Convert Header To

The ConvertHeaderTo EIP allows you to transform message header to a different type.

The Convert Header To eip supports 6 options, which are listed below.

Name Description Default Type

description

Sets the description of this node.

String

disabled

Whether to disable this EIP from the route during build time. Once an EIP has been disabled then it cannot be enabled later at runtime.

false

Boolean

name

Required Name of message header to convert its value The simple language can be used to define a dynamic evaluated header name to be used. Otherwise a constant name will be used.

String

type

Required The java type to convert to.

String

toName

To use another header to store the result. By default, the result is stored in the same header. This option allows to use another header. The simple language can be used to define a dynamic evaluated header name to be used. Otherwise a constant name will be used.

String

mandatory

When mandatory then the conversion must return a value (cannot be null), if this is not possible then NoTypeConversionAvailableException is thrown. Setting this to false could mean conversion is not possible and the value is null.

true

Boolean

charset

To use a specific charset when converting.

String
The type is a FQN class name (fully qualified), so for example java.lang.String, com.foo.MyBean etc. However, Camel has shorthand for common Java types, most noticeable String can be used instead of java.lang.String. You can also use byte[] for a byte array.

Example

For example, to convert the foo header to String:

  • Java

  • XML

  • YAML

from("seda:foo")
  .convertHeaderTo("foo", String.class)
  .log("The header content: ${header.foo}");
<route>
  <from uri="seda:foo"/>
  <convertHeaderTo name="foo" type="String"/>
  <log message="The header content: ${header.foo}"/>
</route>
- from:
    uri: seda:foo
    steps:
      - convertHeaderTo:
          name: foo
          type: String
      - log:
          message: "The header content: ${header.foo}"

Convert to another header

By default, the converted value is replaced in the existing header. However, you can tell Camel to store the result into another header, such as shown below where the value is stored in the bar header:

  • Java

  • XML

  • YAML

from("seda:foo")
  .convertHeaderTo("foo", "bar", String.class)
  .log("The header content: ${header.bar}");
<route>
  <from uri="seda:foo"/>
  <convertHeaderTo name="foo" toName="bar" type="String"/>
  <log message="The header content: ${header.bar}"/>
</route>
- from:
    uri: seda:foo
    steps:
      - convertHeaderTo:
          name: foo
          toName: bar
          type: String
      - log:
          message: "The header content: ${header.bar}"

Dynamic header name

The ConvertHeaderTo supports using Simple language for dynamic header name.

Suppose you have multiple headers:

  • region

  • emea

  • na

  • pacific

And that region points to either emea, na or pacific, which has some order details. Then you can use dynamic header to convert the header of choice. Now suppose that the region header has value emea:

  • Java

  • XML

  • YAML

from("seda:foo")
  .convertHeaderTo("${header.region}", String.class)
  .log("Order from EMEA: ${header.emea}");
<route>
  <from uri="seda:foo"/>
  <convertHeaderTo name="${header.region}" type="String"/>
  <log message="Order from EMEA: ${header.emea}"/>
</route>
- from:
    uri: seda:foo
    steps:
      - convertHeaderTo:
          name: ${header.region}
          type: String
      - log:
          message: "Order from EMEA: ${header.emea}"
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