/*
 * 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.nifi.processors.stateless.retrieval;

import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.apache.nifi.processor.ProcessContext;
import org.apache.nifi.processors.stateless.ExecuteStateless;
import org.apache.nifi.registry.flow.VersionedFlowSnapshot;

import java.io.IOException;
import java.io.InputStream;

public class FileSystemDataflowProvider implements DataflowProvider {
    @Override
    public VersionedFlowSnapshot retrieveDataflowContents(final ProcessContext context) throws IOException {
        final ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);

        try (final InputStream in = context.getProperty(ExecuteStateless.DATAFLOW_FILE).asResource().read()) {
            final VersionedFlowSnapshot versionedFlowSnapshot = objectMapper.readValue(in, VersionedFlowSnapshot.class);
            return versionedFlowSnapshot;
        }
    }
}
