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/*
* Copyright (C) 2007 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.dx.dex.file;
import com.android.dex.DexException;
import com.android.dex.DexFormat;
import com.android.dex.DexIndexOverflowException;
import com.android.dx.command.dexer.Main;
import com.android.dx.rop.cst.Constant;
import com.android.dx.rop.cst.CstType;
import com.android.dx.rop.type.Type;
import com.android.dx.util.AnnotatedOutput;
import com.android.dx.util.Hex;
import java.util.Collection;
import java.util.TreeMap;
/**
* Type identifiers list section of a {@code .dex} file.
*/
public final class TypeIdsSection extends UniformItemSection {
/**
* {@code non-null;} map from types to {@link TypeIdItem} instances
*/
private final TreeMap<Type, TypeIdItem> typeIds;
/**
* Constructs an instance. The file offset is initially unknown.
*
* @param file {@code non-null;} file that this instance is part of
*/
public TypeIdsSection(DexFile file) {
super("type_ids", file, 4);
typeIds = new TreeMap<Type, TypeIdItem>();
}
/** {@inheritDoc} */
@Override
public Collection<? extends Item> items() {
return typeIds.values();
}
/** {@inheritDoc} */
@Override
public IndexedItem get(Constant cst) {
if (cst == null) {
throw new NullPointerException("cst == null");
}
throwIfNotPrepared();
Type type = ((CstType) cst).getClassType();
IndexedItem result = typeIds.get(type);
if (result == null) {
throw new IllegalArgumentException("not found: " + cst);
}
return result;
}
/**
* Writes the portion of the file header that refers to this instance.
*
* @param out {@code non-null;} where to write
*/
public void writeHeaderPart(AnnotatedOutput out) {
throwIfNotPrepared();
int sz = typeIds.size();
int offset = (sz == 0) ? 0 : getFileOffset();
if (sz > DexFormat.MAX_TYPE_IDX + 1) {
throw new DexIndexOverflowException("Too many type references: " + sz +
"; max is " + (DexFormat.MAX_TYPE_IDX + 1) + ".\n" +
Main.getTooManyIdsErrorMessage());
}
if (out.annotates()) {
out.annotate(4, "type_ids_size: " + Hex.u4(sz));
out.annotate(4, "type_ids_off: " + Hex.u4(offset));
}
out.writeInt(sz);
out.writeInt(offset);
}
/**
* Interns an element into this instance.
*
* @param type {@code non-null;} the type to intern
* @return {@code non-null;} the interned reference
*/
public synchronized TypeIdItem intern(Type type) {
if (type == null) {
throw new NullPointerException("type == null");
}
throwIfPrepared();
TypeIdItem result = typeIds.get(type);
if (result == null) {
result = new TypeIdItem(new CstType(type));
typeIds.put(type, result);
}
return result;
}
/**
* Interns an element into this instance.
*
* @param type {@code non-null;} the type to intern
* @return {@code non-null;} the interned reference
*/
public synchronized TypeIdItem intern(CstType type) {
if (type == null) {
throw new NullPointerException("type == null");
}
throwIfPrepared();
Type typePerSe = type.getClassType();
TypeIdItem result = typeIds.get(typePerSe);
if (result == null) {
result = new TypeIdItem(type);
typeIds.put(typePerSe, result);
}
return result;
}
/**
* Gets the index of the given type, which must have
* been added to this instance.
*
* @param type {@code non-null;} the type to look up
* @return {@code >= 0;} the reference's index
*/
public int indexOf(Type type) {
if (type == null) {
throw new NullPointerException("type == null");
}
throwIfNotPrepared();
TypeIdItem item = typeIds.get(type);
if (item == null) {
throw new IllegalArgumentException("not found: " + type);
}
return item.getIndex();
}
/**
* Gets the index of the given type, which must have
* been added to this instance.
*
* @param type {@code non-null;} the type to look up
* @return {@code >= 0;} the reference's index
*/
public int indexOf(CstType type) {
if (type == null) {
throw new NullPointerException("type == null");
}
return indexOf(type.getClassType());
}
/** {@inheritDoc} */
@Override
protected void orderItems() {
int idx = 0;
for (Object i : items()) {
((TypeIdItem) i).setIndex(idx);
idx++;
}
}
}
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