AbstractDataAdapter.java

/*******************************************************************************
 * Copyright (c) 2010 Red Hat, Inc.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *    Red Hat - initial API and implementation
 *******************************************************************************/
package org.eclipse.linuxtools.internal.oprofile.core.opxml;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.nio.charset.StandardCharsets;

import javax.xml.transform.Result;
import javax.xml.transform.Source;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import org.w3c.dom.Document;

public abstract class AbstractDataAdapter {

    /**
     * @return a Document representing the newly created XML data.
     */
    public abstract Document getDocument ();

    /**
     * parse the XML data modifying it as necessary to produce the necessary
     * XML output.
     */
    public abstract void process ();

    /**
     * @return an InputStream to the newly created XML data.
     */
    public InputStream getInputStream() {
        InputStream inp = null;
        Source source = new DOMSource(getDocument());
        StringWriter stw = new StringWriter();
        Result result = new StreamResult(stw);
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer xformer;
        try {
            xformer = factory.newTransformer();
            xformer.setOutputProperty("indent", "yes"); //$NON-NLS-1$ //$NON-NLS-2$
            xformer.transform(source, result);
            inp = new ByteArrayInputStream(stw.toString().getBytes(StandardCharsets.UTF_8));
        } catch (TransformerException e) {
            e.printStackTrace();
        }
        return inp;
    }

    @Override
    public String toString (){
        String ret = null;
        Source source = new DOMSource(getDocument());
        StringWriter stw = new StringWriter();
        Result result = new StreamResult(stw);
        TransformerFactory factory = TransformerFactory.newInstance();
        Transformer xformer;
        try {
            xformer = factory.newTransformer();
            xformer.setOutputProperty("indent", "yes"); //$NON-NLS-1$ //$NON-NLS-2$
            xformer.transform(source, result);
            ret = stw.toString();
        } catch (TransformerException e) {
            e.printStackTrace();
        }
        return ret;
    }

}