| /* |
| * [The "BSD licence"] |
| * Copyright (c) 2010 Ben Gruver (JesusFreke) |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.jf.dexlib; |
| |
| import org.jf.dexlib.Util.AnnotatedOutput; |
| import org.jf.dexlib.Util.Input; |
| import org.jf.dexlib.Util.Utf8Utils; |
| |
| import javax.annotation.Nullable; |
| |
| public class StringIdItem extends Item<StringIdItem> { |
| private StringDataItem stringDataItem; |
| |
| /** |
| * Creates a new uninitialized <code>StringIdItem</code> |
| * @param dexFile The <code>DexFile</code> that this item belongs to |
| */ |
| protected StringIdItem(DexFile dexFile) { |
| super(dexFile); |
| } |
| |
| /** |
| * Creates a new <code>StringIdItem</code> for the given <code>StringDataItem</code> |
| * @param dexFile The <code>DexFile</code> that this item belongs to |
| * @param stringDataItem The <code>StringDataItem</code> that this <code>StringIdItem</code> represents |
| */ |
| protected StringIdItem(DexFile dexFile, StringDataItem stringDataItem) { |
| super(dexFile); |
| this.stringDataItem = stringDataItem; |
| } |
| |
| /** |
| * Returns a <code>StringIdItem</code> for the given values, and that has been interned into |
| * the given <code>DexFile</code> |
| * @param dexFile The <code>DexFile</code> that this item will belong to |
| * @param stringValue The string value that this item represents |
| * @return a <code>StringIdItem</code> for the given values, and that has been interned into |
| * the given <code>DexFile</code> |
| */ |
| public static StringIdItem internStringIdItem(DexFile dexFile, String stringValue) { |
| StringDataItem stringDataItem = StringDataItem.internStringDataItem(dexFile, stringValue); |
| if (stringDataItem == null) { |
| return null; |
| } |
| StringIdItem stringIdItem = new StringIdItem(dexFile, stringDataItem); |
| return dexFile.StringIdsSection.intern(stringIdItem); |
| } |
| |
| /** |
| * Looks up the <code>StringIdItem</code> from the given <code>DexFile</code> for the given |
| * string value |
| * @param dexFile the <code>Dexfile</code> to find the string value in |
| * @param stringValue The string value to look up |
| * @return a <code>StringIdItem</code> from the given <code>DexFile</code> for the given |
| * string value, or null if it doesn't exist |
| */ |
| public static StringIdItem lookupStringIdItem(DexFile dexFile, String stringValue) { |
| StringDataItem stringDataItem = StringDataItem.lookupStringDataItem(dexFile, stringValue); |
| if (stringDataItem == null) { |
| return null; |
| } |
| StringIdItem stringIdItem = new StringIdItem(dexFile, stringDataItem); |
| return dexFile.StringIdsSection.getInternedItem(stringIdItem); |
| } |
| |
| /** {@inheritDoc} */ |
| protected void readItem(Input in, ReadContext readContext) { |
| int stringDataOffset = in.readInt(); |
| |
| stringDataItem = (StringDataItem)readContext.getOffsettedItemByOffset(ItemType.TYPE_STRING_DATA_ITEM, |
| stringDataOffset); |
| } |
| |
| /** {@inheritDoc} */ |
| protected int placeItem(int offset) { |
| return offset + 4; |
| } |
| |
| /** {@inheritDoc} */ |
| protected void writeItem(AnnotatedOutput out) { |
| if (out.annotates()) { |
| out.annotate(4, stringDataItem.getConciseIdentity()); |
| } |
| |
| out.writeInt(stringDataItem.getOffset()); |
| } |
| |
| /** {@inheritDoc} */ |
| public ItemType getItemType() { |
| return ItemType.TYPE_STRING_ID_ITEM; |
| } |
| |
| /** {@inheritDoc} */ |
| public String getConciseIdentity() { |
| return "string_id_item: " + Utf8Utils.escapeString(getStringValue()); |
| } |
| |
| /** {@inheritDoc} */ |
| public int compareTo(StringIdItem o) { |
| //sort by the string value |
| return getStringValue().compareTo(o.getStringValue()); |
| } |
| |
| /** |
| * Get the <code>String</code> value that this <code>StringIdItem</code> represents |
| * @return the <code>String</code> value that this <code>StringIdItem</code> represents |
| */ |
| public String getStringValue() { |
| return stringDataItem.getStringValue(); |
| } |
| |
| /** |
| * Get the <code>String</code> value that the given <code>StringIdItem</code> represents |
| * @param stringIdItem The <code>StringIdItem</code> to get the string value of |
| * @return the <code>String</code> value that the given <code>StringIdItem</code> represents |
| */ |
| @Nullable |
| public static String getStringValue(@Nullable StringIdItem stringIdItem) { |
| return stringIdItem==null?null:stringIdItem.getStringValue(); |
| } |
| |
| /** |
| * Get the <code>StringDataItem</code> that this <code>StringIdItem</code> references |
| * @return the <code>StringDataItem</code> that this <code>StringIdItem</code> references |
| */ |
| public StringDataItem getStringDataItem() { |
| return stringDataItem; |
| } |
| |
| @Override |
| public int hashCode() { |
| return stringDataItem.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this==o) { |
| return true; |
| } |
| if (o==null || !this.getClass().equals(o.getClass())) { |
| return false; |
| } |
| |
| //This assumes that the referenced items have been interned in both objects. |
| //This is a valid assumption because all outside code must use the static |
| //"getInterned..." style methods to make new items, and any item created |
| //internally is guaranteed to be interned |
| StringIdItem other = (StringIdItem)o; |
| return stringDataItem == other.stringDataItem; |
| } |
| } |