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Groovy example source code file (GroovyASTTransformation.java)

This example Groovy source code file (GroovyASTTransformation.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

annotation, compilephase, compilephase, groovyasttransformation, groovyasttransformation

The Groovy GroovyASTTransformation.java source code

/*
 * Copyright 2008 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.codehaus.groovy.transform;

import org.codehaus.groovy.control.CompilePhase;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
 * This is an annotation on a class, currently just {@link ASTTransformation}.
 * This provides information about how and when to apply the transformation,
 * such as what phase it should be applied in.
 *
 * The allowed phase is a function of how the transformation is introduced
 * into the compile process.  If the transform is automatically added via a
 * marker annotation only the SEMANTIC_ANALYSIS and latter phases are legal
 * for the phase().  This is because the annotations are not inspected until
 * after the classes are all resolved.
 *
 * Also, only annotation types present during the SEMANTIC_ANALYSIS phase
 * will be handled.  Transformations adding other annotations that are
 * transformable will have those new annotations only considered in
 * latter phases, and only if the type was present in the source unit
 * during SEMANTIC_ANALYSIS.
 *
 * @see ASTTransformation
 * @author Danno Ferrin (shemnon)
 */
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.TYPE)
public @interface GroovyASTTransformation {
    CompilePhase phase() default CompilePhase.CANONICALIZATION;
}

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