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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2003-2009 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 groovy.grape;
import groovy.lang.Grab;
import groovy.lang.Grapes;
import org.codehaus.groovy.ast.*;
import org.codehaus.groovy.ast.expr.*;
import org.codehaus.groovy.ast.stmt.ExpressionStatement;
import org.codehaus.groovy.control.CompilePhase;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.transform.ASTTransformation;
import org.codehaus.groovy.transform.GroovyASTTransformation;
import java.util.*;
/**
* Created by IntelliJ IDEA.
* User: Danno
* Date: Jan 18, 2008
* Time: 9:48:57 PM
*/
@GroovyASTTransformation(phase=CompilePhase.CONVERSION)
public class GrabAnnotationTransformation extends ClassCodeVisitorSupport implements ASTTransformation {
private static final String GRAB_CLASS_NAME = Grab.class.getName();
private static final String GRAB_DOT_NAME = GRAB_CLASS_NAME.substring(GRAB_CLASS_NAME.lastIndexOf("."));
private static final String GRAB_SHORT_NAME = GRAB_DOT_NAME.substring(1);
private static final String GRAPES_CLASS_NAME = Grapes.class.getName();
private static final String GRAPES_DOT_NAME = GRAPES_CLASS_NAME.substring(GRAPES_CLASS_NAME.lastIndexOf("."));
private static final String GRAPES_SHORT_NAME = GRAPES_DOT_NAME.substring(1);
boolean allowShortGrab;
Set grabAliases;
List grabAnnotations;
boolean allowShortGrapes;
Set grapesAliases;
List grapesAnnotations;
SourceUnit sourceUnit;
public SourceUnit getSourceUnit() {
return sourceUnit;
}
public void visit(ASTNode[] nodes, SourceUnit source) {
sourceUnit = source;
ModuleNode mn = (ModuleNode) nodes[0];
allowShortGrab = true;
allowShortGrapes = true;
grabAliases = new HashSet();
grapesAliases = new HashSet();
for (ImportNode im : (Collection) mn.getImports()) {
String alias = im.getAlias();
String className = im.getClassName();
if ((className.endsWith(GRAB_DOT_NAME) && ((alias == null) || (alias.length() == 0)))
|| (GRAB_CLASS_NAME.equals(alias)))
{
allowShortGrab = false;
} else if (GRAB_CLASS_NAME.equals(className)) {
grabAliases.add(im.getAlias());
}
if ((className.endsWith(GRAPES_DOT_NAME) && ((alias == null) || (alias.length() == 0)))
|| (GRAPES_CLASS_NAME.equals(alias)))
{
allowShortGrapes = false;
} else if (GRAPES_CLASS_NAME.equals(className)) {
grapesAliases.add(im.getAlias());
}
}
List> grabMaps = new ArrayList();
for (ClassNode classNode : (Collection) sourceUnit.getAST().getClasses()) {
grabAnnotations = new ArrayList();
grapesAnnotations = new ArrayList();
visitClass(classNode);
ClassNode grapeClassNode = new ClassNode(Grape.class);
if (!grapesAnnotations.isEmpty()) {
for (AnnotationNode node : grapesAnnotations) {
Expression init = node.getMember("initClass");
Expression value = node.getMember("value");
if (value instanceof ListExpression) {
for (Object o : ((ListExpression)value).getExpressions()) {
if (o instanceof AnnotationConstantExpression) {
if (((AnnotationConstantExpression)o).getValue() instanceof AnnotationNode) {
AnnotationNode annotation = (AnnotationNode) ((AnnotationConstantExpression)o).getValue();
if ((init != null) && (annotation.getMember("initClass") != null)) {
annotation.setMember("initClass", init);
}
String name = annotation.getClassNode().getName();
if ((GRAB_CLASS_NAME.equals(name))
|| (allowShortGrab && GRAB_SHORT_NAME.equals(name))
|| (grabAliases.contains(name)))
{
grabAnnotations.add(annotation);
}
}
}
}
}
// don't worry if it's not a ListExpression, or AnnotationConstant, etc.
// the rest of GroovyC will flag it as a syntax error later, so we don't
// need to raise the error ourselves
}
}
if (!grabAnnotations.isEmpty()) {
grabAnnotationLoop:
for (AnnotationNode node : grabAnnotations) {
Map grabMap = new HashMap();
for (String s : new String[]{"group", "module", "version"}) {
if (node.getMember(s) == null) {
addError("The missing attribute \"" + s + "\" is required in @" + node.getClassNode().getNameWithoutPackage() + " annotations", node);
continue grabAnnotationLoop;
}
}
grabMap.put("group", ((ConstantExpression)node.getMember("group")).getValue());
grabMap.put("module", ((ConstantExpression)node.getMember("module")).getValue());
grabMap.put("version", ((ConstantExpression)node.getMember("version")).getValue());
if (node.getMember("classifier") != null)
grabMap.put("classifier", ((ConstantExpression)node.getMember("classifier")).getValue());
grabMaps.add(grabMap);
if ((node.getMember("initClass") == null)
|| (node.getMember("initClass") == ConstantExpression.TRUE))
{
List grabInitializers = new ArrayList();
// add Grape.grab([group:group, module:module, version:version, classifier:classifier])
MapExpression me = new MapExpression();
me.addMapEntryExpression(new ConstantExpression("group"),node.getMember("group"));
me.addMapEntryExpression(new ConstantExpression("module"),node.getMember("module"));
me.addMapEntryExpression(new ConstantExpression("version"),node.getMember("version"));
if (node.getMember("classifier") != null)
me.addMapEntryExpression(new ConstantExpression("classifier"),node.getMember("classifier"));
grabInitializers.add(new ExpressionStatement(
new StaticMethodCallExpression(
grapeClassNode,
"grab",
new ArgumentListExpression(me))));
// insert at beginning so we have the classloader set up before the class is called
classNode.addStaticInitializerStatements(grabInitializers, true);
}
}
}
}
if (!grabMaps.isEmpty()) {
Map basicArgs = new HashMap();
basicArgs.put("classLoader", sourceUnit.getClassLoader());
try {
Grape.grab(basicArgs, grabMaps.toArray(new Map[grabMaps.size()]));
} catch (RuntimeException re) {
// Decided against syntax exception since this is not a syntax error.
// The down side is we lose line number information fo the offending
// @Grab annotation.
source.addException(re);
}
}
}
protected void visitConstructorOrMethod(MethodNode node, boolean isConstructor) {
super.visitConstructorOrMethod(node, isConstructor);
// this should be pushed into the super class...
for (Parameter param : node.getParameters()) {
visitAnnotations(param);
}
}
/**
* Adds the annotation to the internal target list if a match is found
* @param node
*/
public void visitAnnotations(AnnotatedNode node) {
super.visitAnnotations(node);
for (AnnotationNode an : (Collection) node.getAnnotations()) {
String name = an.getClassNode().getName();
if ((GRAB_CLASS_NAME.equals(name))
|| (allowShortGrab && GRAB_SHORT_NAME.equals(name))
|| (grabAliases.contains(name)))
{
grabAnnotations.add(an);
}
if ((GRAPES_CLASS_NAME.equals(name))
|| (allowShortGrapes && GRAPES_SHORT_NAME.equals(name))
|| (grapesAliases.contains(name)))
{
grapesAnnotations.add(an);
}
}
}
}