com.telekom.api.common.webrequest.JsonSerializer.java Source code

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Here is the source code for com.telekom.api.common.webrequest.JsonSerializer.java

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/*
 * This file is part of the Telekom Java SDK
 * Copyright 2010 Deutsche Telekom AG
 *
 * 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.telekom.api.common.webrequest;

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

import com.fasterxml.jackson.annotation.JsonInclude.Include;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonSerializer {

    private static ObjectMapper mapper = new ObjectMapper();

    static {
        // Do not include properties that are set to null
        mapper.setSerializationInclusion(Include.NON_NULL);

        // Although all JSON properties are reflected in the class structure,
        // the introduction of new properties should not raise exceptions
        // which would force applications to update the SDK.
        // Comment out the following line during SDK development:
        mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    public static <T> T deserialize(String jsonAsString, Class<T> valueType) throws IOException {

        // Workaround: Before the call is established, the VoiceCall backend
        // returns an object instead of an
        // expected value type
        jsonAsString = jsonAsString.replace("{\"@nil\":\"true\"}", "null");

        return mapper.readValue(jsonAsString, valueType);
    }

    public static <T> T deserialize(InputStream stream, Class<T> valueType) throws IOException {

        // Convert stream to string first , because the string deserialization
        // routine
        // contains a workaround
        InputStreamReader sr = new InputStreamReader(stream);
        StringBuilder sbBuilder = new StringBuilder();
        char[] buff = new char[1024];
        while (true) {
            int charsRead = sr.read(buff, 0, buff.length);

            if (charsRead == -1)
                break;

            sbBuilder.append(buff, 0, charsRead);
        }
        String content = sbBuilder.toString();

        return deserialize(content, valueType);
        // return mapper.readValue(stream, valueType);
    }

    public static String serialize(Object o) throws IOException {
        return mapper.writeValueAsString(o);
    }

    public static byte[] serializeToBytes(Object o) throws IOException {
        return mapper.writeValueAsBytes(o);
    }

}