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Groovy: A powerful, dynamic language for the JVM
/*
* Copyright 2008-2014 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.GroovyBugError;
import org.codehaus.groovy.ast.ASTNode;
import org.codehaus.groovy.ast.AnnotatedNode;
import org.codehaus.groovy.ast.AnnotationNode;
import org.codehaus.groovy.ast.ClassHelper;
import org.codehaus.groovy.ast.ClassNode;
import org.codehaus.groovy.ast.MethodNode;
import org.codehaus.groovy.ast.expr.ClassExpression;
import org.codehaus.groovy.ast.expr.ConstantExpression;
import org.codehaus.groovy.ast.expr.Expression;
import org.codehaus.groovy.ast.expr.ListExpression;
import org.codehaus.groovy.ast.expr.VariableExpression;
import org.codehaus.groovy.ast.tools.GeneralUtils;
import org.codehaus.groovy.ast.tools.GenericsUtils;
import org.codehaus.groovy.control.SourceUnit;
import org.codehaus.groovy.control.messages.SyntaxErrorMessage;
import org.codehaus.groovy.runtime.StringGroovyMethods;
import org.codehaus.groovy.syntax.SyntaxException;
import org.objectweb.asm.Opcodes;
import java.lang.annotation.Retention;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
public abstract class AbstractASTTransformation implements Opcodes, ASTTransformation {
public static final ClassNode RETENTION_CLASSNODE = ClassHelper.makeWithoutCaching(Retention.class);
protected SourceUnit sourceUnit;
protected void init(ASTNode[] nodes, SourceUnit sourceUnit) {
if (nodes == null || nodes.length != 2 || !(nodes[0] instanceof AnnotationNode) || !(nodes[1] instanceof AnnotatedNode)) {
throw new GroovyBugError("Internal error: expecting [AnnotationNode, AnnotatedNode] but got: " + (nodes == null ? null : Arrays.asList(nodes)));
}
this.sourceUnit = sourceUnit;
}
public boolean memberHasValue(AnnotationNode node, String name, Object value) {
final Expression member = node.getMember(name);
return member != null && member instanceof ConstantExpression && ((ConstantExpression) member).getValue().equals(value);
}
public Object getMemberValue(AnnotationNode node, String name) {
final Expression member = node.getMember(name);
if (member != null && member instanceof ConstantExpression) return ((ConstantExpression) member).getValue();
return null;
}
public String getMemberStringValue(AnnotationNode node, String name, String defaultValue) {
final Expression member = node.getMember(name);
if (member != null && member instanceof ConstantExpression) {
Object result = ((ConstantExpression) member).getValue();
if (result != null) return result.toString();
}
return defaultValue;
}
public String getMemberStringValue(AnnotationNode node, String name) {
return getMemberStringValue(node, name, null);
}
public int getMemberIntValue(AnnotationNode node, String name) {
Object value = getMemberValue(node, name);
if (value != null && value instanceof Integer) {
return (Integer) value;
}
return 0;
}
public ClassNode getMemberClassValue(AnnotationNode node, String name) {
return getMemberClassValue(node, name, null);
}
public ClassNode getMemberClassValue(AnnotationNode node, String name, ClassNode defaultValue) {
final Expression member = node.getMember(name);
if (member != null) {
if (member instanceof ClassExpression)
return member.getType();
if (member instanceof VariableExpression) {
addError("Error expecting to find class value for '" + name + "' but found variable: " + member.getText() + ". Missing import?", node);
return null;
} else if (member instanceof ConstantExpression) {
addError("Error expecting to find class value for '" + name + "' but found constant: " + member.getText() + "!", node);
return null;
}
}
return defaultValue;
}
public List getMemberList(AnnotationNode anno, String name) {
List list;
Expression expr = anno.getMember(name);
if (expr != null && expr instanceof ListExpression) {
list = new ArrayList();
final ListExpression listExpression = (ListExpression) expr;
for (Expression itemExpr : listExpression.getExpressions()) {
if (itemExpr != null && itemExpr instanceof ConstantExpression) {
Object value = ((ConstantExpression) itemExpr).getValue();
if (value != null) list.add(value.toString());
}
}
} else {
list = tokenize(getMemberStringValue(anno, name));
}
return list;
}
public List getClassList(AnnotationNode anno, String name) {
List list = new ArrayList();
Expression expr = anno.getMember(name);
if (expr != null && expr instanceof ListExpression) {
final ListExpression listExpression = (ListExpression) expr;
