How to use

multiply

method

in

org.eclipse.persistence.expressions.ExpressionMath

/**
 * PUBLIC:
 * Return a new expression that applies the function to the given expression.
 */
public static Expression multiply(Expression left, int right) {
  return multiply(left, Integer.valueOf(right));
}

/**
 * PUBLIC:
 * Return a new expression that applies the function to the given expression.
 */
public static Expression multiply(Expression left, int right) {
  return multiply(left, new Integer(right));
}

/**
 * PUBLIC:
 * Return a new expression that applies the function to the given expression.
 */
public static Expression multiply(Expression left, int right) {
  return multiply(left, Integer.valueOf(right));
}

/**
 * {@inheritDoc}
 */
@Override
public void visit(MultiplicationExpression expression) {
  List<Class<?>> types = new ArrayList<Class<?>>(2);
  // Create the left side of the multiplication expression
  expression.getLeftExpression().accept(this);
  Expression leftExpression = queryExpression;
  types.add(type[0]);
  // Create the right side of the multiplication expression
  expression.getRightExpression().accept(this);
  Expression rightExpression = queryExpression;
  types.add(type[0]);
  // Now create the multiplication expression
  queryExpression = ExpressionMath.multiply(leftExpression, rightExpression);
  // Set the expression type
  Collections.sort(types, NumericTypeComparator.instance());
  type[0] = types.get(0);
}

/**
 * {@inheritDoc}
 */
@Override
public void visit(MultiplicationExpression expression) {
  List<Class<?>> types = new ArrayList<Class<?>>(2);
  // Create the left side of the multiplication expression
  expression.getLeftExpression().accept(this);
  Expression leftExpression = queryExpression;
  types.add(type[0]);
  // Create the right side of the multiplication expression
  expression.getRightExpression().accept(this);
  Expression rightExpression = queryExpression;
  types.add(type[0]);
  // Now create the multiplication expression
  queryExpression = ExpressionMath.multiply(leftExpression, rightExpression);
  // Set the expression type
  Collections.sort(types, NumericTypeComparator.instance());
  type[0] = types.get(0);
}

/**
 * INTERNAL
 * Generate the expression. The steps are:
 * 1. Generate the expression for the left node
 * 2. Add the .multiply to the where clause returned from step 1
 * 3. Generate the expression for the right side and use it as the parameter for the .multiply()
 * 4. Return the completed where clause to the caller
 */
public Expression generateExpression(GenerationContext context) {
  Expression whereClause = getLeft().generateExpression(context);
  whereClause = ExpressionMath.multiply(whereClause, getRight().generateExpression(context));
  return whereClause;
}

/**
 * INTERNAL
 * Generate the expression. The steps are:
 * 1. Generate the expression for the left node
 * 2. Add the .multiply to the where clause returned from step 1
 * 3. Generate the expression for the right side and use it as the parameter for the .multiply()
 * 4. Return the completed where clause to the caller
 */
public Expression generateExpression(GenerationContext context) {
  Expression whereClause = getLeft().generateExpression(context);
  whereClause = ExpressionMath.multiply(whereClause, getRight().generateExpression(context));
  return whereClause;
}

/**
 * INTERNAL
 * Generate the expression. The steps are:
 * 1. Generate the expression for the left node
 * 2. Add the .multiply to the where clause returned from step 1
 * 3. Generate the expression for the right side and use it as the parameter for the .multiply()
 * 4. Return the completed where clause to the caller
 */
public Expression generateExpression(GenerationContext context) {
  Expression whereClause = getLeft().generateExpression(context);
  whereClause = ExpressionMath.multiply(whereClause, getRight().generateExpression(context));
  return whereClause;
}

/**
 * Create an expression that returns the product of its arguments.
 * 
 * @param x
 *            expression
 * @param y
 *            value
 * @return product
 */
public <N extends Number> Expression<N> prod(Expression<? extends N> x, N y){
  return new FunctionExpressionImpl(this.metamodel, (Class<N>)BasicTypeHelperImpl.getInstance().extendedBinaryNumericPromotion(x.getJavaType(), y.getClass()), ExpressionMath.multiply(((InternalSelection)x).getCurrentNode(),y), buildList(x,internalLiteral(y)), "prod");
}

/**
 * Create an expression that returns the product of its arguments.
 * 
 * @param x
 *            value
 * @param y
 *            expression
 * @return product
 */
public <N extends Number> Expression<N> prod(N x, Expression<? extends N> y){
  return new FunctionExpressionImpl(this.metamodel, (Class<N>)BasicTypeHelperImpl.getInstance().extendedBinaryNumericPromotion(x.getClass(), y.getJavaType()), ExpressionMath.multiply(new ConstantExpression(x, ((InternalSelection)y).getCurrentNode()),((InternalSelection)y).getCurrentNode()), buildList(internalLiteral(x),y), "prod");
}

/**
 * Create an expression that returns the product of its arguments.
 * 
 * @param x
 *            expression
 * @param y
 *            expression
 * @return product
 */
public <N extends Number> Expression<N> prod(Expression<? extends N> x, Expression<? extends N> y){
  return new FunctionExpressionImpl(this.metamodel, (Class<N>)BasicTypeHelperImpl.getInstance().extendedBinaryNumericPromotion(x.getJavaType(), y.getJavaType()), ExpressionMath.multiply(((InternalSelection)x).getCurrentNode(),((InternalSelection)y).getCurrentNode()), buildList(x,y), "prod");
}