com.bitsofproof.dropwizard.supernode.jackson.TransactionSerializer.java Source code

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Here is the source code for com.bitsofproof.dropwizard.supernode.jackson.TransactionSerializer.java

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/*
 * Copyright 2013 bits of proof zrt.
 *
 * 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 com.bitsofproof.dropwizard.supernode.jackson;

import com.bitsofproof.supernode.api.Transaction;
import com.bitsofproof.supernode.common.WireFormat;
import com.fasterxml.jackson.annotation.JsonFormat;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.*;
import com.fasterxml.jackson.databind.introspect.Annotated;
import com.fasterxml.jackson.databind.ser.ContextualSerializer;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;

import java.io.IOException;
import java.lang.reflect.Type;
import java.util.Objects;

public class TransactionSerializer extends StdSerializer<Transaction> implements ContextualSerializer {
    public static final String HEX_FORMAT = "hex";
    public static final String BASE64_FORMAT = "base64";

    public TransactionSerializer() {
        super(Transaction.class);
    }

    private static class HexTransactionSerializer extends TransactionSerializer {
        @Override
        public void serialize(Transaction value, JsonGenerator jgen, SerializerProvider provider)
                throws IOException {
            if (value != null)
                jgen.writeString(value.toWireDump());
        }
    }

    private static class Base64TransactionSerializer extends TransactionSerializer {
        @Override
        public void serialize(Transaction value, JsonGenerator jgen, SerializerProvider provider)
                throws IOException {
            if (value != null) {
                WireFormat.Writer writer = new WireFormat.Writer();
                value.toWire(writer);
                jgen.writeBinary(writer.toByteArray());
            }
        }
    }

    @Override
    public void serialize(Transaction value, JsonGenerator jgen, SerializerProvider provider) throws IOException {
        throw new IllegalStateException("This method should be implemented by a subclass");
    }

    @Override
    public JsonNode getSchema(SerializerProvider provider, Type typeHint) throws JsonMappingException {
        return createSchemaNode("string");
    }

    @Override
    public JsonSerializer<?> createContextual(SerializerProvider prov, BeanProperty property)
            throws JsonMappingException {
        if (property != null) {
            JsonFormat.Value format = prov.getAnnotationIntrospector().findFormat((Annotated) property.getMember());
            if (format != null && Objects.equals(BASE64_FORMAT, format.getPattern())) {
                return new Base64TransactionSerializer();
            }
        }

        return new HexTransactionSerializer();
    }
}