Examples of DescriptorQueryManager

oracle.toplink.essentials.descriptors.DescriptorQueryManager

Purpose: The query manager allows for the database opperations that TopLink performs to be customized by the application. For each descriptor a query can be given that controls how a operation will occur. A common example is if the application requires a stored procedure to be used to insert the object, it can override the SQL call in the insert query that TopLink will use to insert the object. Queries can be customized to extend TopLink behavior, access non-relational data or use stored procedures or customized SQL calls.

The queries that can be customized include:

insertQuery - used to insert the object
updateQuery - used to update the object
readObjectQuery - used to read a single object by primary key
readAllQuery - used to read all of the objects of the class
doesExistQuery - used to determine whether an insert or update should occur
deleteQuery - used to delete the object

@see ClassDescriptor

org.eclipse.persistence.descriptors.DescriptorQueryManager

Purpose: The query manager allows for the database operations that EclipseLink performs to be customized by the application. For each descriptor a query can be given that controls how a operation will occur. A common example is if the application requires a stored procedure to be used to insert the object, it can override the SQL call in the insert query that EclipseLink will use to insert the object. Queries can be customized to extend EclipseLink behavior, access non-relational data or use stored procedures or customized SQL calls.

The queries that can be customized include:

insertQuery - used to insert the object
updateQuery - used to update the object
readObjectQuery - used to read a single object by primary key
readAllQuery - used to read all of the objects of the class
doesExistQuery - used to determine whether an insert or update should occur
deleteQuery - used to delete the object

@see ClassDescriptor


        if (isCustomQueryUsed() == null) {
            // Check if user defined a custom query in the query manager.
            if (!isUserDefined()) {
                if (!isCallQuery()) {
                    DescriptorQueryManager descriptorQueryManager = this.descriptor.getQueryManager();
        
                    // By default all descriptors have a custom ("static") read-object query.
                    // This allows the read-object query and SQL to be prepare once.
                    if (descriptorQueryManager.hasReadObjectQuery()) {
                        // If the query require special SQL generation or execution do not use the static read object query.
                        // PERF: the read-object query should always be static to ensure no regeneration of SQL.
                        if ((!hasJoining() || !getJoinedAttributeManager().hasJoinedAttributeExpressions()) && (!hasPartialAttributeExpressions()) && (!hasAsOfClause()) && (!hasNonDefaultFetchGroup()) && (getHintString() == null)
                                && wasDefaultLockMode() && shouldIgnoreBindAllParameters() && (!hasFetchGroup()) && (getFetchGroupName() == null) && shouldUseDefaultFetchGroup()) {
                            if ((getSelectionKey() != null) || (getSelectionObject() != null)) {// Must be primary key.

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Examples of DescriptorQueryManager

Examples of org.eclipse.persistence.descriptors.DescriptorQueryManager