Use a ScrollableCursor as the result collection.
void	useScrollableCursor(ScrollableCursorPolicy policy) PUBLIC: Use a ScrollableCursor as the result collection.

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

acquireLocks, acquireLocksWithoutWaiting, addAdditionalField, addAdditionalField, addBatchReadAttribute, addBatchReadAttribute, addDescendingOrdering, addJoinedAttribute, addJoinedAttribute, addJoinSelectionFields, addNonFetchJoin, addNonFetchJoinedAttribute, addNonFetchJoinedAttribute, addOrdering, addPartialAttribute, addPartialAttribute, addUnionExpression, buildObject, changeDescriptor, checkCacheOnly, checkDescriptor, checkEarlyReturn, checkPrepare, checkPrePrepare, clearIsResultSetOptimizedQuery, clearUsesResultSetAccessOptimization, computeBatchReadMappingQueries, conformResultsInUnitOfWork, copyFromQuery, deepClone, dontAcquireLocks, dontCheckCache, dontRefreshIdentityMapResult, dontRefreshRemoteIdentityMapResult, dontUseDistinct, except, executeDatabaseQuery, executeInUnitOfWork, extendPessimisticLockScope, getAdditionalFields, getAsOfClause, getBatchFetchPolicy, getBatchObjects, getBatchReadAttributeExpressions, getCacheUsage, getConcreteSubclassCalls, getConcreteSubclassJoinedMappingIndexes, getDistinctState, getExampleObject, getExecutionFetchGroup, getExecutionFetchGroup, getExpressionBuilder, getFetchGroup, getFetchGroupName, getFetchGroupNonNestedFieldsSet, getFetchGroupNonNestedFieldsSet, getFetchGroupSelectionFields, getInMemoryQueryIndirectionPolicy, getInMemoryQueryIndirectionPolicyState, getJoinedAttributeExpressions, getJoinedAttributeManager, getLoadGroup, getLockingClause, getLockModeType, getNonFetchJoinAttributeExpressions, getOrderByExpressions, getPartialAttributeExpressions, getPartialAttributeSelectionFields, getQueryByExamplePolicy, getReferenceClass, getReferenceClassName, getSelectionFields, getUnionExpressions, getWaitTimeout, hasAdditionalFields, hasAsOfClause, hasBatchReadAttributes, hasDefaultBuilder, hasExecutionFetchGroup, hasFetchGroup, hashCode, hasJoining, hasNonFetchJoinedAttributeExpressions, hasOrderByExpressions, hasPartialAttributeExpressions, hasUnionExpressions, intersect, isAttributeBatchRead, isCachedExpressionQuery, isClonePessimisticLocked, isDefaultLock, isDistinctComputed, isLockQuery, isLockQuery, isObjectLevelReadQuery, isPartialAttribute, isPrimaryKeyQuery, isReadOnly, isResultSetAccessOptimizedQuery, isResultSetOptimizedQuery, prepareFetchGroup, prepareOutsideUnitOfWork, recordCloneForPessimisticLocking, refreshIdentityMapResult, refreshRemoteIdentityMapResult, resetDistinct, setAdditionalFields, setAsOfClause, setBatchFetchPolicy, setBatchFetchSize, setBatchFetchType, setBatchObjects, setBatchReadAttributeExpressions, setCacheUsage, setDescriptor, setDistinctState, setEJBQLString, setExampleObject, setExpressionBuilder, setFetchGroup, setFetchGroupName, setInMemoryQueryIndirectionPolicy, setInMemoryQueryIndirectionPolicyState, setIsPrepared, setIsPrePrepared, setIsReadOnly, setIsResultSetAccessOptimizedQuery, setIsResultSetOptimizedQuery, setJoinedAttributeExpressions, setJoinedAttributeManager, setLoadGroup, setLockingClause, setLockMode, setLockModeType, setNonFetchJoinAttributeExpressions, setOrderByExpressions, setPartialAttributeExpressions, setQueryByExamplePolicy, setReferenceClass, setReferenceClassName, setSelectionCriteria, setShouldExtendPessimisticLockScope, setShouldFilterDuplicates, setShouldIncludeData, setShouldOuterJoinSubclasses, setShouldUseDefaultFetchGroup, setShouldUseSerializedObjectPolicy, setUnionExpressions, setWaitTimeout, shouldCheckCache, shouldCheckCacheOnly, shouldCheckDescriptorForCacheUsage, shouldConformResultsInUnitOfWork, shouldDistinctBeUsed, shouldExtendPessimisticLockScope, shouldFilterDuplicates, shouldIncludeData, shouldOuterJoinSubclasses, shouldReadAllMappings, shouldReadMapping, shouldUseDefaultFetchGroup, shouldUseSerializedObjectPolicy, toString, union, useDistinct, usesResultSetAccessOptimization

