PipesRequestDeserializer.java

/*
 * 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.tika.pipes.core.serialization;

import java.io.IOException;

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.fasterxml.jackson.databind.JsonNode;

import org.apache.tika.pipes.api.FetchEmitTuple;

class PipesRequestDeserializer extends JsonDeserializer<PipesRequest> {

    @Override
    public PipesRequest deserialize(JsonParser p, DeserializationContext ctxt)
            throws IOException {
        JsonNode root = p.readValueAsTree();
        JsonNode tupleNode = root.get(PipesRequest.TUPLE);
        if (tupleNode == null) {
            throw new IOException("PipesRequest is missing its '" + PipesRequest.TUPLE + "' field");
        }
        FetchEmitTuple tuple = p.getCodec().treeToValue(tupleNode, FetchEmitTuple.class);
        JsonNode bytesNode = root.get(PipesRequest.INLINE_BYTES);
        byte[] inlineBytes = bytesNode == null ? null : bytesNode.binaryValue();
        return new PipesRequest(tuple, inlineBytes);
    }
}