ARSCLib/src/main/java/com/reandroid/lib/arsc/array/ResXmlAttributeArray.java

package com.reandroid.lib.arsc.array;

import com.reandroid.lib.arsc.base.Block;
import com.reandroid.lib.arsc.base.BlockArray;
import com.reandroid.lib.arsc.header.HeaderBlock;
import com.reandroid.lib.arsc.io.BlockReader;
import com.reandroid.lib.arsc.chunk.xml.ResXmlAttribute;
import com.reandroid.lib.arsc.item.ShortItem;
import com.reandroid.lib.json.JSONConvert;
import com.reandroid.lib.json.JSONArray;
import com.reandroid.lib.json.JSONObject;

import java.io.IOException;
import java.util.Comparator;

public class ResXmlAttributeArray extends BlockArray<ResXmlAttribute>
        implements Comparator<ResXmlAttribute>, JSONConvert<JSONArray> {
    private final HeaderBlock mHeaderBlock;
    private final ShortItem mAttributeStart;
    private final ShortItem mAttributeCount;
    public ResXmlAttributeArray(HeaderBlock headerBlock, ShortItem attributeStart, ShortItem attributeCount){
        this.mHeaderBlock=headerBlock;
        this.mAttributeStart=attributeStart;
        this.mAttributeCount=attributeCount;
    }
    public void sortAttributes(){
        sort(this);
    }
    private void refreshCount(){
        short count= (short) childesCount();
        mAttributeCount.set(count);
    }
    private void refreshStart(){
        Block parent=getParent();
        if(parent==null){
            return;
        }
        int start = parent.countUpTo(this);
        start=start-mHeaderBlock.countBytes();
        mAttributeStart.set((short) start);
    }
    @Override
    public ResXmlAttribute newInstance() {
        return new ResXmlAttribute();
    }
    @Override
    public ResXmlAttribute[] newInstance(int len) {
        return new ResXmlAttribute[len];
    }
    @Override
    protected void onRefreshed() {
        refreshCount();
        refreshStart();
    }
    @Override
    public void onReadBytes(BlockReader reader) throws IOException {
        int start=mHeaderBlock.getHeaderSize()+mAttributeStart.get();
        reader.seek(start);
        setChildesCount(mAttributeCount.get());
        super.onReadBytes(reader);
    }
    @Override
    public int compare(ResXmlAttribute attr1, ResXmlAttribute attr2) {
        return attr1.compareTo(attr2);
    }

    @Override
    public JSONArray toJson() {
        sortAttributes();
        JSONArray jsonArray=new JSONArray();
        int i=0;
        for(ResXmlAttribute attr:listItems()){
            JSONObject jsonObject = attr.toJson();
            jsonArray.put(i, jsonObject);
            i++;
        }
        return jsonArray;
    }
    @Override
    public void fromJson(JSONArray json) {
        clearChildes();
        int length= json.length();
        ensureSize(length);
        for(int i=0;i<length;i++){
            ResXmlAttribute attribute=get(i);
            JSONObject jsonObject= json.getJSONObject(i);
            attribute.fromJson(jsonObject);
        }
    }
}