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

convertClassNamesToClasses, getDataResults, getExecutionTime, getLockMode, getPrefetchedCacheKeys, isAttributeJoined, isCacheCheckComplete, isObjectBuildingQuery, isRegisteringResults, postRegisterIndividualResult, registerIndividualResult, requiresDeferredLocks, setExecutionTime, setPrefetchedCacheKeys, setRequiresDeferredLocks, setShouldBuildNullForNullPk, setShouldRefreshIdentityMapResult, setShouldRefreshRemoteIdentityMapResult, setShouldRegisterResultsInUnitOfWork, setShouldUseExclusiveConnection, shouldBuildNullForNullPk, shouldRefreshIdentityMapResult, shouldRefreshRemoteIdentityMapResult, shouldRegisterResultsInUnitOfWork, shouldUseExclusiveConnection

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

cacheQueryResults, clearQueryResults, doNotCacheQueryResults, getFetchSize, getFirstResult, getInternalMax, getMaxRows, getQueryId, getQueryResultsCachePolicy, getTemporaryCachedQueryResults, isReadQuery, remoteExecute, setFetchSize, setFirstResult, setInternalMax, setMaxRows, setQueryId, setQueryResultsCachePolicy, setTemporaryCachedQueryResults, shouldCacheQueryResults

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

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

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ReadAllQuery

public ReadAllQuery()

PUBLIC: Return a new read all query. A reference class must be specified before execution. It is better to provide the class and expression builder on construction to ensure a single expression builder is used. If no selection criteria is specified this will read all objects of the class from the database.

ReadAllQuery

public ReadAllQuery(java.lang.Class classToRead)

PUBLIC: Return a new read all query. It is better to provide the class and expression builder on construction to ensure a single expression builder is used. If no selection criteria is specified this will read all objects of the class from the database.

ReadAllQuery

public ReadAllQuery(java.lang.Class classToRead,
            Expression selectionCriteria)

PUBLIC: Return a new read all query for the class and the selection criteria.

ReadAllQuery

public ReadAllQuery(java.lang.Class classToRead,
            ExpressionBuilder builder)

PUBLIC: Return a new read all query for the class. The expression builder must be used for all associated expressions used with the query.

ReadAllQuery

public ReadAllQuery(java.lang.Class classToRead,
            Call call)

PUBLIC: Return a new read all query. The call represents a database interaction such as SQL, Stored Procedure.

ReadAllQuery

public ReadAllQuery(java.lang.Object exampleObject,
            QueryByExamplePolicy policy)

PUBLIC: Return a query by example query to find all objects matching the attributes of the example object.

ReadAllQuery

public ReadAllQuery(ExpressionBuilder builder)

PUBLIC: The expression builder should be provide on creation to ensure only one is used.

ReadAllQuery

public ReadAllQuery(Call call)

PUBLIC: Create a read all query with the database call.

Method Detail

addAscendingOrdering

public void addAscendingOrdering(java.lang.String queryKeyName)

PUBLIC: Order the query results by the object's attribute or query key name.

cacheResult

public void cacheResult(java.lang.Object unwrappedOriginal)

INTERNAL:

This method is called by the object builder when building an original. It will cause the original to be cached in the query results if the query is set to do so.

Specified by:

cacheResult in class ReadQuery

clone

public java.lang.Object clone()

INTERNAL: Clone the query.

Overrides:

clone in class ObjectLevelReadQuery

execute

public java.lang.Object execute(org.eclipse.persistence.internal.sessions.AbstractSession session,
                       org.eclipse.persistence.internal.sessions.AbstractRecord row)
                         throws DatabaseException

INTERNAL: Execute the query. If there are cached results return those. This must override the super to support result caching.

Overrides:

execute in class ObjectLevelReadQuery

Parameters:

session - - the session in which the receiver will be executed.

Returns:

An object or vector, the result of executing the query.

Throws:

DatabaseException - - an error has occurred on the database

extractRemoteResult

public java.lang.Object extractRemoteResult(org.eclipse.persistence.internal.sessions.remote.Transporter transporter)

INTERNAL: Extract the correct query result from the transporter.

