com.nominanuda.hyperapi.JsonAnyValueDecoder.java Source code

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Here is the source code for com.nominanuda.hyperapi.JsonAnyValueDecoder.java

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/*
 * Copyright 2008-2011 the original author or authors.
 * 
 * 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.nominanuda.hyperapi;

import static com.nominanuda.dataobject.DataStructHelper.STRUCT;
import static com.nominanuda.io.IOHelper.IO;

import java.io.IOException;
import java.io.StringReader;

import org.apache.http.HttpEntity;

import com.nominanuda.dataobject.DataStruct;
import com.nominanuda.lang.Maths;

public class JsonAnyValueDecoder extends AbstractEntityDecoder<Object> {

    public JsonAnyValueDecoder() {
        this(CT_APPLICATION_JSON);
    }

    public JsonAnyValueDecoder(String contentType) {
        super(Object.class, contentType);
    }

    @Override
    protected Object decodeInternal(AnnotatedType p, HttpEntity entity) throws IOException {
        String s = IO.readAndCloseUtf8(entity.getContent());
        if ("null".equals(s)) {
            return null;
        } else if ("true".equals(s) || "false".equals(s)) {
            return Boolean.valueOf(s);
        } else if (Maths.isNumber(s)) {
            if (Maths.isInteger(s)) {
                return Long.valueOf(s);
            } else {
                return Double.valueOf(s);
            }
        } else if (s.startsWith("\"") && s.length() > 1) {
            return STRUCT.jsonStringUnescape(s.substring(1, s.length() - 1));
        } else {
            DataStruct ds = STRUCT.parse(new StringReader(s));
            return ds;
        }
    }
}