Package org.eclipse.persistence.internal.databaseaccess

Examples of org.eclipse.persistence.internal.databaseaccess.DatabaseCall

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    public Vector selectAllRowsFromConcreteTable() throws DatabaseException {
        ObjectLevelReadQuery query = (ObjectLevelReadQuery)this.query;
        // PERF: First check the subclass calls cache for the prepared call.
        // Must clear the translation row to avoid in-lining parameters unless not a prepared query.
        boolean shouldPrepare = query.shouldPrepare();
        DatabaseCall call = null;
        if (shouldPrepare) {
            call = query.getConcreteSubclassCalls().get(query.getReferenceClass());
        }
        if (call == null) {
            AbstractRecord translationRow = query.getTranslationRow();
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     * This is used from query  mechanism during an abstract-multiple table read.
     */
    public AbstractRecord selectOneRowFromConcreteTable() throws DatabaseException {
        ObjectLevelReadQuery query = (ObjectLevelReadQuery)this.query;
        // PERF: First check the subclass calls cache for the prepared call.
        DatabaseCall call = query.getConcreteSubclassCalls().get(query.getReferenceClass());
        if (call == null) {
            setSQLStatement(buildConcreteSelectStatement());
            // Must also build the call.
            super.prepareSelectOneRow();
            query.getConcreteSubclassCalls().put(query.getReferenceClass(), (DatabaseCall)this.call);
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        writeQuery.setAccessor(accessor);
        //build a select statement form the query
        SQLSelectStatement selectStatement = buildSelectStatementForLocator(writeQuery, dbCall, session);

        //then build a call from the statement
        DatabaseCall call = buildCallFromSelectStatementForLocator(selectStatement, writeQuery, dbCall, session);

        accessor.executeCall(call, call.getQuery().getTranslationRow(), session);
    }
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    /**
    * Build the sql call from the select statement for selecting the locator
    */
    private DatabaseCall buildCallFromSelectStatementForLocator(SQLSelectStatement selectStatement, WriteObjectQuery writeQuery, DatabaseCall dbCall, AbstractSession session) {
        DatabaseCall call = selectStatement.buildCall(session);
        // Locator LOB must not be wrapped (WLS wraps LOBs).
        call.setIsNativeConnectionRequired(this.isNativeConnectionRequired);
       
        //the LOB context must be passed into the new call object
        call.setContexts(dbCall.getContexts());
        //need to explicitly define one row return, otherwise, EL assumes multiple rows return and confuses the accessor
        call.returnOneRow();
        //the query object has to be set in order to access to the platform and login objects
        call.setQuery(writeQuery);
        // prepare it
        call.prepare(session);
        //finally do the translation
        call.translate(writeQuery.getTranslationRow(), writeQuery.getModifyRow(), session);
        return call;
    }
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        }

        //all INSERTs have been executed, time to execute the SELECTs
        try {
            for (Iterator callIt = calls.iterator(); callIt.hasNext();) {
                DatabaseCall dbCall = (DatabaseCall)callIt.next();
                buildAndExecuteCall(dbCall, session);
            }
        } finally {
            //after executing all select calls, need to empty the collection.
            //this is necessary in the nested unit of work cases.
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     */
    public void prepareInsertObject() {
        if (hasMultipleCalls()) {
            int size = this.calls.size();
            for (int index = 0; index < size; index++) {
                DatabaseCall call = (DatabaseCall)this.calls.get(index);
                if (!call.isReturnSet()) {
                    call.returnNothing();
                }
            }
        } else {
            if (!this.call.isReturnSet()) {
                this.call.returnNothing();
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     */
    public void prepareUpdateObject() {
        if (hasMultipleCalls()) {
            int size = this.calls.size();
            for (int index = 0; index < size; index++) {
                DatabaseCall call = (DatabaseCall)this.calls.get(index);
                if (!call.isReturnSet()) {
                    call.returnNothing();
                }
            }
        } else if (getCall() != null) {
            if (!call.isReturnSet()) {
                this.call.returnNothing();
            }
        }
        prepareCall();
    }
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    public Vector selectAllRowsFromConcreteTable() throws DatabaseException {
        ObjectLevelReadQuery query = (ObjectLevelReadQuery)this.query;
        // PERF: First check the subclass calls cache for the prepared call.
        // Must clear the translation row to avoid in-lining parameters unless not a prepared query.
        boolean shouldPrepare = query.shouldPrepare();
        DatabaseCall call = null;
        if (shouldPrepare) {
            call = query.getConcreteSubclassCalls().get(query.getReferenceClass());
        }
        if (call == null) {
            AbstractRecord translationRow = query.getTranslationRow();
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    public AbstractRecord selectOneRowFromConcreteTable() throws DatabaseException {
        ObjectLevelReadQuery query = (ObjectLevelReadQuery)this.query;
        // PERF: First check the subclass calls cache for the prepared call.
        // Must clear the translation row to avoid in-lining parameters unless not a prepared query.
        boolean shouldPrepare = query.shouldPrepare();
        DatabaseCall call = null;
        if (shouldPrepare) {
            call = query.getConcreteSubclassCalls().get(query.getReferenceClass());
        }
        if (call == null) {
            AbstractRecord translationRow = query.getTranslationRow();
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     * 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) usesResultSetAccessOptimization attribute.
     */
    public boolean supportsResultSetAccessOptimizationOnPrepare() {
        DatabaseCall call = getCall();
        return ((call != null) && call.getReturnsResultSet()) && // must return ResultSet
            (!hasJoining() || !this.joinedAttributeManager.isToManyJoin()) &&
            (!this.descriptor.hasInheritance() ||
                    !this.descriptor.getInheritancePolicy().hasClassExtractor() &&  // ClassExtractor requires the whole row
                    (shouldOuterJoinSubclasses() || !this.descriptor.getInheritancePolicy().requiresMultipleTableSubclassRead() || this.descriptor.getInheritancePolicy().hasView())); // don't know how to handle select class type call - ResultSet optimization breaks it.
    }
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Related Classes of org.eclipse.persistence.internal.databaseaccess.DatabaseCall

  • org.eclipse.persistence.descriptors.ClassDescriptor
  • org.eclipse.persistence.descriptors.ReturningPolicy
  • org.eclipse.persistence.internal.expressions.SQLStatement
  • org.eclipse.persistence.internal.helper.LOBValueWriter
  • org.eclipse.persistence.internal.queries.DatasourceCallQueryMechanism
  • org.eclipse.persistence.internal.queries.ExpressionQueryMechanism
  • org.eclipse.persistence.internal.sessions.AbstractRecord
  • org.eclipse.persistence.internal.sessions.AbstractSession
  • org.eclipse.persistence.queries.ObjectLevelReadQuery
  • org.eclipse.persistence.queries.ReadQuery
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