Examples of ObjectExpression

oracle.toplink.essentials.internal.expressions.ObjectExpression
Superclass for any object type expressions.
org.datanucleus.store.mapped.expression.ObjectExpression
Representation of an Object expression in a Query. Let's take an example :-
```
 We have classes A and B, and A contains a reference to B "b". If we do a JDOQL query for class A of "b.someField == value" then "b" is interpreted first and an ObjectExpression is created to represent that object (of type B). 
```
The expression has an associated TableExpression, and a list of expressions which represent the datastore columns identifying the object (the PK fields/columns).
org.datanucleus.store.rdbms.sql.expression.ObjectExpression
Representation of an Object expression in a Query. Typically represents a persistable object, and so its identity, though could be used to represent any Object.
Let's take an example. We have classes A and B, and A contains a reference to B "b". If we do a JDOQL query for class A of "b == value" then "b" is interpreted first and an ObjectExpression is created to represent that object (of type B).
org.eclipse.persistence.internal.expressions.ObjectExpression
Superclass for any object type expressions.
org.jpox.store.mapped.expression.ObjectExpression
Representation of an Object expression in a Query. Let's take an example :-
```
 We have classes A and B, and A contains a reference to B "b". If we do a JDOQL query for class A of "b.someField == value" then "b" is interpreted first and an ObjectExpression is created to represent that object (of type B). 
```
The expression has an associated TableExpression, and a list of expressions which represent the datastore columns identifying the object (the PK fields/columns). @version $Revision: 1.59 $
org.lilystudio.smarty4j.expression.ObjectExpression
对象表达式节点, 向JVM语句栈内放入对象 @version 0.1.4, 2009/03/01 @author 欧阳先伟 @since Smarty 0.1

Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * It iterates through a list of join expressions and adds an index that represents where the
     * fields represented by that expression will appear in the row returned by a read query.
     */
    protected int computeIndexesForJoinedExpressions(List joinedExpressions, int currentIndex, AbstractSession session) {
        for (int index = 0; index < joinedExpressions.size(); index++) {
            ObjectExpression objectExpression = (ObjectExpression)joinedExpressions.get(index);
            DatabaseMapping mapping = objectExpression.getMapping();
            // Ignore nested
            if ((objectExpression.getBaseExpression() == objectExpression.getBuilder()) && (mapping != null) && mapping.isForeignReferenceMapping()) {
                getJoinedMappingIndexes_().put(mapping, new Integer(currentIndex));
            }
            ClassDescriptor descriptor = mapping.getReferenceDescriptor();
            int numberOfFields = 0;
            if (descriptor == null) {
                // Direct-collection mappings do not have descriptor.
                if (mapping.isDirectCollectionMapping()) {
                    numberOfFields = 1;
                } else if (mapping.isDirectMapMapping()) {
                    numberOfFields = 2;
                }
            } else if (objectExpression.isQueryKeyExpression() && objectExpression.isUsingOuterJoinForMultitableInheritance()) {
                numberOfFields = descriptor.getAllFields().size();
            } else {
                numberOfFields = descriptor.getFields().size();
            }
            currentIndex = currentIndex + numberOfFields;

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Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

        if ((objectExpression.getMapping() == null) || (!objectExpression.getMapping().isJoiningSupported())) {
            throw QueryException.mappingForExpressionDoesNotSupportJoining(objectExpression);
        }


        // Search if any of the expression traverse a 1-m.
        ObjectExpression baseExpression = objectExpression;
        while (!baseExpression.isExpressionBuilder()) {
            if (((QueryKeyExpression)baseExpression).shouldQueryToManyRelationship()) {
                setIsToManyJoinQuery(true);
            }
            if (baseExpression.shouldUseOuterJoin()) {
                setIsOuterJoinedAttributeQuery(true);
            }
            baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
        }
    }

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Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

        for (Iterator e = joinedExpressions.iterator(); e.hasNext();) {
            Expression expression = (Expression)e.next();


