Examples of org.apache.openjpa.kernel.exps.Value

org.apache.openjpa.kernel.exps.Value
Interface for any non-operator in a query filter, including constants, variables, and object fields. @author Abe White


    /**
     * Returns a Value for the given node by eval'ing it.
     */
    private Value getValue(JPQLNode node, int handleVar) {
        Value val = (Value) eval(node);


        // determined how to evaluate a variable
        if (!val.isVariable())
            return val;
        else if (handleVar == VAR_PATH && !(val instanceof Path))
            return newPath(val, val.getMetaData());
        else if (handleVar == VAR_ERROR)
            throw parseException(EX_USER, "unexpected-var",
                new Object[]{ node.text }, null);
        else
            return val;

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        ctx().addVariable(id, var);
    }


    protected Value getVariable(String var) {
        Context c = ctx();
        Value v = c.getVariable(var);
        if (v != null)
            return v;
        if (c.getParent() != null)
            return c.getParent().findVariable(var);

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            super(Double.class, x);
        }


        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value = factory.sqrt(Expressions.toValue(e, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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            super(x);
        }


        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value = factory.max(Expressions.toValue(e, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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            super(x);
        }


        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value = factory.min(Expressions.toValue(e, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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            this(new Constant<Collection<?>>(x));
        }


        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value val = Expressions.toValue(e, factory, q);
            Value result;
            if (val instanceof Literal && ((Literal)val).getParseType() == Literal.TYPE_COLLECTION)
                result = factory.newLiteral(((Collection)((Literal)val).getValue()).size(), 
                    Literal.TYPE_NUMBER);
            else
                result = factory.size(val);
            result.setImplicitType(Integer.class);
            return result;
        }

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            this(path, new Constant<String>(pattern), new Constant<Integer>(from));
        }


        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value locateSearch = path.toValue(factory, q);
            Value locateFromIndex = (from == null ? null : Expressions.toValue(from, factory, q));
            Value locatePath = Expressions.toValue(pattern, factory, q);


            return factory.indexOf(locateSearch,
                locateFromIndex == null ? locatePath
                    : factory.newArgumentList(locatePath, locateFromIndex));
        }

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            this(new Constant<Number>(Number.class, x), y);
        }
        
        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value= (e2 == null) 
            ?   factory.sum(Expressions.toValue(e1, factory, q))
            :   factory.add(
                   Expressions.toValue(e1, factory, q), 
                   Expressions.toValue(e2, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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            this(new Constant<Number>(Number.class, x), y);
        }
        
        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value = factory.subtract(
                Expressions.toValue(e1, factory, q), 
                Expressions.toValue(e2, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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            this(new Constant<Number>(x), y);
        }
        
        @Override
        public Value toValue(ExpressionFactory factory, CriteriaQueryImpl<?> q) {
            Value value = factory.divide(
                Expressions.toValue(e1, factory, q), 
                Expressions.toValue(e2, factory, q));
            value.setImplicitType(getJavaType());
            return value;
        }

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org.apache.openjpa.jdbc.kernel.exps.JDBCExpressionFactory

org.apache.openjpa.kernel.jpql.JPQLExpressionBuilder

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org.apache.openjpa.persistence.criteria.CriteriaQueryImpl

org.apache.openjpa.persistence.criteria.Expressions$Abs

org.apache.openjpa.persistence.criteria.Expressions$Avg

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