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/*
* 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.file;
import com.android.dx.rop.annotation.Annotations;
import com.android.dx.rop.annotation.Annotation;
import com.android.dx.util.AnnotatedOutput;
import com.android.dx.util.Hex;
/**
* Set of annotations, where no annotation type appears more than once.
*/
public final class AnnotationSetItem extends OffsettedItem {
/** the required alignment for instances of this class */
private static final int ALIGNMENT = 4;
/** the size of an entry int the set: one {@code uint} */
private static final int ENTRY_WRITE_SIZE = 4;
/** {@code non-null;} the set of annotations */
private final Annotations annotations;
/**
* {@code non-null;} set of annotations as individual items in an array.
* <b>Note:</b> The contents have to get sorted by type id before
* writing.
*/
private final AnnotationItem[] items;
/**
* Constructs an instance.
*
* @param annotations {@code non-null;} set of annotations
*/
public AnnotationSetItem(Annotations annotations) {
super(ALIGNMENT, writeSize(annotations));
this.annotations = annotations;
this.items = new AnnotationItem[annotations.size()];
int at = 0;
for (Annotation a : annotations.getAnnotations()) {
items[at] = new AnnotationItem(a);
at++;
}
}
/**
* Gets the write size for the given set.
*
* @param annotations {@code non-null;} the set
* @return {@code > 0;} the write size
*/
private static int writeSize(Annotations annotations) {
// This includes an int size at the start of the list.
try {
return (annotations.size() * ENTRY_WRITE_SIZE) + 4;
} catch (NullPointerException ex) {
// Elucidate the exception.
throw new NullPointerException("list == null");
}
}
/**
* Gets the underlying annotations of this instance
*
* @return {@code non-null;} the annotations
*/
public Annotations getAnnotations() {
return annotations;
}
/** {@inheritDoc} */
@Override
public int hashCode() {
return annotations.hashCode();
}
/** {@inheritDoc} */
@Override
protected int compareTo0(OffsettedItem other) {
AnnotationSetItem otherSet = (AnnotationSetItem) other;
return annotations.compareTo(otherSet.annotations);
}
/** {@inheritDoc} */
@Override
public ItemType itemType() {
return ItemType.TYPE_ANNOTATION_SET_ITEM;
}
/** {@inheritDoc} */
@Override
public String toHuman() {
return annotations.toString();
}
/** {@inheritDoc} */
public void addContents(DexFile file) {
MixedItemSection byteData = file.getByteData();
int size = items.length;
for (int i = 0; i < size; i++) {
items[i] = byteData.intern(items[i]);
}
}
/** {@inheritDoc} */
@Override
protected void place0(Section addedTo, int offset) {
// Sort the array to be in type id index order.
AnnotationItem.sortByTypeIdIndex(items);
}
/** {@inheritDoc} */
@Override
protected void writeTo0(DexFile file, AnnotatedOutput out) {
boolean annotates = out.annotates();
int size = items.length;
if (annotates) {
out.annotate(0, offsetString() + " annotation set");
out.annotate(4, " size: " + Hex.u4(size));
}
out.writeInt(size);
for (int i = 0; i < size; i++) {
AnnotationItem item = items[i];
int offset = item.getAbsoluteOffset();
if (annotates) {
out.annotate(4, " entries[" + Integer.toHexString(i) + "]: " +
Hex.u4(offset));
items[i].annotateTo(out, " ");
}
out.writeInt(offset);
}
}
}
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