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/*
* Copyright (C) 2008 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.dexgen.dex.file;
import com.android.dexgen.rop.cst.CstType;
import com.android.dexgen.rop.cst.CstUtf8;
import com.android.dexgen.rop.type.Prototype;
import com.android.dexgen.rop.type.StdTypeList;
import com.android.dexgen.rop.type.Type;
import com.android.dexgen.util.AnnotatedOutput;
import com.android.dexgen.util.Hex;
/**
* Representation of a method prototype reference inside a Dalvik file.
*/
public final class ProtoIdItem extends IndexedItem {
/** size of instances when written out to a file, in bytes */
public static final int WRITE_SIZE = 12;
/** {@code non-null;} the wrapped prototype */
private final Prototype prototype;
/** {@code non-null;} the short-form of the prototype */
private final CstUtf8 shortForm;
/**
* {@code null-ok;} the list of parameter types or {@code null} if this
* prototype has no parameters
*/
private TypeListItem parameterTypes;
/**
* Constructs an instance.
*
* @param prototype {@code non-null;} the constant for the prototype
*/
public ProtoIdItem(Prototype prototype) {
if (prototype == null) {
throw new NullPointerException("prototype == null");
}
this.prototype = prototype;
this.shortForm = makeShortForm(prototype);
StdTypeList parameters = prototype.getParameterTypes();
this.parameterTypes = (parameters.size() == 0) ? null
: new TypeListItem(parameters);
}
/**
* Creates the short-form of the given prototype.
*
* @param prototype {@code non-null;} the prototype
* @return {@code non-null;} the short form
*/
private static CstUtf8 makeShortForm(Prototype prototype) {
StdTypeList parameters = prototype.getParameterTypes();
int size = parameters.size();
StringBuilder sb = new StringBuilder(size + 1);
sb.append(shortFormCharFor(prototype.getReturnType()));
for (int i = 0; i < size; i++) {
sb.append(shortFormCharFor(parameters.getType(i)));
}
return new CstUtf8(sb.toString());
}
/**
* Gets the short-form character for the given type.
*
* @param type {@code non-null;} the type
* @return the corresponding short-form character
*/
private static char shortFormCharFor(Type type) {
char descriptorChar = type.getDescriptor().charAt(0);
if (descriptorChar == '[') {
return 'L';
}
return descriptorChar;
}
/** {@inheritDoc} */
@Override
public ItemType itemType() {
return ItemType.TYPE_PROTO_ID_ITEM;
}
/** {@inheritDoc} */
@Override
public int writeSize() {
return WRITE_SIZE;
}
/** {@inheritDoc} */
@Override
public void addContents(DexFile file) {
StringIdsSection stringIds = file.getStringIds();
TypeIdsSection typeIds = file.getTypeIds();
MixedItemSection typeLists = file.getTypeLists();
typeIds.intern(prototype.getReturnType());
stringIds.intern(shortForm);
if (parameterTypes != null) {
parameterTypes = typeLists.intern(parameterTypes);
}
}
/** {@inheritDoc} */
@Override
public void writeTo(DexFile file, AnnotatedOutput out) {
int shortyIdx = file.getStringIds().indexOf(shortForm);
int returnIdx = file.getTypeIds().indexOf(prototype.getReturnType());
int paramsOff = OffsettedItem.getAbsoluteOffsetOr0(parameterTypes);
if (out.annotates()) {
StringBuilder sb = new StringBuilder();
sb.append(prototype.getReturnType().toHuman());
sb.append(" proto(");
StdTypeList params = prototype.getParameterTypes();
int size = params.size();
for (int i = 0; i < size; i++) {
if (i != 0) {
sb.append(", ");
}
sb.append(params.getType(i).toHuman());
}
sb.append(")");
out.annotate(0, indexString() + ' ' + sb.toString());
out.annotate(4, " shorty_idx: " + Hex.u4(shortyIdx) +
" // " + shortForm.toQuoted());
out.annotate(4, " return_type_idx: " + Hex.u4(returnIdx) +
" // " + prototype.getReturnType().toHuman());
out.annotate(4, " parameters_off: " + Hex.u4(paramsOff));
}
out.writeInt(shortyIdx);
out.writeInt(returnIdx);
out.writeInt(paramsOff);
}
}
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