Overrides:

extractRemoteResult in class DatabaseQuery

getContainerPolicy

public org.eclipse.persistence.internal.queries.ContainerPolicy getContainerPolicy()

INTERNAL: Return the query's container policy.

getStartWithExpression

public Expression getStartWithExpression()

PUBLIC:

Returns:

Expression - the start with expression used to generated the hierarchical query clause in Oracle

getConnectByExpression

public Expression getConnectByExpression()

PUBLIC:

Returns:

Expression - the connect by expression used to generate the hierarchical query caluse in Oracle

getOrderSiblingsByExpressions

public java.util.List<Expression> getOrderSiblingsByExpressions()

PUBLIC:

Returns:

List<Expression> - the ordering expressions used to generate the hierarchical query clause in Oracle

hasHierarchicalExpressions

public boolean hasHierarchicalExpressions()

INTERNAL: Verify that we have hierarchical query expressions

isDefaultPropertiesQuery

public boolean isDefaultPropertiesQuery()

INTERNAL: Return true if the query uses default properties. This is used to determine if this query is cacheable. i.e. does not use any properties that may conflict with another query with the same JPQL or selection criteria.

Overrides:

isDefaultPropertiesQuery in class ObjectLevelReadQuery

equals

public boolean equals(java.lang.Object object)

INTERNAL: Return if the query is equal to the other. This is used to allow dynamic expression query SQL to be cached.

Overrides:

equals in class ObjectLevelReadQuery

isReadAllQuery

public boolean isReadAllQuery()

PUBLIC: Return if this is a read all query.

Overrides:

isReadAllQuery in class DatabaseQuery

prepareFromQuery

public void prepareFromQuery(DatabaseQuery query)

INTERNAL: Prepare the query from the prepared query. This allows a dynamic query to prepare itself directly from a prepared query instance. This is used in the JPQL parse cache to allow preparsed queries to be used to prepare dynamic queries. This only copies over properties that are configured through JPQL.

Overrides:

prepareFromQuery in class ObjectLevelReadQuery

prepareForExecution

public void prepareForExecution()
                         throws QueryException

INTERNAL: Prepare the receiver for execution in a session.

Overrides:

prepareForExecution in class ReadQuery

Throws:

QueryException

registerResultInUnitOfWork

public java.lang.Object registerResultInUnitOfWork(java.lang.Object result,
                                          org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork,
                                          org.eclipse.persistence.internal.sessions.AbstractRecord arguments,
                                          boolean buildDirectlyFromRows)

INTERNAL: All objects queried via a UnitOfWork get registered here. If the query went to the database.

Involves registering the query result individually and in totality, and hence refreshing / conforming is done here.

Specified by:

registerResultInUnitOfWork in class ObjectLevelReadQuery

Parameters:

result - may be collection (read all) or an object (read one), or even a cursor. If in transaction the shared cache will be bypassed, meaning the result may not be originals from the parent but raw database rows.

unitOfWork - the unitOfWork the result is being registered in.

arguments - the original arguments/parameters passed to the query execution. Used by conforming

buildDirectlyFromRows - If in transaction must construct a registered result from raw database rows.

Returns:

the final (conformed, refreshed, wrapped) UnitOfWork query result

registerResultSetInUnitOfWork

public java.lang.Object registerResultSetInUnitOfWork(java.sql.ResultSet resultSet,
                                             java.util.Vector fields,
                                             org.eclipse.persistence.internal.helper.DatabaseField[] fieldsArray,
                                             org.eclipse.persistence.internal.sessions.UnitOfWorkImpl unitOfWork,
                                             org.eclipse.persistence.internal.sessions.AbstractRecord arguments)
                                               throws java.sql.SQLException

INTERNAL: Version of the previous method for ResultSet optimization.

Returns:

the final (conformed, refreshed, wrapped) UnitOfWork query result

Throws:

java.sql.SQLException

remoteExecute

public java.lang.Object remoteExecute()

INTERNAL: Execute the query through remote session.

replaceValueHoldersIn

public java.util.Map replaceValueHoldersIn(java.lang.Object object,
                                  org.eclipse.persistence.internal.sessions.remote.RemoteSessionController controller)

INTERNAL: replace the value holders in the specified result object(s)

Overrides:

replaceValueHoldersIn in class DatabaseQuery

setContainerPolicy

public void setContainerPolicy(org.eclipse.persistence.internal.queries.ContainerPolicy containerPolicy)

PUBLIC: Set the container policy. Used to support different containers (e.g. Collections, Maps).

