/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 org.apache.ignite.internal.binary;

import java.util.Collection;
import java.util.HashMap;
import org.apache.ignite.binary.BinaryObjectException;
import org.apache.ignite.binary.BinaryType;

/**
 * Simple caching metadata handler. Used mainly in tests.
 */
public class BinaryCachingMetadataHandler implements BinaryMetadataHandler {
    /** Cached metadatas. */
    private final HashMap<Integer, BinaryType> metas = new HashMap<>();

    /**
     * Create new handler instance.
     *
     * @return New handler.
     */
    public static BinaryCachingMetadataHandler create() {
        return new BinaryCachingMetadataHandler();
    }

    /**
     * Private constructor.
     */
    private BinaryCachingMetadataHandler() {
        // No-op.
    }

    /** {@inheritDoc} */
    @Override public synchronized void addMeta(int typeId, BinaryType type, boolean failIfUnregistered) throws BinaryObjectException {
        synchronized (this) {
            BinaryType oldType = metas.put(typeId, type);

            if (oldType != null) {
                BinaryMetadata oldMeta = ((BinaryTypeImpl)oldType).metadata();
                BinaryMetadata newMeta = ((BinaryTypeImpl)type).metadata();

                BinaryMetadata mergedMeta = BinaryUtils.mergeMetadata(oldMeta, newMeta);

                BinaryType mergedType = mergedMeta.wrap(((BinaryTypeImpl)oldType).context());

                metas.put(typeId, mergedType);
            }
        }
    }

    /** {@inheritDoc} */
    @Override public synchronized BinaryType metadata(int typeId) throws BinaryObjectException {
        return metas.get(typeId);
    }

    /** {@inheritDoc} */
    @Override public synchronized BinaryMetadata metadata0(int typeId) throws BinaryObjectException {
        BinaryTypeImpl type = (BinaryTypeImpl)metas.get(typeId);

        return type != null ? type.metadata() : null;
    }

    /** {@inheritDoc} */
    @Override public synchronized BinaryType metadata(int typeId, int schemaId) throws BinaryObjectException {
        BinaryTypeImpl type = (BinaryTypeImpl) metas.get(typeId);
        return type != null && type.metadata().hasSchema(schemaId) ? type : null;
    }

    /** {@inheritDoc} */
    @Override public Collection<BinaryType> metadata() throws BinaryObjectException {
        return metas.values();
    }
}