ExpNode (IBM FHIR Server)

All Known Implementing Classes:

ACosExpNode, AddExpNode, AdditiveExpNode, AndExpNode, BetweenExpNode, BigDecimalBindMarkerNode, BinaryExpNode, BindMarkerNode, CoalesceExpNode, ColumnExpNode, ComparativeExpNode, CosExpNode, DivExpNode, DoubleBindMarkerNode, DoubleExpNode, EqExpNode, EqualityExpNode, EscapeExpNode, ExistsExpNode, GreaterEqExpNode, GreaterExpNode, InListExpNode, InstantBindMarkerNode, IntegerBindMarkerNode, IsNotNullExpNode, IsNullExpNode, LeftParenExpNode, LessEqExpNode, LessExpNode, LikeExpNode, LiteralExpNode, LongBindMarkerNode, LongExpNode, MultExpNode, MultiplicativeExpNode, NeqExpNode, NotExistsExpNode, NotExpNode, OperatorNode, OrExpNode, ParenExpNode, RightParenExpNode, SelectExpNode, SinExpNode, StringBindMarkerNode, StringExpNode, SubExpNode, UnaryExpNode
```
public interface ExpNode
```
A node in the expression tree for building SQL predicate statements

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`default boolean`	`isLeftParen()`	Is this expression node a left-paren
`default boolean`	`isOperand()`	Is this expression node an operand
`default boolean`	`isOperator()`	Is this expression node an operator
`default boolean`	`isRightParen()`	Is this expression node a right-paren
`void`	`popOperands(Stack<ExpNode> stack)`	Read the operands from the stack
`int`	`precedence()`	Precedence of this expression node.
`<T> T`	`visit(ExpNodeVisitor<T> visitor)`	Generic evaluation visitor

- Method Detail
  - visit
```
<T> T visit(ExpNodeVisitor<T> visitor)
```
    Generic evaluation visitor
    
    Type Parameters:
    
    T -
    
    Parameters:
    
    visitor -
    
    Returns:
  - precedence
```
int precedence()
```
    Precedence of this expression node. Used to parse the expression into the correct tree. We use 0 to represent the highest precedence
    
    Returns:
  - isOperator
```
default boolean isOperator()
```
    Is this expression node an operator
    
    Returns:
  - isOperand
```
default boolean isOperand()
```
    Is this expression node an operand
    
    Returns:
  - isLeftParen
```
default boolean isLeftParen()
```
    Is this expression node a left-paren
    
    Returns:
  - isRightParen
```
default boolean isRightParen()
```
    Is this expression node a right-paren
    
    Returns:
  - popOperands
```
void popOperands(Stack<ExpNode> stack)
```
    Read the operands from the stack
    
    Parameters:
    
    stack -