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Groovy: A powerful, dynamic language for the JVM
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.ast;
import groovy.lang.Mixin;
import org.codehaus.groovy.ast.expr.ClassExpression;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.ListExpression;
import org.codehaus.groovy.ast.stmt.BlockStatement;
import org.codehaus.groovy.control.CompilePhase;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.transform.AbstractASTTransformation;
import org.codehaus.groovy.transform.GroovyASTTransformation;
import static org.codehaus.groovy.ast.ClassHelper.make;
import static org.codehaus.groovy.ast.tools.GeneralUtils.callX;
import static org.codehaus.groovy.ast.tools.GeneralUtils.classX;
import static org.codehaus.groovy.ast.tools.GeneralUtils.propX;
import static org.codehaus.groovy.ast.tools.GeneralUtils.stmt;
/**
* @deprecated static mixins have been deprecated in favour of traits (trait keyword).
*/
@Deprecated
@GroovyASTTransformation(phase = CompilePhase.CANONICALIZATION)
public class MixinASTTransformation extends AbstractASTTransformation {
private static final ClassNode MY_TYPE = make(Mixin.class);
public void visit(ASTNode nodes[], SourceUnit source) {
init(nodes, source);
AnnotationNode node = (AnnotationNode) nodes[0];
AnnotatedNode parent = (AnnotatedNode) nodes[1];
if (!MY_TYPE.equals(node.getClassNode()))
return;
final Expression expr = node.getMember("value");
if (expr == null) {
return;
}
Expression useClasses = null;
if (expr instanceof ClassExpression) {
useClasses = expr;
} else if (expr instanceof ListExpression) {
ListExpression listExpression = (ListExpression) expr;
for (Expression ex : listExpression.getExpressions()) {
if (!(ex instanceof ClassExpression))
return;
}
useClasses = expr;
}
if (useClasses == null)
return;
if (parent instanceof ClassNode) {
ClassNode annotatedClass = (ClassNode) parent;
final Parameter[] noparams = Parameter.EMPTY_ARRAY;
MethodNode clinit = annotatedClass.getDeclaredMethod("", noparams);
if (clinit == null) {
clinit = annotatedClass.addMethod("", ACC_PUBLIC | ACC_STATIC | ACC_SYNTHETIC, ClassHelper.VOID_TYPE, noparams, null, new BlockStatement());
clinit.setSynthetic(true);
}
final BlockStatement code = (BlockStatement) clinit.getCode();
code.addStatement(
stmt(callX(propX(classX(annotatedClass), "metaClass"), "mixin", useClasses))
);
}
}
}