HeaderExpression (Camel :: Core Model 3.18.2 API)

java.lang.Object
- org.apache.camel.model.language.ExpressionDefinition
- - org.apache.camel.model.language.HeaderExpression

All Implemented Interfaces:

org.apache.camel.Expression, org.apache.camel.ExpressionFactory, HasExpressionType, org.apache.camel.Predicate, org.apache.camel.PredicateFactory, org.apache.camel.spi.ExpressionFactoryAware, org.apache.camel.spi.PredicateFactoryAware
```
@Metadata(firstVersion="1.5.0",
          label="language,core",
          title="Header")
public class HeaderExpression
extends ExpressionDefinition
```
Gets a header from the Exchange.

- Constructor Summary
  
  Constructors
  Constructor Description
  
  HeaderExpression()
  
  HeaderExpression(String expression)
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  String getLanguage()
  - Methods inherited from class org.apache.camel.model.language.ExpressionDefinition
    createExpression, createPredicate, evaluate, getExpression, getExpressionFactory, getExpressionType, getExpressionValue, getId, getLabel, getLabel, getPredicate, getPredicateFactory, getTrim, init, initPredicate, matches, setExpression, setExpressionType, setExpressionValue, setId, setTrim, toString
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - HeaderExpression
```
public HeaderExpression()
```
  - HeaderExpression
```
public HeaderExpression(String expression)
```
- Method Detail
  - getLanguage
```
public String getLanguage()
```
    Overrides:
    
    getLanguage in class ExpressionDefinition