com.goodow.realtime.json.util.Xml.java Source code

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Here is the source code for com.goodow.realtime.json.util.Xml.java

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/*
 * Copyright 2014 Goodow.com
 * 
 * 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.goodow.realtime.json.util;

import com.goodow.realtime.json.JsonElement;
import com.goodow.realtime.json.JsonException;
import com.goodow.realtime.json.impl.JreJsonArray;
import com.goodow.realtime.json.impl.JreJsonElement;
import com.goodow.realtime.json.impl.JreJsonObject;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;

import java.util.List;
import java.util.Map;

public class Xml {
    private static final JacksonXmlModule module = new XmlModule();
    private static final XmlMapper mapper;
    static {
        // module.setDefaultUseWrapper(true);
        mapper = new XmlMapper(module);
    }

    @SuppressWarnings("unchecked")
    public static <T extends JsonElement> T parse(String xml) {
        Object value = decodeXml(xml, Object.class);
        if (value instanceof Map) {
            return (T) new JreJsonObject((Map<String, Object>) value);
        } else if (value instanceof List) {
            return (T) new JreJsonArray((List<Object>) value);
        } else {
            throw new JsonException("Can't parse XML string: " + xml);
        }
    }

    public static String toXml(Object obj) {
        if (obj instanceof JreJsonElement) {
            obj = ((JreJsonElement) obj).toNative();
        }
        try {
            return mapper.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            throw new JsonException("Failed to encode as XML: " + e.getMessage());
        }
    }

    @SuppressWarnings("unchecked")
    private static <T> T decodeXml(String xml, Class<?> clazz) throws JsonException {
        try {
            return (T) mapper.readValue(xml, clazz);
        } catch (Exception e) {
            throw new JsonException("Can't parse XML string: " + e.getMessage());
        }
    }
}