            // Expression has not yet been validated.
            if (expression.isObjectExpression()) {
                ObjectExpression joinedAttribute = (ObjectExpression)expression;


                // Expression may not have been initialized.
                joinedAttribute.getBuilder().setSession(session.getRootSession(null));
                if (joinedAttribute.getBuilder().getQueryClass() == null){
                    joinedAttribute.getBuilder().setQueryClass(descriptor.getJavaClass());
                }
                
                ClassDescriptor nestedDescriptor = joinedAttribute.getDescriptor();


                // expression may not be valid, no descriptor, validation occurs later.
                if (nestedDescriptor == null) {
                    return lockingClause;
                }

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Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * It recurses computing the nested mapping queries.
     */
    protected void computeNestedQueriesForBatchReadExpressions(List<Expression> batchReadExpressions) {
        int size = batchReadExpressions.size();
        for (int index = 0; index < size; index++) {
            ObjectExpression objectExpression = (ObjectExpression)batchReadExpressions.get(index);


            // Expression may not have been initialized.
            ExpressionBuilder builder = objectExpression.getBuilder();
            builder.setSession(getSession().getRootSession(null));
            builder.setQueryClass(getReferenceClass());            
            
            // PERF: Cache join attribute names.
            ObjectExpression baseExpression = objectExpression;
            while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
                baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
            }
            this.batchFetchPolicy.getAttributes().add(baseExpression.getName());
            
            // Ignore nested
            if (objectExpression.getBaseExpression().isExpressionBuilder()) {
                DatabaseMapping mapping = objectExpression.getMapping();
                if ((mapping != null) && mapping.isForeignReferenceMapping()) {

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Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * It recurses computing the nested mapping queries.
     */
    protected void computeNestedQueriesForBatchReadExpressions(List<Expression> batchReadExpressions) {
        int size = batchReadExpressions.size();
        for (int index = 0; index < size; index++) {
            ObjectExpression objectExpression = (ObjectExpression)batchReadExpressions.get(index);


            // Expression may not have been initialized.
            ExpressionBuilder builder = objectExpression.getBuilder();
            builder.setSession(getSession().getRootSession(null));
            builder.setQueryClass(getReferenceClass());            
            
            // PERF: Cache join attribute names.
            ObjectExpression baseExpression = objectExpression;
            while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
                baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
            }
            this.batchFetchPolicy.getAttributes().add(baseExpression.getName());
            
            // Ignore nested
            if (objectExpression.getBaseExpression().isExpressionBuilder()) {
                DatabaseMapping mapping = objectExpression.getMapping();
                if ((mapping != null) && mapping.isForeignReferenceMapping()) {

View Full Code Here

Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * This method is used when computing the nested queries for joined mappings.
     * It recurses computing the nested mapping queries and their join indexes.
     */
    protected void computeNestedQueriesForJoinedExpressions(List joinedExpressions, AbstractSession session, ObjectLevelReadQuery readQuery) {
        for (int index = 0; index < joinedExpressions.size(); index++) {
            ObjectExpression objectExpression = (ObjectExpression)joinedExpressions.get(index);


            // Expression may not have been initialized.
            objectExpression.getBuilder().setSession(session.getRootSession(null));
            if (objectExpression.getBuilder().getQueryClass() == null){
                objectExpression.getBuilder().setQueryClass(descriptor.getJavaClass());
            }
            
            // PERF: Cache join attribute names.
            ObjectExpression baseExpression = objectExpression;
            while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
                baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
            }
            this.addJoinedAttribute(baseExpression.getName());
            
            // Ignore nested
            if ((objectExpression.getBaseExpression() == objectExpression.getBuilder()) && objectExpression.getMapping().isForeignReferenceMapping()) {
                ForeignReferenceMapping mapping = (ForeignReferenceMapping)objectExpression.getMapping();

