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/*
* Copyright 2016 Google Inc. All Rights Reserved.
*
* 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.google.turbine.bytecode;
import com.google.common.collect.ImmutableList;
import com.google.common.io.ByteArrayDataOutput;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue.ArrayValue;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue.ConstTurbineAnnotationValue;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue.ConstTurbineClassValue;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue.ConstValue;
import com.google.turbine.bytecode.ClassFile.AnnotationInfo.ElementValue.EnumConstValue;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.FormalParameterTarget;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.SuperTypeTarget;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.Target;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.ThrowsTarget;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.TypeParameterBoundTarget;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.TypeParameterTarget;
import com.google.turbine.bytecode.ClassFile.TypeAnnotationInfo.TypePath;
import com.google.turbine.model.Const.Value;
import java.util.Map;
/** Writes an {@link AnnotationInfo} to a class file. */
public class AnnotationWriter {
final ConstantPool pool;
final ByteArrayDataOutput output;
public AnnotationWriter(ConstantPool pool, ByteArrayDataOutput output) {
this.pool = pool;
this.output = output;
}
public void writeAnnotation(AnnotationInfo annotation) {
output.writeShort(pool.utf8(annotation.typeName()));
output.writeShort(annotation.elementValuePairs().size());
for (Map.Entry<String, ElementValue> entry : annotation.elementValuePairs().entrySet()) {
output.writeShort(pool.utf8(entry.getKey()));
writeElementValue(entry.getValue());
}
}
void writeElementValue(ElementValue value) {
switch (value.kind()) {
case CONST:
writeConstElementValue(((ConstValue) value).value());
break;
case ENUM:
writeEnumElementValue((EnumConstValue) value);
break;
case CLASS:
writeClassElementValue((ConstTurbineClassValue) value);
break;
case ARRAY:
writeArrayElementValue((ArrayValue) value);
break;
case ANNOTATION:
writeAnnotationElementValue((ConstTurbineAnnotationValue) value);
break;
}
}
private void writeConstElementValue(Value value) {
switch (value.constantTypeKind()) {
case BYTE:
writeConst('B', pool.integer(value.asInteger().value()));
break;
case CHAR:
writeConst('C', pool.integer(value.asInteger().value()));
break;
case SHORT:
writeConst('S', pool.integer(value.asInteger().value()));
break;
case DOUBLE:
writeConst('D', pool.doubleInfo(value.asDouble().value()));
break;
case FLOAT:
writeConst('F', pool.floatInfo(value.asFloat().value()));
break;
case INT:
writeConst('I', pool.integer(value.asInteger().value()));
break;
case LONG:
writeConst('J', pool.longInfo(value.asLong().value()));
break;
case STRING:
writeConst('s', pool.utf8(value.asString().value()));
break;
case BOOLEAN:
writeConst('Z', pool.integer(value.asBoolean().value() ? 1 : 0));
break;
default:
throw new AssertionError(value.constantTypeKind());
}
}
private void writeConst(char tag, int index) {
output.writeByte(tag);
output.writeShort(index);
}
private void writeEnumElementValue(EnumConstValue value) {
output.writeByte('e');
output.writeShort(pool.utf8(value.typeName()));
output.writeShort(pool.utf8(value.constName()));
}
private void writeClassElementValue(ConstTurbineClassValue value) {
output.writeByte('c');
output.writeShort(pool.utf8(value.className()));
}
private void writeArrayElementValue(ArrayValue value) {
output.writeByte('[');
output.writeShort(value.elements().size());
for (ElementValue elementValue : value.elements()) {
writeElementValue(elementValue);
}
}
private void writeAnnotationElementValue(ConstTurbineAnnotationValue value) {
output.writeByte('@');
writeAnnotation(value.annotation());
}
public void writeTypeAnnotation(TypeAnnotationInfo annotation) {
output.writeByte(annotation.targetType().tag());
writeTypeAnnotationTarget(annotation.target());
writePath(annotation.path());
writeAnnotation(annotation.anno());
}
private void writePath(TypePath path) {
ImmutableList<TypePath> flat = path.flatten();
output.writeByte(flat.size());
for (TypePath curr : flat) {
output.writeByte(curr.tag());
output.writeByte(curr.typeArgumentIndex());
}
}
private void writeTypeAnnotationTarget(Target target) {
switch (target.kind()) {
case EMPTY:
break;
case TYPE_PARAMETER:
output.writeByte(((TypeParameterTarget) target).index());
break;
case FORMAL_PARAMETER:
output.writeByte(((FormalParameterTarget) target).index());
break;
case THROWS:
output.writeShort(((ThrowsTarget) target).index());
break;
case SUPERTYPE:
output.writeShort(((SuperTypeTarget) target).index());
break;
case TYPE_PARAMETER_BOUND:
TypeParameterBoundTarget typeParameterBoundTarget = (TypeParameterBoundTarget) target;
output.writeByte(typeParameterBoundTarget.typeParameterIndex());
output.writeByte(typeParameterBoundTarget.boundIndex());
break;
}
}
}
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