com.centurylink.mdw.jaxb.JaxbElementTranslator Maven / Gradle / Ivy

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MDW is a workflow framework specializing in microservice orchestration
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/*
 * Copyright (C) 2017 CenturyLink, Inc.
 *
 * 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.centurylink.mdw.jaxb;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;

import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

import org.w3c.dom.Document;
import org.w3c.dom.Node;

import com.centurylink.mdw.translator.DocumentReferenceTranslator;
import com.centurylink.mdw.translator.TranslationException;
import com.centurylink.mdw.translator.XmlDocumentTranslator;
import com.centurylink.mdw.xml.DomHelper;

public class JaxbElementTranslator extends DocumentReferenceTranslator implements XmlDocumentTranslator {

    private Marshaller marshaller;
    public Marshaller getMarshaller() { return marshaller; }
    public void setMarshaller(Marshaller marshaller) { this.marshaller = marshaller; }

    private Unmarshaller unmarshaller;
    public Unmarshaller getUnmarshaller() { return unmarshaller; }
    public void setUnmarshaller(Unmarshaller unmarshaller) { this.unmarshaller = unmarshaller; }

    public Object getJaxbObject(String xml) throws TranslationException {
        return realToObject(xml);
    }

    public String getXml(Object jaxbObject) throws TranslationException {
        return realToString(jaxbObject);
    }

    public Object realToObject(String str) throws TranslationException {
        try {
            ByteArrayInputStream in = new ByteArrayInputStream(str.getBytes());
            return unmarshaller.unmarshal(in);
        } catch (JAXBException ex) {
            throw new TranslationException(ex.getMessage(), ex);
        }
    }

    public String realToString(Object obj) throws TranslationException {
        try {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
            marshaller.marshal(obj, out);
            return out.toString();
        }
        catch (JAXBException ex) {
            throw new TranslationException(ex.getMessage(), ex);
        }
    }

    public Document toDomDocument(Object obj) throws TranslationException {
        try {
            // TODO: use JAXB Binder to avoid reparse
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            marshaller.marshal(obj, out);
            return DomHelper.toDomDocument(out.toString());
        }
        catch (Exception ex) {
            throw new TranslationException(ex.getMessage(), ex);
        }
    }

    public Object fromDomNode(Node domNode) throws TranslationException {
        try {
            return unmarshaller.unmarshal(domNode);
        }
        catch (JAXBException ex) {
            throw new TranslationException(ex.getMessage(), ex);
        }
    }

}