View Full Code Here

Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * It iterates through a list of join expressions and adds an index that represents where the
     * fields represented by that expression will appear in the row returned by a read query.
     */
    protected int computeIndexesForJoinedExpressions(List joinedExpressions, int currentIndex, AbstractSession session) {
        for (int index = 0; index < joinedExpressions.size(); index++) {
            ObjectExpression objectExpression = (ObjectExpression)joinedExpressions.get(index);
            DatabaseMapping mapping = objectExpression.getMapping();
            // Ignore nested
            if ((objectExpression.getBaseExpression() == objectExpression.getBuilder()) && (mapping != null) && mapping.isForeignReferenceMapping()) {
                getJoinedMappingIndexes_().put(mapping, new Integer(currentIndex));
            }
            ClassDescriptor descriptor = mapping.getReferenceDescriptor();
            int numberOfFields = 0;
            if (descriptor == null) {
                // Direct-collection mappings do not have descriptor.
                if (mapping.isDirectCollectionMapping()) {
                    numberOfFields = 1;
                } else if (mapping.isDirectMapMapping()) {
                    numberOfFields = 2;
                }
            } else if (objectExpression.isQueryKeyExpression() && objectExpression.isUsingOuterJoinForMultitableInheritance()) {
                numberOfFields = descriptor.getAllFields().size();
            } else {
                numberOfFields = descriptor.getFields().size();
            }
            if (mapping.isCollectionMapping()){

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Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

        if ((objectExpression.getMapping() == null) || (!objectExpression.getMapping().isJoiningSupported())) {
            throw QueryException.mappingForExpressionDoesNotSupportJoining(objectExpression);
        }


        // Search if any of the expression traverse a 1-m.
        ObjectExpression baseExpression = objectExpression;
        while (!baseExpression.isExpressionBuilder()) {
            if (((QueryKeyExpression)baseExpression).shouldQueryToManyRelationship()) {
                setIsToManyJoinQuery(true);
            }
            if (baseExpression.shouldUseOuterJoin()) {
                setIsOuterJoinedAttributeQuery(true);
            }
            baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
        }
    }

View Full Code Here

Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

        for (Iterator e = joinedExpressions.iterator(); e.hasNext();) {
            Expression expression = (Expression)e.next();


            // Expression has not yet been validated.
            if (expression.isObjectExpression()) {
                ObjectExpression joinedAttribute = (ObjectExpression)expression;


                // Expression may not have been initialized.
                joinedAttribute.getBuilder().setSession(session.getRootSession(null));
                if (joinedAttribute.getBuilder().getQueryClass() == null){
                    joinedAttribute.getBuilder().setQueryClass(descriptor.getJavaClass());
                }
                
                ClassDescriptor nestedDescriptor = joinedAttribute.getDescriptor();


                // expression may not be valid, no descriptor, validation occurs later.
                if (nestedDescriptor == null) {
                    return lockingClause;
                }

View Full Code Here

Examples of org.eclipse.persistence.internal.expressions.ObjectExpression

     * It recurses computing the nested mapping queries.
     */
    protected void computeNestedQueriesForBatchReadExpressions(List<Expression> batchReadExpressions) {
        int size = batchReadExpressions.size();
        for (int index = 0; index < size; index++) {
            ObjectExpression objectExpression = (ObjectExpression)batchReadExpressions.get(index);


            // Expression may not have been initialized.
            ExpressionBuilder builder = objectExpression.getBuilder();
            builder.setSession(getSession().getRootSession(null));
            builder.setQueryClass(getReferenceClass());            
            
            // PERF: Cache join attribute names.
            ObjectExpression baseExpression = objectExpression;
            while (!baseExpression.getBaseExpression().isExpressionBuilder()) {
                baseExpression = (ObjectExpression)baseExpression.getBaseExpression();
            }
            this.batchFetchPolicy.getAttributes().add(baseExpression.getName());
            
            // Ignore nested
            if (objectExpression.getBaseExpression().isExpressionBuilder()) {
                DatabaseMapping mapping = objectExpression.getMapping();
                if ((mapping != null) && mapping.isForeignReferenceMapping()) {

View Full Code Here

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