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Android binary resources read/write library
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/*
  *  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.base;

import com.reandroid.arsc.io.BlockReader;

import java.io.IOException;
import java.io.OutputStream;

public abstract class BlockContainer extends Block implements BlockRefresh{
    public BlockContainer(){
        super();
    }

    protected void onPreRefresh(){

    }
    protected abstract void onRefreshed();

    @Override
    public final void refresh(){
        if(isNull()){
            return;
        }
        onPreRefresh();
        refreshChildes();
        onRefreshed();
    }
    protected void refreshChildes(){
        T[] childes = getChildes();
        if(childes == null){
            return;
        }
        int length = childes.length;
        for(int i = 0; i < length; i++){
            T item = childes[i];
            if(item instanceof BlockRefresh){
                ((BlockRefresh)item).refresh();
            }
        }
    }
    @Override
    public void onCountUpTo(BlockCounter counter){
        if(counter.FOUND){
            return;
        }
        counter.setCurrent(this);
        if(counter.END==this){
            counter.FOUND=true;
            return;
        }
        T[] childes = getChildes();
        if(childes == null){
            return;
        }
        int max = childes.length;
        for(int i = 0; i < max; i++){
            if(counter.FOUND){
                return;
            }
            T item = childes[i];
            if(item != null){
                item.onCountUpTo(counter);
            }
        }
    }
    @Override
    public int countBytes(){
        if(isNull()){
            return 0;
        }
        T[] childes = getChildes();
        if(childes == null){
            return 0;
        }
        int result = 0;
        int max = childes.length;
        for(int i = 0; i < max; i++){
            T item = childes[i];
            if(item != null){
                result += item.countBytes();
            }
        }
        return result;
    }
    @Override
    public byte[] getBytes(){
        if(isNull()){
            return null;
        }
        T[] childes = getChildes();
        if(childes == null){
            return null;
        }
        byte[] results = null;
        int length = childes.length;
        for(int i = 0; i < length; i++){
            T item = childes[i];
            if(item != null){
                results = addBytes(results, item.getBytes());
            }
        }
        return results;
    }
    @Override
    public int onWriteBytes(OutputStream stream) throws IOException {
        if(isNull()){
            return 0;
        }
        T[] childes = getChildes();
        if(childes == null){
            return 0;
        }
        int result = 0;
        int length = childes.length;
        for(int i = 0; i < length; i++){
            T item = childes[i];
            if(item != null){
                result += item.writeBytes(stream);
            }
        }
        return result;
    }

    @Override
    public void onReadBytes(BlockReader reader) throws IOException{
        T[] childes = getChildes();
        if(childes == null){
            return;
        }
        int length = childes.length;
        for(int i = 0; i < length; i++){
            T item = childes[i];
            if(item != null){
                item.readBytes(reader);
            }
        }
    }
    public abstract int getChildesCount();
    public abstract T[] getChildes();
}