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/*
 * 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 org.apache.flink.streaming.util.serialization;

import org.apache.flink.api.common.serialization.DeserializationSchema;
import org.apache.flink.api.common.serialization.SerializationSchema;

import org.apache.pulsar.client.api.Schema;
import org.apache.pulsar.common.schema.SchemaInfo;

import java.io.IOException;
import java.io.Serializable;

/**
 * flink format for Pulsar schema.
 * @param 
 */
public class FlinkSchema implements Schema, Serializable {

    private final SchemaInfo schemaInfo;

    private final SerializationSchema serializer;

    private final DeserializationSchema deserializer;

    public FlinkSchema(SchemaInfo schemaInfo, SerializationSchema serializer,
                       DeserializationSchema deserializer) {
        this.schemaInfo = schemaInfo;
        this.serializer = serializer;
        this.deserializer = ThreadSafeDeserializationSchema.of(deserializer);
    }

    @Override
    public void validate(byte[] message) {
    }

    @Override
    public byte[] encode(T t) {
        if (serializer == null) {
            throw new UnsupportedOperationException();
        }
        return serializer.serialize(t);
    }

    @Override
    public T decode(byte[] bytes) {
        if (deserializer == null) {
            throw new UnsupportedOperationException();
        }
        try {
            return deserializer.deserialize(bytes);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public SchemaInfo getSchemaInfo() {
        return schemaInfo;
    }

    @Override
    public Schema clone() {
        return this;
    }
}