setHierarchicalQueryClause

public void setHierarchicalQueryClause(Expression startWith,
                              Expression connectBy,
                              java.util.List<Expression> orderSiblingsExpressions)

PUBLIC: Set the Hierarchical Query Clause for the query

Example:

Expression startWith = builder.get("id").equal(new Integer(100)); //can be any expression which identifies a set of employees

Expression connectBy = builder.get("managedEmployees"); //indicated the relationship that the hierarchy is based on, must be self-referential

Vector orderBy = new Vector();

orderBy.addElement(builder.get("startDate"));

readAllQuery.setHierarchicalQueryClause(startWith, connectBy, orderBy);

This query would generate SQL like this:

SELECT * FROM EMPLOYEE START WITH ID=100 CONNECT BY PRIOR ID = MANAGER_ID ORDER SIBLINGS BY START_DATE

Parameters:

startWith - Describes the START WITH clause of the query - null if not needed

connectBy - This should be a query key expression which indicates an attribute who's mapping describes the hierarchy

orderSiblingsExpressions - Contains expressions which indicate fields to be included in the ORDER SIBLINGS BY clause - null if not required

useCollectionClass

public void useCollectionClass(java.lang.Class concreteClass)

PUBLIC: Configure the mapping to use an instance of the specified container class to hold the target objects.

jdk1.2.x: The container class must implement (directly or indirectly) the Collection interface.

jdk1.1.x: The container class must be a subclass of Vector.

useCursoredStream

public void useCursoredStream()

PUBLIC: Use a CursoredStream as the result collection. The initial read size is 10 and page size is 5.

useCursoredStream

public void useCursoredStream(int initialReadSize,
                     int pageSize)

PUBLIC: Use a CursoredStream as the result collection.

Parameters:

initialReadSize - the initial number of objects to read

pageSize - the number of objects to read when more objects are needed from the database

useCursoredStream

public void useCursoredStream(int initialReadSize,
                     int pageSize,
                     ValueReadQuery sizeQuery)

PUBLIC: Use a CursoredStream as the result collection.

Parameters:

initialReadSize - the initial number of objects to read

pageSize - the number of objects to read when more objects are needed from the database

sizeQuery - a query that will return the size of the result set; this must be set if an expression is not used (i.e. custom SQL)

useMapClass

public void useMapClass(java.lang.Class concreteClass,
               java.lang.String methodName)

PUBLIC: Configure the query to use an instance of the specified container class to hold the result objects. The key used to index the value in the Map is the value returned by a call to the specified zero-argument method. The method must be implemented by the class (or a superclass) of the value to be inserted into the Map.

jdk1.2.x: The container class must implement (directly or indirectly) the Map interface.

jdk1.1.x: The container class must be a subclass of Hashtable.

The referenceClass must set before calling this method.

useScrollableCursor

public void useScrollableCursor()

PUBLIC: Use a ScrollableCursor as the result collection.

useScrollableCursor

public void useScrollableCursor(int pageSize)

PUBLIC: Use a ScrollableCursor as the result collection.

Parameters:

pageSize - the number of elements to be read into a the cursor when more elements are needed from the database.

useScrollableCursor

public void useScrollableCursor(ScrollableCursorPolicy policy)

PUBLIC: Use a ScrollableCursor as the result collection.

Parameters:

policy - the scrollable cursor policy allows for additional result set options. Example:

ScrollableCursorPolicy policy = new ScrollableCursorPolicy()

policy.setResultSetType(ScrollableCursorPolicy.TYPE_SCROLL_INSENSITIVE);

query.useScrollableCursor(policy);

supportsResultSetAccessOptimizationOnPrepare

public boolean supportsResultSetAccessOptimizationOnPrepare()

INTERNAL: Indicates whether the query can use ResultSet optimization. The method is called when the query is prepared, so it should refer only to the attributes that cannot be altered without re-preparing the query. If the query is a clone and the original has been already prepared this method will be called to set a (transient and therefore set to null) usesResultSetOptimization attribute.

Overrides:

supportsResultSetAccessOptimizationOnPrepare in class ObjectLevelReadQuery

supportsResultSetAccessOptimizationOnExecute

public boolean supportsResultSetAccessOptimizationOnExecute()

INTERNAL: Indicates whether the query can use ResultSet optimization. Note that the session must be already set. The method is called when the query is executed, so it should refer only to the attributes that can be altered without re-preparing the query.

Overrides:

supportsResultSetAccessOptimizationOnExecute in class ObjectLevelReadQuery