Examples of org.eclipse.persistence.queries.DirectReadQuery

org.eclipse.persistence.queries.DirectReadQuery

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. @author Yvon Lavoie @since TOPLink/Java 1.0

            } else if (valueToApply.equals(QueryType.DataModify)) {
                newQuery = new DataModifyQuery();
            } else if (valueToApply.equals(QueryType.DataRead)) {
                newQuery = new DataReadQuery();
            } else if (valueToApply.equals(QueryType.DirectRead)) {
                newQuery = new DirectReadQuery();
            } else if (valueToApply.equals(QueryType.ValueRead)) {
                newQuery = new ValueReadQuery();
            } else {
                Class queryClass = loadClass((String)valueToApply, query, loader);
                newQuery = (DatabaseQuery)newInstance(queryClass, query, QueryHints.QUERY_TYPE);

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    /**
     * INTERNAL:
     * Returns a query that
     */
    ReadQuery getLockRelationTableQueryClone(AbstractSession session, short lockMode) {
        DirectReadQuery lockRelationTableQueryClone = (DirectReadQuery)lockRelationTableQuery.clone(); 
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause((Expression)lockRelationTableQuery.getSelectionCriteria().clone());
        statement.setLockingClause(new ForUpdateClause(lockMode));
        statement.normalize(session, null);
        lockRelationTableQueryClone.setSQLStatement(statement);
        lockRelationTableQueryClone.setIsExecutionClone(true);
        return lockRelationTableQueryClone;
    }

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    /**
     * INTERNAL:
     * Initialize lockRelationTableQuery.
     */
    protected void initializeLockRelationTableQuery(AbstractSession session, ForeignReferenceMapping mapping, Expression startCriteria) {
        lockRelationTableQuery = new DirectReadQuery();
        Expression criteria = buildSelectionCriteriaAndAddFieldsToQueryInternal(mapping, startCriteria, false, false);
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause(criteria);

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            } else if (valueToApply.equals(QueryType.DataModify)) {
                newQuery = new DataModifyQuery();
            } else if (valueToApply.equals(QueryType.DataRead)) {
                newQuery = new DataReadQuery();
            } else if (valueToApply.equals(QueryType.DirectRead)) {
                newQuery = new DirectReadQuery();
            } else if (valueToApply.equals(QueryType.ValueRead)) {
                newQuery = new ValueReadQuery();
            } else {
                Class queryClass = loadClass((String)valueToApply, query, loader);
                newQuery = (DatabaseQuery)newInstance(queryClass, query, QueryHints.QUERY_TYPE);

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            } else if (valueToApply.equals(QueryType.DataModify)) {
                newQuery = new DataModifyQuery();
            } else if (valueToApply.equals(QueryType.DataRead)) {
                newQuery = new DataReadQuery();
            } else if (valueToApply.equals(QueryType.DirectRead)) {
                newQuery = new DirectReadQuery();
            } else if (valueToApply.equals(QueryType.ValueRead)) {
                newQuery = new ValueReadQuery();
            } else {
                Class queryClass = loadClass((String)valueToApply, query, loader);
                newQuery = (DatabaseQuery)newInstance(queryClass, query, QueryHints.QUERY_TYPE);

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    /**
     * INTERNAL:
     * Returns a query that
     */
    ReadQuery getLockRelationTableQueryClone(AbstractSession session, short lockMode) {
        DirectReadQuery lockRelationTableQueryClone = (DirectReadQuery)lockRelationTableQuery.clone(); 
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause((Expression)lockRelationTableQuery.getSelectionCriteria().clone());
        statement.setLockingClause(new ForUpdateClause(lockMode));
        statement.normalize(session, null);
        lockRelationTableQueryClone.setSQLStatement(statement);
        lockRelationTableQueryClone.setIsExecutionClone(true);
        return lockRelationTableQueryClone;
    }

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    /**
     * INTERNAL:
     * Initialize lockRelationTableQuery.
     */
    protected void initializeLockRelationTableQuery(AbstractSession session, ForeignReferenceMapping mapping, Expression startCriteria) {
        lockRelationTableQuery = new DirectReadQuery();
        Expression criteria = buildSelectionCriteriaAndAddFieldsToQueryInternal(mapping, startCriteria, false, false);
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause(criteria);

View Full Code Here

    /**
     * INTERNAL:
     * Returns a query that
     */
    ReadQuery getLockRelationTableQueryClone(AbstractSession session, short lockMode) {
        DirectReadQuery lockRelationTableQueryClone = (DirectReadQuery)lockRelationTableQuery.clone(); 
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause((Expression)lockRelationTableQuery.getSelectionCriteria().clone());
        statement.setLockingClause(new ForUpdateClause(lockMode));
        statement.normalize(session, null);
        lockRelationTableQueryClone.setSQLStatement(statement);
        lockRelationTableQueryClone.setIsExecutionClone(true);
        return lockRelationTableQueryClone;
    }

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    /**
     * INTERNAL:
     * Initialize lockRelationTableQuery.
     */
    protected void initializeLockRelationTableQuery(AbstractSession session, ForeignReferenceMapping mapping, Expression startCriteria) {
        lockRelationTableQuery = new DirectReadQuery();
        Expression criteria = buildSelectionCriteriaAndAddFieldsToQueryInternal(mapping, startCriteria, false, false);
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField(this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause(criteria);

View Full Code Here

    /**
     * INTERNAL:
     * Returns a query that
     */
    ReadQuery getLockRelationTableQueryClone(AbstractSession session, short lockMode) {
        DirectReadQuery lockRelationTableQueryClone = (DirectReadQuery)lockRelationTableQuery.clone(); 
        SQLSelectStatement statement = new SQLSelectStatement();
        statement.addTable(this.relationTable);
        statement.addField((DatabaseField)this.sourceRelationKeyFields.get(0).clone());
        statement.setWhereClause((Expression)lockRelationTableQuery.getSelectionCriteria().clone());
        statement.setLockingClause(new ForUpdateClause(lockMode));
        statement.normalize(session, null);
        lockRelationTableQueryClone.setSQLStatement(statement);
        lockRelationTableQueryClone.setIsExecutionClone(true);
        return lockRelationTableQueryClone;
    }

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Related Classes of org.eclipse.persistence.queries.DirectReadQuery

org.eclipse.persistence.internal.jpa.QueryHintsHandler$QueryTypeHint

org.eclipse.persistence.internal.sessions.AbstractRecord

org.eclipse.persistence.mappings.RelationTableMechanism

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