Examples of org.eclipse.persistence.expressions.ExpressionBuilder

Package org.eclipse.persistence.expressions

Examples of org.eclipse.persistence.expressions.ExpressionBuilder

org.eclipse.persistence.expressions.ExpressionBuilder

Purpose: Allow for instances of expression to be created. Expressions are Java object-level representations of SQL "where" clauses. The expressions attempt to mirror Java code as closely as possible.

Example:

 ExpressionBuilder employee = new ExpressionBuilder(); employee.get("firstName").equal("Bob").and(employee.get("lastName").equal("Smith")) >> equivalent Java code: (employee.getFirstName().equals("Bob")) && (employee.getLastName().equals("Smith")) >> equivalent SQL: (F_NAME = 'Bob') AND (L_NAME = 'Smith')

@see Expression

     * 
     * @param subquery
     * @return any expression
     */
    public <Y> Expression<Y> any(Subquery<Y> subquery){
        return new FunctionExpressionImpl<Y>(metamodel, (Class<Y>) subquery.getJavaType(), new ExpressionBuilder().any(((InternalSelection)subquery).getCurrentNode()), buildList(subquery), "any");
   }

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     * 
     * @param value
     * @return expression literal
     */
    public <T> Expression<T> literal(T value){
        return new ExpressionImpl<T>(metamodel, (Class<T>) (value == null? null: value.getClass()), new ConstantExpression(value, new ExpressionBuilder()), value);
    }

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     *
     * @param resultClass  type of the null literal
     * @return null expression literal
     */
    public <T> Expression<T> nullLiteral(Class<T> resultClass){
        return new ExpressionImpl<T>(metamodel, resultClass, new ConstantExpression(null, new ExpressionBuilder()), null);
    }

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     * Create expression to return current date.
     * 
     * @return expression for current date
     */
    public Expression<java.sql.Date> currentDate(){
        return new ExpressionImpl(metamodel, ClassConstants.SQLDATE, new ExpressionBuilder().currentDateDate());
    }

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     * Create expression to return current timestamp.
     * 
     * @return expression for current timestamp
     */
    public Expression<java.sql.Timestamp> currentTimestamp(){
        return new ExpressionImpl(metamodel, ClassConstants.TIMESTAMP, new ExpressionBuilder().currentTimeStamp());
    }

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     * Create expression to return current time.
     * 
     * @return expression for current time
     */
    public Expression<java.sql.Time> currentTime(){
        return new ExpressionImpl(metamodel, ClassConstants.TIME, new ExpressionBuilder().currentTime());
    }

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     * Create a coalesce expression.
     * 
     * @return coalesce expression
     */
    public <T> Coalesce<T> coalesce(){
        ArgumentListFunctionExpression coalesce = new ExpressionBuilder().coalesce();
        return new CoalesceImpl(metamodel, Object.class, coalesce, new ArrayList());
    }

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     * @param expression
     *            to be tested against the case conditions
     * @return simple case expression
     */
    public <C, R> SimpleCase<C, R> selectCase(Expression<? extends C> expression){
        ArgumentListFunctionExpression caseStatement = new ExpressionBuilder().caseStatement();
        return new SimpleCaseImpl(metamodel, Object.class, caseStatement, new ArrayList(), expression);
    }

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     * Create a general case expression.
     * 
     * @return general case expression
     */
    public <R> Case<R> selectCase(){
        ArgumentListFunctionExpression caseStatement = new ExpressionBuilder().caseConditionStatement();
        return new CaseImpl(metamodel, Object.class, caseStatement, new ArrayList());
    }

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            params.add(((InternalSelection)x).getCurrentNode());
        }
        
        return new FunctionExpressionImpl<T>(metamodel, type, ((InternalSelection)args[0]).getCurrentNode().getFunctionWithArguments(name, params), buildList(args), name);
        }else{
            return new FunctionExpressionImpl<T>(metamodel, type, new ExpressionBuilder().getFunction(name), new ArrayList(0), name);
        }
    }

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org.eclipse.persistence.descriptors.DescriptorQueryManager

org.eclipse.persistence.descriptors.SingleTableMultitenantPolicy

org.eclipse.persistence.eis.mappings.EISOneToManyMapping

org.eclipse.persistence.eis.mappings.EISOneToOneMapping

org.eclipse.persistence.internal.descriptors.CascadeLockingPolicy

org.eclipse.persistence.internal.jpa.jpql.AbstractModifyAllQueryBuilder

org.eclipse.persistence.internal.jpa.jpql.AbstractObjectLevelReadQueryVisitor

org.eclipse.persistence.internal.jpa.jpql.AbstractReadAllQueryVisitor

org.eclipse.persistence.internal.jpa.jpql.DerivedDeclaration

org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor

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