ContractAdvice (Camel :: Core Processor 3.20.4 API)

java.lang.Object
- org.apache.camel.processor.ContractAdvice

All Implemented Interfaces:

org.apache.camel.spi.CamelInternalProcessorAdvice
```
public class ContractAdvice
extends Object
implements org.apache.camel.spi.CamelInternalProcessorAdvice
```
A CamelInternalProcessorAdvice which applies Transformer and Validator according to the data type Contract.
The default camel Message implements DataTypeAware which holds a DataType to indicate current message type. If the input type declared by org.apache.camel.model.InputTypeDefinition is different from current IN message type, camel internal processor look for a Transformer which transforms from the current message type to the expected message type before routing. After routing, if the output type declared by org.apache.camel.model.OutputTypeDefinition is different from current OUT message (or IN message if no OUT), camel look for a Transformer and apply.

See Also:

Transformer, Validator, org.apache.camel.model.InputTypeDefinition, org.apache.camel.model.OutputTypeDefinition

Constructor Summary

Constructors
Constructor Description

ContractAdvice(org.apache.camel.spi.Contract contract)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`after(org.apache.camel.Exchange exchange, Object data)`
`Object`	`before(org.apache.camel.Exchange exchange)`
`boolean`	`hasState()`

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

- Constructor Detail
  - ContractAdvice
```
public ContractAdvice(org.apache.camel.spi.Contract contract)
```
- Method Detail
  - before
```
public Object before(org.apache.camel.Exchange exchange)
              throws Exception
```
    Specified by:
    
    before in interface org.apache.camel.spi.CamelInternalProcessorAdvice
    
    Throws:
    
    Exception
  - after
```
public void after(org.apache.camel.Exchange exchange,
                  Object data)
           throws Exception
```
    Specified by:
    
    after in interface org.apache.camel.spi.CamelInternalProcessorAdvice
    
    Throws:
    
    Exception
  - hasState
```
public boolean hasState()
```
    Specified by:
    
    hasState in interface org.apache.camel.spi.CamelInternalProcessorAdvice