DyadicExpression (DataNucleus Core 6.0.1-SNAPSHOT API)

java.lang.Object
- org.datanucleus.store.query.expression.Expression
- - org.datanucleus.store.query.expression.DyadicExpression

All Implemented Interfaces:

Serializable
```
public class DyadicExpression
extends Expression
```
Expression between two other expressions and an operation. For example, "this.myField < myValue" will become left = PrimaryExpression, right = Literal, op = Expression.OP_LT. A special case is where we have an expression like "!(condition)". In this case we become left = expression, right = null, op = Expression.OP_NOT.

See Also:

Serialized Form

Nested Class Summary
- Nested classes/interfaces inherited from class org.datanucleus.store.query.expression.Expression
  Expression.DyadicOperator, Expression.MonadicOperator, Expression.Operator

Field Summary
- Fields inherited from class org.datanucleus.store.query.expression.Expression
  alias, left, op, OP_ADD, OP_AND, OP_BIT_AND, OP_BIT_OR, OP_BIT_XOR, OP_CAST, OP_COM, OP_CONCAT, OP_DISTINCT, OP_DIV, OP_EQ, OP_GT, OP_GTEQ, OP_IN, OP_IS, OP_ISNOT, OP_LIKE, OP_LT, OP_LTEQ, OP_MOD, OP_MUL, OP_NEG, OP_NOT, OP_NOTEQ, OP_NOTIN, OP_OR, OP_SUB, parent, right, symbol

Constructor Summary

Constructors
Constructor	Description
`DyadicExpression(Expression.MonadicOperator op, Expression operand)`	Perform a function `op` on `operand`
`DyadicExpression(Expression operand1, Expression.DyadicOperator op, Expression operand2)`	Performs a function on two arguments.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Symbol`	`bind(SymbolTable symtbl)`	Method to bind the expression to the symbol table as appropriate.
`Object`	`evaluate(ExpressionEvaluator eval)`	Method to evaluate this expression, using the passed evaluator.
`String`	`toString()`

Methods inherited from class org.datanucleus.store.query.expression.Expression
getAlias, getLeft, getOperator, getParent, getRight, getSymbol, setAlias, setLeft, setRight

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - DyadicExpression
```
public DyadicExpression(Expression.MonadicOperator op,
                        Expression operand)
```
    Perform a function op on operand
    
    Parameters:
    
    op - operator
    
    operand - operand
  - DyadicExpression
```
public DyadicExpression(Expression operand1,
                        Expression.DyadicOperator op,
                        Expression operand2)
```
    Performs a function on two arguments. op(operand1,operand2) operand1 op operand2
    
    Parameters:
    
    operand1 - the first expression
    
    op - the operator between operands
    
    operand2 - the second expression
- Method Detail
  - evaluate
```
public Object evaluate(ExpressionEvaluator eval)
```
    Method to evaluate this expression, using the passed evaluator.
    
    Overrides:
    
    evaluate in class Expression
    
    Parameters:
    
    eval - Evaluator
    
    Returns:
    
    The result
  - bind
```
public Symbol bind(SymbolTable symtbl)
```
    Method to bind the expression to the symbol table as appropriate.
    
    Specified by:
    
    bind in class Expression
    
    Parameters:
    
    symtbl - Symbol table
    
    Returns:
    
    The symbol for this expression
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object