com.alachisoft.ncache.client.internal.caching.DataReaderCommon Maven / Gradle / Ivy

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package com.alachisoft.ncache.client.internal.caching;

import Alachisoft.NCache.Caching.CompressedValueEntry;
import Alachisoft.NCache.Common.BitSetConstants;
import Alachisoft.NCache.Common.Caching.UserBinaryObject;
import Alachisoft.NCache.Common.CompressionUtil;

import com.alachisoft.ncache.client.internal.datastructure.DataTypeCreator;
import com.alachisoft.ncache.runtime.exceptions.OperationFailedException;
import com.alachisoft.ncache.serialization.JSON.JsonBinaryFormatter;
import com.alachisoft.ncache.runtime.JSON.JsonUtil;
import com.alachisoft.ncache.serialization.standard.CompactBinaryFormatter;

import java.io.IOException;

abstract class DataReaderCommon
{
    protected CacheImpl _cache;

    protected  T extractObjectFromCompressedValueEntry(CompressedValueEntry cmpEntry, Class cls) throws IOException, ClassNotFoundException, OperationFailedException {
        Object obj = cmpEntry.getValue();

        switch (cmpEntry.getType())
        {
            case Set:
            case List:
            case Queue:
            case Counter:
            case Dictionary:
                String key = null;
                tangible.RefObject tempRef_key = new tangible.RefObject(key);
                boolean tempVar = tryGetKeyFromCurrentRow(tempRef_key) && _cache != null;
                key = tempRef_key.argvalue;
                if (tempVar)
                {
                    obj = DataTypeCreator.createDataTypeHandle(cmpEntry.getType(), key, _cache,cls);
                }
                break;
            case CacheItem:
                obj = convertToUserObject(cmpEntry,cls);
                break;
        }
        return (T) obj;
    }

    protected  T extractFromCompressedValueEntry(CompressedValueEntry cmpEntry, Class cls) throws OperationFailedException, IOException, ClassNotFoundException {
        Object obj = cmpEntry.getValue();

        switch (cmpEntry.getType())
        {
            case Set:
            case List:
            case Queue:
            case Counter:
            case Dictionary:
                String key = null;
                tangible.RefObject tempRef_key = new tangible.RefObject(key);
                boolean tempVar = tryGetKeyFromCurrentRow(tempRef_key) && _cache != null;
                key = tempRef_key.argvalue;
                if (tempVar)
                {
                    obj = DataTypeCreator.createDataTypeHandle(cmpEntry.getType(), key, _cache,cls);
                }
                break;
            case CacheItem:
                obj = (T)convertToUserObject(cmpEntry,cls);
                break;
        }
        return JsonUtil.getValueAs(obj,cls);
    }

    protected  T convertToUserObject(CompressedValueEntry cmpEntry, Class cls) throws OperationFailedException, IOException, ClassNotFoundException {
        if (cmpEntry == null)
        {
            return null;
        }

        if (cmpEntry.getValue() == null)
        {
            return null;
        }

        UserBinaryObject ubObject = (UserBinaryObject)((cmpEntry.getValue() instanceof UserBinaryObject) ? cmpEntry.getValue() : null);

        if (ubObject != null)
        {
            cmpEntry.setValue(ubObject.getFullObject());
        }

        if (cmpEntry.getValue() instanceof byte[])
        {
            if (cmpEntry.getFlag().IsBitSet((byte) BitSetConstants.Compressed))
            {
                cmpEntry.setValue( CompressionUtil.Decompress((byte[])cmpEntry.getValue()));
            }

            if (_cache != null && _cache.getCacheImpl().getEncryptionEnabled())
            {
                cmpEntry.setValue( CacheHelper.DecryptData((byte[])cmpEntry.getValue(), _cache.getCacheImpl().getName()));
            }

            if (cmpEntry.getFlag().IsBitSet((byte) BitSetConstants.BinaryData))
            {
                return (T)cmpEntry.getValue();
            }

            if (cmpEntry.getFlag().IsBitSet((byte) BitSetConstants.JsonData))
            {
                cmpEntry.setValue(JsonBinaryFormatter.fromByteBuffer((byte[])cmpEntry.getValue(),cls));
            }

            else
            {
                cmpEntry.setValue(CompactBinaryFormatter.fromByteBuffer((byte[])cmpEntry.getValue(), _cache.getCacheImpl().getName()));
            }
        }
        return (T)cmpEntry.getValue();
    }

    protected abstract boolean tryGetKeyFromCurrentRow(tangible.RefObject key);
}