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/*
* Copyright (C) 2013 The Android Open Source Project
*
* 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 com.android.jill.frontend.java;
import com.android.jill.JillException;
import com.android.jill.backend.jayce.JayceWriter;
import com.android.jill.backend.jayce.Token;
import org.objectweb.asm.Type;
import org.objectweb.asm.tree.AnnotationNode;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.FieldNode;
import org.objectweb.asm.tree.MethodNode;
import java.io.IOException;
import java.lang.annotation.Retention;
import java.util.List;
import javax.annotation.CheckForNull;
import javax.annotation.Nonnegative;
import javax.annotation.Nonnull;
/**
* Annotation transformer to Jayce.
*/
public class AnnotationWriter extends JillWriter {
private static final String JAVA_LANG_SYNTHETIC = "Ljava/lang/Synthetic;";
public AnnotationWriter(@Nonnull JayceWriter writer,
@Nonnull SourceInfoWriter sourceInfoWriter) {
super(writer, sourceInfoWriter);
}
public void writeRetentionPolicy(@Nonnull ClassNode cn) throws IOException {
assert AsmHelper.isAnnotation(cn);
boolean retentionAnnotationFound = false;
if (cn.visibleAnnotations != null) {
for (AnnotationNode anno : cn.visibleAnnotations) {
// Into Jayce, retention policy is written as a token
if (anno.desc.equals(Type.getType(Retention.class).getDescriptor())) {
assert anno.values.size() == 2;
assert anno.values.get(0) instanceof String;
assert ((String) anno.values.get(0)).equals("value");
assert anno.values.get(1) instanceof String[];
retentionAnnotationFound = true;
String[] enumAccess = (String[]) anno.values.get(1);
assert enumAccess.length == 2;
assert enumAccess[0].equals(Type.getType(java.lang.annotation.RetentionPolicy.class)
.getDescriptor());
if (enumAccess[1].equals(RetentionPolicy.CLASS.toString())) {
writer.writeRetentionPolicyEnum(RetentionPolicy.CLASS);
} else if (enumAccess[1].equals(RetentionPolicy.SOURCE.toString())) {
writer.writeRetentionPolicyEnum(RetentionPolicy.SOURCE);
} else if (enumAccess[1].equals(RetentionPolicy.RUNTIME.toString())) {
writer.writeRetentionPolicyEnum(RetentionPolicy.RUNTIME);
} else {
throw new JillException("Unknown retention policy.");
}
break;
}
}
}
if (!retentionAnnotationFound) {
// Default retention policy as specify in java doc of Annotation Type Retention.
writer.writeRetentionPolicyEnum(RetentionPolicy.CLASS);
}
}
public void writeAnnotations(@Nonnull ClassNode cn) throws IOException {
writer.writeOpenNodeList();
writeAnnotations(cn.invisibleAnnotations, RetentionPolicy.CLASS);
writeAnnotations(cn.visibleAnnotations, RetentionPolicy.RUNTIME);
writer.writeCloseNodeList();
}
public void writeAnnotations(@Nonnull MethodNode mn) throws IOException {
writer.writeOpenNodeList();
writeAnnotations(mn.invisibleAnnotations, RetentionPolicy.CLASS);
writeAnnotations(mn.visibleAnnotations, RetentionPolicy.RUNTIME);
writer.writeCloseNodeList();
}
public void writeAnnotations(@Nonnull FieldNode fn) throws IOException {
writer.writeOpenNodeList();
writeAnnotations(fn.invisibleAnnotations, RetentionPolicy.CLASS);
writeAnnotations(fn.visibleAnnotations, RetentionPolicy.RUNTIME);
writer.writeCloseNodeList();
}
public void writeAnnotations(@Nonnull MethodNode mn, @Nonnegative int parameterAnnotIdx)
throws IOException {
writer.writeOpenNodeList();
if (mn.invisibleParameterAnnotations != null) {
writeAnnotations(mn.invisibleParameterAnnotations[parameterAnnotIdx], RetentionPolicy.CLASS);
}
if (mn.visibleParameterAnnotations != null) {
writeAnnotations(mn.visibleParameterAnnotations[parameterAnnotIdx], RetentionPolicy.RUNTIME);
}
writer.writeCloseNodeList();
}
@Override
public void writeValue(Object value) throws IOException {
if (value instanceof String) {
writeValue((String) value);
} else if (value instanceof Integer) {
writeValue(((Integer) value).intValue());
} else if (value instanceof Boolean) {
writeValue(((Boolean) value).booleanValue());
} else if (value instanceof Byte) {
writeValue(((Byte) value).byteValue());
} else if (value instanceof Character) {
writeValue(((Character) value).charValue());
} else if (value instanceof Short) {
writeValue(((Short) value).shortValue());
} else if (value instanceof Float) {
writeValue(((Float) value).floatValue());
} else if (value instanceof Double) {
writeValue(((Double) value).doubleValue());
} else if (value instanceof Long) {
writeValue(((Long) value).longValue());
} else if (value instanceof String[]) {
writeValue((String[]) value);
} else if (value == null) {
writeValue();
} else if (value instanceof Type) {
writeValue((Type) value);
} else if (value.getClass().isArray() && value.getClass().getComponentType().isPrimitive()) {
writeValue(convertPrimitiveArrayToObject(value));
} else if (value instanceof List) {
writeValue(((List<?>) value).toArray());
} else if (value instanceof AnnotationNode) {
AnnotationNode annotationNode = (AnnotationNode) value;
assert !JAVA_LANG_SYNTHETIC.equals(annotationNode.desc);
writeAnnotation(annotationNode, RetentionPolicy.UNKNOWN);
} else {
throw new JillException("Not yet supported.");
}
}
private void writeAnnotations(@CheckForNull List<AnnotationNode> annotations,
@Nonnull RetentionPolicy retentionPolicy) throws IOException {
if (annotations != null) {
for (AnnotationNode anno : annotations) {
if (!JAVA_LANG_SYNTHETIC.equals(anno.desc)) {
writeAnnotation(anno, retentionPolicy);
}
}
}
}
private void writeAnnotation(@Nonnull AnnotationNode anno,
@Nonnull RetentionPolicy retentionPolicy) throws IOException {
sourceInfoWriter.writeUnknwonDebugBegin();
writer.writeKeyword(Token.ANNOTATION_LITERAL);
writer.writeOpen();
writer.writeRetentionPolicyEnum(retentionPolicy);
writer.writeId(anno.desc);
writeNameValuePair(anno.values);
sourceInfoWriter.writeUnknownDebugEnd();
writer.writeClose();
}
private void writeNameValuePair(@CheckForNull List<Object> values) throws IOException {
writer.writeOpenNodeList();
if (values != null) {
for (int i = 0; i < values.size(); i += 2) {
String name = (String) values.get(i);
Object value = values.get(i + 1);
sourceInfoWriter.writeUnknwonDebugBegin();
writer.writeKeyword(Token.NAME_VALUE_PAIR);
writer.writeOpen();
writer.writeString(name);
writeValue(value);
sourceInfoWriter.writeUnknownDebugEnd();
writer.writeClose();
}
}
writer.writeCloseNodeList();
}
private void writeValue(@Nonnull String[] value) throws IOException {
sourceInfoWriter.writeUnknwonDebugBegin();
writer.writeKeyword(Token.ENUM_LITERAL);
writer.writeOpen();
writer.writeId(value[0]);
writer.writeString(value[1]);
sourceInfoWriter.writeUnknownDebugEnd();
writer.writeClose();
}
}
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