implement sparse type entry

src/main/java/com/reandroid/arsc/array/SparseTypeBlockArray.java

@@ -0,0 +1,39 @@
+ /*
+  *  Copyright (C) 2022 github.com/REAndroid
+  *
+  *  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.reandroid.arsc.array;
+
+import com.reandroid.arsc.base.BlockArray;
+import com.reandroid.arsc.chunk.SparseTypeBlock;
+
+public class SparseTypeBlockArray extends BlockArray<SparseTypeBlock> {
+    @Override
+    public SparseTypeBlock[] newInstance(int len) {
+        return new SparseTypeBlock[len];
+    }
+    @Override
+    public SparseTypeBlock newInstance() {
+        return new SparseTypeBlock();
+    }
+    @Override
+    protected void onRefreshed() {
+    }
+    public void merge(SparseTypeBlockArray sparse){
+        if(sparse == null || sparse == this){
+            return;
+        }
+        addAll(sparse.getChildes());
+    }
+}

src/main/java/com/reandroid/arsc/array/SparseTypeEntryArray.java

@@ -0,0 +1,42 @@
+ /*
+  *  Copyright (C) 2022 github.com/REAndroid
+  *
+  *  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.reandroid.arsc.array;
+
+import com.reandroid.arsc.base.BlockArray;
+import com.reandroid.arsc.io.BlockReader;
+import com.reandroid.arsc.value.SparseTypeEntry;
+
+import java.io.IOException;
+
+public class SparseTypeEntryArray extends BlockArray<SparseTypeEntry> {
+    @Override
+    public SparseTypeEntry[] newInstance(int len) {
+        return new SparseTypeEntry[len];
+    }
+    @Override
+    public SparseTypeEntry newInstance() {
+        return new SparseTypeEntry();
+    }
+    @Override
+    protected void onRefreshed() {
+    }
+    @Override
+    public void onReadBytes(BlockReader reader) throws IOException {
+        int count = reader.available() / 4;
+        setChildesCount(count);
+        super.onReadBytes(reader);
+    }
+}

src/main/java/com/reandroid/arsc/chunk/SparseTypeBlock.java

@@ -0,0 +1,42 @@
+ /*
+  *  Copyright (C) 2022 github.com/REAndroid
+  *
+  *  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.reandroid.arsc.chunk;
+
+import com.reandroid.arsc.array.SparseTypeEntryArray;
+import com.reandroid.arsc.header.TypeHeader;
+import com.reandroid.arsc.value.SparseTypeEntry;
+
+import java.util.Collection;
+
+public class SparseTypeBlock extends Chunk<TypeHeader>{
+    private final SparseTypeEntryArray entryArray;
+    public SparseTypeBlock() {
+        super(new TypeHeader(), 1);
+        entryArray = new SparseTypeEntryArray();
+        addChild(entryArray);
+        getHeaderBlock().setSparse(true);
+    }
+    public Collection<SparseTypeEntry> listEntries(){
+        return getEntryArray().listItems();
+    }
+    public SparseTypeEntryArray getEntryArray() {
+        return entryArray;
+    }
+    @Override
+    protected void onChunkRefreshed() {
+        getHeaderBlock().setSparse(true);
+    }
+}

src/main/java/com/reandroid/arsc/container/PackageBody.java

@@ -116,8 +116,14 @@ public class PackageBody extends FixedBlockContainer {
     private void readTypeBlock(BlockReader reader) throws IOException{
         TypeHeader typeHeader = reader.readTypeHeader();
         SpecTypePair specTypePair = mSpecTypePairArray.getOrCreate(typeHeader.getId().get());
-        TypeBlock typeBlock = specTypePair.getTypeBlockArray().createNext();
-        typeBlock.readBytes(reader);
+        if(typeHeader.isSparse()){
+            SparseTypeBlock sparseTypeBlock = specTypePair
+                    .getSparseTypeBlockArray().createNext();
+            sparseTypeBlock.readBytes(reader);
+        }else {
+            TypeBlock typeBlock = specTypePair.getTypeBlockArray().createNext();
+            typeBlock.readBytes(reader);
+        }
     }
     private void readLibraryBlock(BlockReader reader) throws IOException{
         LibraryBlock libraryBlock=new LibraryBlock();

src/main/java/com/reandroid/arsc/container/SpecTypePair.java

@@ -16,15 +16,14 @@
 package com.reandroid.arsc.container;
 
