GsonXMLStreamWriterTest.java

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 * 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
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 * Unless required by applicable law or agreed to in writing,
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package org.apache.axis2.json.gson;

import com.google.gson.stream.JsonWriter;
import org.apache.axiom.om.OMAbstractFactory;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMFactory;
import org.apache.axiom.om.OMNamespace;
import org.apache.axis2.context.ConfigurationContext;
import org.apache.axis2.engine.AxisConfiguration;
import org.apache.ws.commons.schema.XmlSchema;
import org.apache.ws.commons.schema.XmlSchemaCollection;
import org.junit.Assert;
import org.junit.Test;

import javax.xml.namespace.QName;
import javax.xml.transform.stream.StreamSource;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.util.ArrayList;
import java.util.List;


public class GsonXMLStreamWriterTest {
    private String jsonString;

    @Test
    public void testGsonXMLStreamWriter() throws Exception {
        jsonString = "{\"response\":{\"return\":{\"name\":\"kate\",\"age\":\"35\",\"gender\":\"female\"}}}";
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        OutputStreamWriter outputStreamWriter = new OutputStreamWriter(baos, "UTF-8");
        JsonWriter jsonWriter = new JsonWriter(outputStreamWriter);
        String fileName = "test-resources/custom_schema/testSchema_1.xsd";
        InputStream is = new FileInputStream(fileName);
        XmlSchemaCollection schemaCol = new XmlSchemaCollection();
        XmlSchema schema = schemaCol.read(new StreamSource(is));
        List<XmlSchema> schemaList = new ArrayList<XmlSchema>();
        schemaList.add(schema);
        QName elementQName = new QName("http://www.w3schools.com", "response");
        ConfigurationContext configCtxt = new ConfigurationContext(new AxisConfiguration());

        GsonXMLStreamWriter gsonXMLStreamWriter = new GsonXMLStreamWriter(jsonWriter, elementQName, schemaList, configCtxt);
        OMElement omElement = getResponseOMElement();
        gsonXMLStreamWriter.writeStartDocument();
        omElement.serialize(gsonXMLStreamWriter);
        gsonXMLStreamWriter.writeEndDocument();

        String actualString = baos.toString();
        outputStreamWriter.close();
        Assert.assertEquals(jsonString, actualString);
    }


    private OMElement getResponseOMElement() {
        OMFactory omFactory = OMAbstractFactory.getOMFactory();
        OMNamespace ns = omFactory.createOMNamespace("", "");

        OMElement response = omFactory.createOMElement("response", ns);
        OMElement ret = omFactory.createOMElement("return", ns);
        OMElement name = omFactory.createOMElement("name", ns);
        name.setText("kate");
        OMElement age = omFactory.createOMElement("age", ns);
        age.setText("35");
        OMElement gender = omFactory.createOMElement("gender", ns);
        gender.setText("female");
        ret.addChild(name);
        ret.addChild(age);
        ret.addChild(gender);
        response.addChild(ret);
        return response;
    }
}