for (Expression itemExpr : listExpression.getExpressions()) {
if (itemExpr != null && itemExpr instanceof ClassExpression) {
ClassNode cn = itemExpr.getType();
if (cn != null) list.add(cn);
}
}
} else if (expr != null && expr instanceof ClassExpression) {
ClassNode cn = expr.getType();
if (cn != null) list.add(cn);
}
return list;
}
public void addError(String msg, ASTNode expr) {
sourceUnit.getErrorCollector().addErrorAndContinue(new SyntaxErrorMessage(
new SyntaxException(msg + '\n', expr.getLineNumber(), expr.getColumnNumber(),
expr.getLastLineNumber(), expr.getLastColumnNumber()),
sourceUnit)
);
}
protected boolean checkNotInterface(ClassNode cNode, String annotationName) {
if (cNode.isInterface()) {
addError("Error processing interface '" + cNode.getName() + "'. " +
annotationName + " not allowed for interfaces.", cNode);
return false;
}
return true;
}
public boolean hasAnnotation(ClassNode cNode, ClassNode annotation) {
List annots = cNode.getAnnotations(annotation);
return (annots != null && annots.size() > 0);
}
protected List tokenize(String rawExcludes) {
return rawExcludes == null ? new ArrayList() : StringGroovyMethods.tokenize(rawExcludes, ", ");
}
public static boolean deemedInternalName(String name) {
return name.contains("$");
}
public static boolean shouldSkip(String name, List excludes, List includes) {
return (excludes != null && excludes.contains(name)) || deemedInternalName(name) || (includes != null && !includes.isEmpty() && !includes.contains(name));
}
public static boolean shouldSkipOnDescriptor(boolean checkReturn, Map genericsSpec, MethodNode mNode, List excludeTypes, List includeTypes) {
String descriptor = mNode.getTypeDescriptor();
String descriptorNoReturn = GeneralUtils.makeDescriptorWithoutReturnType(mNode);
for (ClassNode cn : excludeTypes) {
List remaining = new LinkedList();
remaining.add(cn);
Map updatedGenericsSpec = new HashMap(genericsSpec);
while (!remaining.isEmpty()) {
ClassNode next = remaining.remove(0);
if (!next.equals(ClassHelper.OBJECT_TYPE)) {
updatedGenericsSpec = GenericsUtils.createGenericsSpec(next, updatedGenericsSpec);
for (MethodNode mn : next.getMethods()) {
MethodNode correctedMethodNode = GenericsUtils.correctToGenericsSpec(updatedGenericsSpec, mn);
if (checkReturn) {
String md = correctedMethodNode.getTypeDescriptor();
if (md.equals(descriptor)) return true;
} else {
String md = GeneralUtils.makeDescriptorWithoutReturnType(correctedMethodNode);
if (md.equals(descriptorNoReturn)) return true;
}
}
remaining.addAll(Arrays.asList(next.getInterfaces()));
}
}
}
if (includeTypes.isEmpty()) return false;
for (ClassNode cn : includeTypes) {
List remaining = new LinkedList();
remaining.add(cn);
Map updatedGenericsSpec = new HashMap(genericsSpec);
while (!remaining.isEmpty()) {
ClassNode next = remaining.remove(0);
if (!next.equals(ClassHelper.OBJECT_TYPE)) {
updatedGenericsSpec = GenericsUtils.createGenericsSpec(next, updatedGenericsSpec);
for (MethodNode mn : next.getMethods()) {
MethodNode correctedMethodNode = GenericsUtils.correctToGenericsSpec(updatedGenericsSpec, mn);
if (checkReturn) {
String md = correctedMethodNode.getTypeDescriptor();
if (md.equals(descriptor)) return false;
} else {
String md = GeneralUtils.makeDescriptorWithoutReturnType(correctedMethodNode);
if (md.equals(descriptorNoReturn)) return false;
}
}
remaining.addAll(Arrays.asList(next.getInterfaces()));
}
}
}
return true;
}
protected boolean checkIncludeExclude(AnnotationNode node, List excludes, List includes, String typeName) {
if (includes != null && !includes.isEmpty() && excludes != null && !excludes.isEmpty()) {
addError("Error during " + typeName + " processing: Only one of 'includes' and 'excludes' should be supplied not both.", node);
return false;
}
return true;
}
protected void checkIncludeExclude(AnnotationNode node, List excludes, List includes, List excludeTypes, List includeTypes, String typeName) {
int found = 0;
if (includes != null && !includes.isEmpty()) found++;
if (excludes != null && !excludes.isEmpty()) found++;
if (includeTypes != null && !includeTypes.isEmpty()) found++;
if (excludeTypes != null && !excludeTypes.isEmpty()) found++;
if (found > 1) {
addError("Error during " + typeName + " processing: Only one of 'includes', 'excludes', 'includeTypes' and 'excludeTypes' should be supplied.", node);
}
}
/**
* @deprecated use GenericsUtils#nonGeneric
*/
@Deprecated
public static ClassNode nonGeneric(ClassNode type) {
return GenericsUtils.nonGeneric(type);
}
}