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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.SizeOf;
import com.android.dx.rop.cst.CstString;
import com.android.dx.util.AnnotatedOutput;
import com.android.dx.util.Hex;
/**
* Representation of a string inside a Dalvik file.
*/
public final class StringIdItem
extends IndexedItem implements Comparable {
/** {@code non-null;} the string value */
private final CstString value;
/** {@code null-ok;} associated string data object, if known */
private StringDataItem data;
/**
* Constructs an instance.
*
* @param value {@code non-null;} the string value
*/
public StringIdItem(CstString value) {
if (value == null) {
throw new NullPointerException("value == null");
}
this.value = value;
this.data = null;
}
/** {@inheritDoc} */
@Override
public boolean equals(Object other) {
if (!(other instanceof StringIdItem)) {
return false;
}
StringIdItem otherString = (StringIdItem) other;
return value.equals(otherString.value);
}
/** {@inheritDoc} */
@Override
public int hashCode() {
return value.hashCode();
}
/** {@inheritDoc} */
public int compareTo(Object other) {
StringIdItem otherString = (StringIdItem) other;
return value.compareTo(otherString.value);
}
/** {@inheritDoc} */
@Override
public ItemType itemType() {
return ItemType.TYPE_STRING_ID_ITEM;
}
/** {@inheritDoc} */
@Override
public int writeSize() {
return SizeOf.STRING_ID_ITEM;
}
/** {@inheritDoc} */
@Override
public void addContents(DexFile file) {
if (data == null) {
// The string data hasn't yet been added, so add it.
MixedItemSection stringData = file.getStringData();
data = new StringDataItem(value);
stringData.add(data);
}
}
/** {@inheritDoc} */
@Override
public void writeTo(DexFile file, AnnotatedOutput out) {
int dataOff = data.getAbsoluteOffset();
if (out.annotates()) {
out.annotate(0, indexString() + ' ' + value.toQuoted(100));
out.annotate(4, " string_data_off: " + Hex.u4(dataOff));
}
out.writeInt(dataOff);
}
/**
* Gets the string value.
*
* @return {@code non-null;} the value
*/
public CstString getValue() {
return value;
}
/**
* Gets the associated data object for this instance, if known.
*
* @return {@code null-ok;} the associated data object or {@code null}
* if not yet known
*/
public StringDataItem getData() {
return data;
}
}
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