Examples of ValueReadQuery

oracle.toplink.essentials.queryframework.ValueReadQuery

Purpose: Concrete class to perform a read of a single data value.

Responsibilities: Used in conjunction with CursoredStream size and Platform getSequence. This can be used to read a single data value (i.e. one field). A single data value is returned, or null if no rows are returned. @author James Sutherland @since TOPLink/Java 1.2
org.eclipse.persistence.queries.ValueReadQuery

Purpose: Concrete class to perform a read of a single data value.

Responsibilities: Used in conjunction with CursoredStream size and Platform getSequence. This can be used to read a single data value (i.e. one field). A single data value is returned, or null if no rows are returned. @author James Sutherland @since TOPLink/Java 1.2

Examples of org.eclipse.persistence.queries.ValueReadQuery

                    // data-read query
                    databaseQueryToInitialize = new DataReadQuery();
                }
                else if (!xrService.descriptorsByQName.containsKey(type)) {
                    // value read query
                    databaseQueryToInitialize = new ValueReadQuery();
                }
                else {
                    // read object query for the class mapped to the type
                    databaseQueryToInitialize = new ReadObjectQuery(xrService.getTypeClass(type));
                }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

            } 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);
            }
            newQuery.copyFromQuery(query);

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Examples of org.eclipse.persistence.queries.ValueReadQuery

        DatabaseQuery applyToDatabaseQuery(Object valueToApply, DatabaseQuery query, ClassLoader loader) {
            if (query.isReadAllQuery()) {
                if (!((ReadAllQuery) query).getContainerPolicy().isCursoredStreamPolicy()) {
                    ((ReadAllQuery) query).useCursoredStream();
                }
                ((CursoredStreamPolicy)((ReadAllQuery) query).getContainerPolicy()).setSizeQuery(new ValueReadQuery((String)valueToApply));
            } else if (query.isDataReadQuery()) {
                if (!((DataReadQuery) query).getContainerPolicy().isCursoredStreamPolicy()) {
                    ((DataReadQuery) query).useCursoredStream();
                }
                ((CursoredStreamPolicy)((ReadAllQuery) query).getContainerPolicy()).setSizeQuery(new ValueReadQuery((String)valueToApply));
            } else {
                throw new IllegalArgumentException(ExceptionLocalization.buildMessage("ejb30-wrong-type-for-query-hint",new Object[]{getQueryId(query), name, getPrintValue(valueToApply)}));
            }
            
            return query;

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Examples of org.eclipse.persistence.queries.ValueReadQuery

            }
            else {
                if (getOutArguments().size() == 0 && getInOutArguments().size() == 0) {
                    if (isStoredFunctionQueryHandler()) {
                        if (!xrService.descriptorsByQName.containsKey(type)) {
                            databaseQueryToInitialize = new ValueReadQuery();
                        }
                        else {
                            // read object query for the class mapped to the type
                            databaseQueryToInitialize = new ReadObjectQuery(xrService.getTypeClass(type));
                        }
                    }
                    else {
                        // special case - no out args for SP: the return
                        // will be a single int
                        // rowcount
                        databaseQueryToInitialize = new DataModifyQuery();
                    }
                }
                else {
                    if (!xrService.descriptorsByQName.containsKey(type)) {
                      if (type.equals(SXF_QNAME)) {
                        databaseQueryToInitialize = new DataReadQuery();
                      }
                      else {
                        databaseQueryToInitialize = new ValueReadQuery();
                      }
                    }
                    else {
                        // read object query for the class mapped to the type
                        databaseQueryToInitialize = new ReadObjectQuery(xrService.getTypeClass(type));

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Examples of org.eclipse.persistence.queries.ValueReadQuery

     * the returned query used until the sequence is disconnected.
     * If the platform supportsSequenceObjects then (at least) one of buildSelectQueryForSequenceObject
     * methods should return non-null query.
     */
    public ValueReadQuery buildSelectQueryForSequenceObject(String seqName, Integer size) {
        return new ValueReadQuery("select nextval(\'"  + getQualifiedName(seqName) + "\')");
    }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

    public boolean supportsIdentity() {
        return true;
    }


    public ValueReadQuery buildSelectQueryForIdentity() {
        return new ValueReadQuery("CALL IDENTITY()");
    }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

    /**
     * INTERNAL:
     * Build the identity query for native sequencing.
     */
    public ValueReadQuery buildSelectQueryForIdentity() {
        ValueReadQuery selectQuery = new ValueReadQuery();
        StringWriter writer = new StringWriter();
        writer.write("SELECT LAST_INSERT_ID()");
        selectQuery.setSQLString(writer.toString());
        return selectQuery;
    }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

     * This method returns the query to select the timestamp
     * from the server for MySQL.
     */
    public ValueReadQuery getTimestampQuery() {
        if (timestampQuery == null) {
            timestampQuery = new ValueReadQuery();
            timestampQuery.setSQLString("SELECT NOW()");
        }
        return timestampQuery;
    }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

     * This method returns the query to select the SYSTIMESTAMP as TIMESTAMPTZ
     * from the server for Oracle9i.
     */
    public ValueReadQuery getTimestampQuery() {
        if (timestampQuery == null) {
            timestampQuery = new ValueReadQuery();
            timestampQuery.setSQLString("SELECT SYSTIMESTAMP FROM DUAL");
        }
        return timestampQuery;
    }

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Examples of org.eclipse.persistence.queries.ValueReadQuery

     * from Oracle.
     * In order to execute this query a database administrator may need
     * to grant execute permission on pl/sql package DBMS_FLASHBACK.
     */
    public ValueReadQuery getSystemChangeNumberQuery() {
        ValueReadQuery sCNQuery = new ValueReadQuery();
        sCNQuery.setSQLString("SELECT DBMS_FLASHBACK.GET_SYSTEM_CHANGE_NUMBER FROM DUAL");
        return sCNQuery;
    }

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