 import com.reandroid.arsc.array.EntryArray;
-import com.reandroid.arsc.chunk.ChunkType;
+import com.reandroid.arsc.array.SparseTypeBlockArray;
+import com.reandroid.arsc.chunk.*;
 import com.reandroid.arsc.array.TypeBlockArray;
 import com.reandroid.arsc.base.Block;
 import com.reandroid.arsc.base.BlockContainer;
-import com.reandroid.arsc.chunk.PackageBlock;
-import com.reandroid.arsc.chunk.SpecBlock;
-import com.reandroid.arsc.chunk.TypeBlock;
 import com.reandroid.arsc.group.EntryGroup;
 import com.reandroid.arsc.header.HeaderBlock;
+import com.reandroid.arsc.header.TypeHeader;
 import com.reandroid.arsc.io.BlockReader;
 import com.reandroid.arsc.item.TypeString;
 import com.reandroid.arsc.value.Entry;
@@ -40,18 +39,31 @@ public class SpecTypePair extends BlockContainer<Block>
     private final Block[] mChildes;
     private final SpecBlock mSpecBlock;
     private final TypeBlockArray mTypeBlockArray;
+    private final SparseTypeBlockArray sparseTypeBlockArray;
     public SpecTypePair(SpecBlock specBlock, TypeBlockArray typeBlockArray){
         this.mSpecBlock = specBlock;
         this.mTypeBlockArray = typeBlockArray;
-        this.mChildes=new Block[]{specBlock, typeBlockArray};
+        this.sparseTypeBlockArray = new SparseTypeBlockArray();
+
+        this.mChildes=new Block[]{specBlock, typeBlockArray, sparseTypeBlockArray};
         mSpecBlock.setIndex(0);
         mTypeBlockArray.setIndex(1);
+        sparseTypeBlockArray.setIndex(2);
         mSpecBlock.setParent(this);
         mTypeBlockArray.setParent(this);
+        sparseTypeBlockArray.setParent(this);
     }
     public SpecTypePair(){
         this(new SpecBlock(), new TypeBlockArray());
     }
+
+    public SparseTypeBlockArray getSparseTypeBlockArray() {
+        return sparseTypeBlockArray;
+    }
+    public Collection<SparseTypeBlock> listSparseTypeBlock(){
+        return sparseTypeBlockArray.listItems();
+    }
+
     public Map<Integer, EntryGroup> createEntryGroups(){
         Map<Integer, EntryGroup> map = new HashMap<>();
         for(TypeBlock typeBlock:listTypeBlocks()){
@@ -211,7 +223,7 @@ public class SpecTypePair extends BlockContainer<Block>
         }
         ChunkType chunkType=headerBlock.getChunkType();
         if(chunkType == ChunkType.TYPE){
-            mTypeBlockArray.readBytes(reader);
+            readTypeBlock(reader);
             return;
         }
         if(chunkType!=ChunkType.SPEC){
@@ -219,6 +231,15 @@ public class SpecTypePair extends BlockContainer<Block>
         }
         mSpecBlock.readBytes(reader);
     }
+    private void readTypeBlock(BlockReader reader) throws IOException {
+        TypeHeader typeHeader = reader.readTypeHeader();
+        if(typeHeader.isSparse()){
+            SparseTypeBlock sparseTypeBlock = sparseTypeBlockArray.createNext();
+            sparseTypeBlock.readBytes(reader);
+            return;
+        }
+        mTypeBlockArray.readBytes(reader);
+    }
     private void readUnexpectedNonSpecBlock(BlockReader reader, HeaderBlock headerBlock) throws IOException{
         throw new IOException("Unexpected block: "+headerBlock.toString()+", Should be: "+ChunkType.SPEC);
     }
@@ -260,6 +281,7 @@ public class SpecTypePair extends BlockContainer<Block>
         }
         getSpecBlock().merge(typePair.getSpecBlock());
         getTypeBlockArray().merge(typePair.getTypeBlockArray());
+        getSparseTypeBlockArray().merge(typePair.getSparseTypeBlockArray());
     }
     @Override
     public int compareTo(SpecTypePair specTypePair) {

src/main/java/com/reandroid/arsc/header/TypeHeader.java

@@ -43,6 +43,18 @@ public class TypeHeader extends HeaderBlock{
         addChild(entriesStart);
         addChild(config);
     }
+    public boolean isSparse(){
+        return (getFlags().get() & FLAG_SPARSE) == FLAG_SPARSE;
+    }
+    public void setSparse(boolean sparse){
+        byte flag = getFlags().get();
+        if(sparse){
+            flag = (byte) (flag | FLAG_SPARSE);
+        }else {
+            flag = (byte) (flag & (~FLAG_SPARSE & 0xff));
+        }
+        getFlags().set(flag);
+    }
 
     @Override
     public int getMinimumSize(){
@@ -77,6 +89,8 @@ public class TypeHeader extends HeaderBlock{
                 +", config=" + getConfig() + '}';
     }
 
+    private static final byte FLAG_SPARSE = 0x1;
+
     //typeHeader.countBytes() - getConfig().countBytes() + ResConfig.SIZE_16
     private static final int TYPE_MIN_SIZE = 36;
 }

src/main/java/com/reandroid/arsc/value/SparseTypeEntry.java

@@ -0,0 +1,40 @@
+ /*
+  *  Copyright (C) 2022 github.com/REAndroid
+  *
+  *  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.reandroid.arsc.value;
+
+import com.reandroid.arsc.item.BlockItem;
+
+public class SparseTypeEntry extends BlockItem {
+    public SparseTypeEntry() {
+        super(4);
+    }
+    public int getIdx(){
+        return getShort(getBytesInternal(), 0) & 0xffff;
+    }
+    public void setIdx(int idx){
+        putShort(getBytesInternal(), 0, (short) idx);
+    }
+    public int getOffset(){
+        return getShort(getBytesInternal(), 2) & 0xffff;
+    }
+    public void setOffset(int offset){
+        putShort(getBytesInternal(), 2, (short) offset);
+    }
+    @Override
+    public String toString(){
+        return "idx=" + getIdx() + ", offset=" + getOffset();
+    }
+}