| /* |
| * 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.dx.dex.code; |
| |
| import com.android.dx.util.FixedSizeList; |
| |
| /** |
| * Table of catch entries. Each entry includes a range of code |
| * addresses for which it is valid and an associated {@link |
| * CatchHandlerList}. |
| */ |
| public final class CatchTable extends FixedSizeList |
| implements Comparable<CatchTable> { |
| /** {@code non-null;} empty instance */ |
| public static final CatchTable EMPTY = new CatchTable(0); |
| |
| /** |
| * Constructs an instance. All indices initially contain {@code null}. |
| * |
| * @param size {@code >= 0;} the size of the table |
| */ |
| public CatchTable(int size) { |
| super(size); |
| } |
| |
| /** |
| * Gets the element at the given index. It is an error to call |
| * this with the index for an element which was never set; if you |
| * do that, this will throw {@code NullPointerException}. |
| * |
| * @param n {@code >= 0, < size();} which index |
| * @return {@code non-null;} element at that index |
| */ |
| public Entry get(int n) { |
| return (Entry) get0(n); |
| } |
| |
| /** |
| * Sets the entry at the given index. |
| * |
| * @param n {@code >= 0, < size();} which index |
| * @param entry {@code non-null;} the entry to set at {@code n} |
| */ |
| public void set(int n, Entry entry) { |
| set0(n, entry); |
| } |
| |
| /** {@inheritDoc} */ |
| public int compareTo(CatchTable other) { |
| if (this == other) { |
| // Easy out. |
| return 0; |
| } |
| |
| int thisSize = size(); |
| int otherSize = other.size(); |
| int checkSize = Math.min(thisSize, otherSize); |
| |
| for (int i = 0; i < checkSize; i++) { |
| Entry thisEntry = get(i); |
| Entry otherEntry = other.get(i); |
| int compare = thisEntry.compareTo(otherEntry); |
| if (compare != 0) { |
| return compare; |
| } |
| } |
| |
| if (thisSize < otherSize) { |
| return -1; |
| } else if (thisSize > otherSize) { |
| return 1; |
| } |
| |
| return 0; |
| } |
| |
| /** |
| * Entry in a catch list. |
| */ |
| public static class Entry implements Comparable<Entry> { |
| /** {@code >= 0;} start address */ |
| private final int start; |
| |
| /** {@code > start;} end address (exclusive) */ |
| private final int end; |
| |
| /** {@code non-null;} list of catch handlers */ |
| private final CatchHandlerList handlers; |
| |
| /** |
| * Constructs an instance. |
| * |
| * @param start {@code >= 0;} start address |
| * @param end {@code > start;} end address (exclusive) |
| * @param handlers {@code non-null;} list of catch handlers |
| */ |
| public Entry(int start, int end, CatchHandlerList handlers) { |
| if (start < 0) { |
| throw new IllegalArgumentException("start < 0"); |
| } |
| |
| if (end <= start) { |
| throw new IllegalArgumentException("end <= start"); |
| } |
| |
| if (handlers.isMutable()) { |
| throw new IllegalArgumentException("handlers.isMutable()"); |
| } |
| |
| this.start = start; |
| this.end = end; |
| this.handlers = handlers; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int hashCode() { |
| int hash = (start * 31) + end; |
| hash = (hash * 31) + handlers.hashCode(); |
| return hash; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public boolean equals(Object other) { |
| if (other instanceof Entry) { |
| return (compareTo((Entry) other) == 0); |
| } |
| |
| return false; |
| } |
| |
| /** {@inheritDoc} */ |
| public int compareTo(Entry other) { |
| if (start < other.start) { |
| return -1; |
| } else if (start > other.start) { |
| return 1; |
| } |
| |
| if (end < other.end) { |
| return -1; |
| } else if (end > other.end) { |
| return 1; |
| } |
| |
| return handlers.compareTo(other.handlers); |
| } |
| |
| /** |
| * Gets the start address. |
| * |
| * @return {@code >= 0;} the start address |
| */ |
| public int getStart() { |
| return start; |
| } |
| |
| /** |
| * Gets the end address (exclusive). |
| * |
| * @return {@code > start;} the end address (exclusive) |
| */ |
| public int getEnd() { |
| return end; |
| } |
| |
| /** |
| * Gets the handlers. |
| * |
| * @return {@code non-null;} the handlers |
| */ |
| public CatchHandlerList getHandlers() { |
| return handlers; |
| } |
| } |
| } |