FieldExpressionHandler (platform/sdk 5.6.1.0 API)

java.lang.Object
- com.attivio.sdk.search.fields.FieldExpressionHandler

All Implemented Interfaces:

java.util.function.Function<FieldExpression,FieldExpression>
```
@Deprecated
public abstract class FieldExpressionHandler
extends java.lang.Object
implements java.util.function.Function<FieldExpression,FieldExpression>
```
Deprecated.
Use Function invocations instead.

FieldExpressionHandler is used for traversing and transforming field expressions.

Constructor Summary

Constructors
Constructor Description

FieldExpressionHandler()
Deprecated.

Method Summary

All Methods Instance Methods Abstract Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`FieldExpression`	`apply(FieldExpression field)`	Deprecated. Implements functional interface, calling `handleFieldExpression(FieldExpression)`.
`abstract FieldExpression`	`handleFieldExpression(FieldExpression field)`	Deprecated. Method called for every FieldExpression encountered while traversing a top level FieldExpression.

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

Methods inherited from interface java.util.function.Function
andThen, compose

- Constructor Detail
  - FieldExpressionHandler
```
public FieldExpressionHandler()
```
    Deprecated.
- Method Detail
  - handleFieldExpression
```
public abstract FieldExpression handleFieldExpression(FieldExpression field)
```
    Deprecated.
    
    Method called for every FieldExpression encountered while traversing a top level FieldExpression.
    To delete the encountered FieldExpression from the tree, return null from this method.
    To replace the encountered FieldExpression with a new value, return a new FieldExpression.
    NOTE: if field has child nodes, this method will be called after the child nodes have been traversed.
    CAUTION: any caller of this method must ensure that field is not null.
    
    Parameters:
    
    field - The FieldExpression currently being traversed.
    
    Returns:
    
    the FieldExpression to replace field in the tree. Return null to delete this FieldExpression.
  - apply
```
public final FieldExpression apply(FieldExpression field)
```
    Deprecated.
    
    Implements functional interface, calling handleFieldExpression(FieldExpression).
    
    Specified by:
    
    apply in interface java.util.function.Function<FieldExpression,FieldExpression>