Package org.eclipse.persistence.internal.expressions

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

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     * @param y
     *            expression
     * @return sum
     */
    public <N extends Number> Expression<N> sum(N x, Expression<? extends N> y){
        return new FunctionExpressionImpl(this.metamodel, (Class<N>)BasicTypeHelperImpl.getInstance().extendedBinaryNumericPromotion(x.getClass(), y.getJavaType()), ExpressionMath.add(new ConstantExpression(x, ((InternalSelection)y).getCurrentNode()),((InternalSelection)y).getCurrentNode()), buildList(internalLiteral(x),y), "sum");
    }
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     * @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");
    }
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     * @param y
     *            expression
     * @return quotient
     */
    public Expression<Number> quot(Number x, Expression<? extends Number> y){
        return new FunctionExpressionImpl(this.metamodel, ClassConstants.NUMBER, ExpressionMath.divide(new ConstantExpression(x, ((InternalSelection)y).getCurrentNode()),((InternalSelection)y).getCurrentNode()), buildList(internalLiteral(x),y), "quot");
    }
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     */
    public <T> Expression<T> literal(T value){
        if (value == null) {
            throw new IllegalArgumentException( ExceptionLocalization.buildMessage("jpa_criteriaapi_null_literal_value", new Object[]{}));
        }
        return new ExpressionImpl<T>(metamodel, (Class<T>) (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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     *
     * @param value
     * @return expression literal
     */
    protected <T> Expression<T> internalLiteral(T value){
        return new ExpressionImpl<T>(metamodel, (Class<T>) (value == null? null: value.getClass()), new ConstantExpression(value, new ExpressionBuilder()), value);
    }
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    // First create the Expression that is prepended with the unary sign
    expression.getExpression().accept(this);
    Expression arithmeticFactor = queryExpression;

    // Create an expression for the constant 0 (zero)
    queryExpression = new ConstantExpression(0, new ExpressionBuilder());

    // "- <something>" is really "0 - <something>"
    queryExpression = ExpressionMath.subtract(queryExpression, arithmeticFactor);

    // Note: The type will be calculated when traversing the sub-expression
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   */
  @Override
  public void visit(EntityTypeLiteral expression) {
    ClassDescriptor descriptor = queryContext.getDescriptor(expression.getEntityTypeName());
    type[0] = descriptor.getJavaClass();
    queryExpression = new ConstantExpression(type[0], queryContext.getBaseExpression());
  }
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      subquery.addNonFetchJoinedAttribute(expr);
    }

    subquery.clearItems();

    Expression one = new ConstantExpression(1, new ExpressionBuilder());
    subquery.addItem("one", one);
    subquery.dontUseDistinct();

    // Now create the EXISTS expression
    queryExpression = queryContext.getBaseExpression();
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    // Entity type name
    if (typeExpression) {
      typeExpression = false;
      ClassDescriptor descriptor = queryContext.getDescriptor(expression.getText());
      type[0] = descriptor.getJavaClass();
      queryExpression = new ConstantExpression(type[0], queryContext.getBaseExpression());
    }
    else {
      String variableName = expression.getVariableName();

      // A result variable is parsed as an identification variable
      // TODO: Do we still need to do this since the following does:
      // queryContext.findQueryExpression(variableName)
      if (queryContext.isResultVariable(variableName)) {
        queryExpression = queryContext.getQueryExpression(variableName);
      }
      else {

        // Check if it's an entity type name
        if (!expression.isVirtual()) {
          ClassDescriptor descriptor = queryContext.getDescriptor(expression.getText());

          // Entity type name
          if (descriptor != null) {
            type[0] = descriptor.getJavaClass();
            queryExpression = new ConstantExpression(type[0], queryContext.getBaseExpression());
            return;
          }
        }

        // Identification variable, it's important to use findQueryExpression() and not
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Related Classes of org.eclipse.persistence.internal.expressions.ConstantExpression

  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor
  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor$ComparisonExpressionVisitor
  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor$InExpressionBuilder
  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor$InExpressionBuilder$InItemExpressionVisitor
  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor$InExpressionExpressionBuilder
  • org.eclipse.persistence.internal.jpa.jpql.ExpressionBuilderVisitor$PathResolver
  • org.eclipse.persistence.internal.jpa.parsing.ExistsNode
  • org.eclipse.persistence.internal.jpa.parsing.UnaryMinus
  • org.eclipse.persistence.internal.jpa.parsing.VariableNode
  • org.eclipse.persistence.internal.jpa.querydef.CommonAbstractCriteriaImpl
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