| /* |
| * 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.dx.rop.cst.Constant; |
| import com.android.dx.rop.cst.CstFieldRef; |
| import com.android.dx.util.AnnotatedOutput; |
| import com.android.dx.util.Hex; |
| |
| import java.util.Collection; |
| import java.util.TreeMap; |
| |
| /** |
| * Field refs list section of a <code>.dex</code> file. |
| */ |
| public final class FieldIdsSection extends MemberIdsSection { |
| /** |
| * non-null; map from field constants to {@link |
| * FieldIdItem} instances |
| */ |
| private final TreeMap<CstFieldRef, FieldIdItem> fieldIds; |
| |
| /** |
| * Constructs an instance. The file offset is initially unknown. |
| * |
| * @param file non-null; file that this instance is part of |
| */ |
| public FieldIdsSection(DexFile file) { |
| super("field_ids", file); |
| |
| fieldIds = new TreeMap<CstFieldRef, FieldIdItem>(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public Collection<? extends Item> items() { |
| return fieldIds.values(); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public IndexedItem get(Constant cst) { |
| if (cst == null) { |
| throw new NullPointerException("cst == null"); |
| } |
| |
| throwIfNotPrepared(); |
| |
| IndexedItem result = fieldIds.get((CstFieldRef) cst); |
| |
| if (result == null) { |
| throw new IllegalArgumentException("not found"); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Writes the portion of the file header that refers to this instance. |
| * |
| * @param out non-null; where to write |
| */ |
| public void writeHeaderPart(AnnotatedOutput out) { |
| throwIfNotPrepared(); |
| |
| int sz = fieldIds.size(); |
| int offset = (sz == 0) ? 0 : getFileOffset(); |
| |
| if (out.annotates()) { |
| out.annotate(4, "field_ids_size: " + Hex.u4(sz)); |
| out.annotate(4, "field_ids_off: " + Hex.u4(offset)); |
| } |
| |
| out.writeInt(sz); |
| out.writeInt(offset); |
| } |
| |
| /** |
| * Interns an element into this instance. |
| * |
| * @param field non-null; the reference to intern |
| * @return non-null; the interned reference |
| */ |
| public FieldIdItem intern(CstFieldRef field) { |
| if (field == null) { |
| throw new NullPointerException("field == null"); |
| } |
| |
| throwIfPrepared(); |
| |
| FieldIdItem result = fieldIds.get(field); |
| |
| if (result == null) { |
| result = new FieldIdItem(field); |
| fieldIds.put(field, result); |
| } |
| |
| return result; |
| } |
| |
| /** |
| * Gets the index of the given reference, which must have been added |
| * to this instance. |
| * |
| * @param ref non-null; the reference to look up |
| * @return >= 0; the reference's index |
| */ |
| public int indexOf(CstFieldRef ref) { |
| if (ref == null) { |
| throw new NullPointerException("ref == null"); |
| } |
| |
| throwIfNotPrepared(); |
| |
| FieldIdItem item = fieldIds.get(ref); |
| |
| if (item == null) { |
| throw new IllegalArgumentException("not found"); |
| } |
| |
| return item.getIndex(); |
| } |
| } |