# Compilation Participants

###### Identifier:

org.eclipse.jdt.core.compilationParticipant

###### Since:

3.2

###### Description:

This extension point allows clients to participate in the compilation process by receiving notifications at various stages of build and reconcile, via a org.eclipse.jdt.core.compiler.CompilationParticipant.

###### Configuration Markup:

<!ELEMENT extension (compilationParticipant*)>

<!ATTLIST extension

point CDATA #REQUIRED

id CDATA #IMPLIED

name CDATA #IMPLIED>

<!ELEMENT compilationParticipant (requires* , managedMarker*)>

<!ATTLIST compilationParticipant

class CDATA #REQUIRED

id CDATA #REQUIRED

modifiesEnvironment (true | false)

createsProblems (true | false)

requiredSourceLevel CDATA #IMPLIED>

definition of a compilation participant. This definition allows to order participants. Participants are run by group. The group of participants that modify the environment is run first, then the group of participants that create problems is run, finally the group of other participants is run. Inside each group, participants are ordered using their 'requires' attributes. If a 'requires' attribute point to a participant that doesn't belong to the group, it is ignored.

- class - the class that implements this compilation participant. This class must implement a public subclass of `org.eclipse.jdt.core.compiler.CompilationParticipant` with a public 0-argument constructor.
- id - a unique identifier for this participant
- modifiesEnvironment - optionally specify whether this compilation participant modifies the environment, thus affecting binding resolution. If not specified, false is assumed.
- createsProblems - optionally specifies whether this compilation participant creates problems. If not specified, false is assumed.
- requiredSourceLevel - the required source level this participant needs (one of the JavaCore.VERSION* constants). If a project's source level is below this required source level, the participant will not be invoked. If this attribute is not specified, the participant will be invoked for any source level.

<!ELEMENT requires EMPTY>

<!ATTLIST requires

id CDATA #REQUIRED>

a participant that is required to run this compilation participant

- id - the unique identifier of the participant that is required

<!ELEMENT managedMarker EMPTY>

<!ATTLIST managedMarker

markerType CDATA #REQUIRED>

a managed marker is created from the recorded problems (see BuildContext#recordNewProblems(CategorizedProblem[])) and is removed when the corresponding source file is re-built or when the project is cleaned

- markerType - the type of the managed marker

###### Examples:

Example of a declaration of a `compilationParticipant`:

    <extension
          id="apt"
          name="%annotationProcessingName"
          point="org.eclipse.jdt.core.compilationParticipant">
       <compilationParticipant
             class="org.eclipse.jdt.apt.core.internal.AptCompilationParticipant"
             id="APT"
             requiredSourceLevel="1.5">
          <managedMarker markerType="org.eclipse.jdt.apt.core.compile.problem"/>
       </compilationParticipant>
    </extension>

Copyright (c) 2006 BEA Systems, Inc and others.
This program and the accompanying materials are made available under the terms of the Eclipse Public License 2.0 which accompanies this distribution, and is available at https://www.eclipse.org/legal/epl-v20.html/ SPDX-License-Identifier: EPL-2.0