Java XML Element Get getElements(final String elementName, final InputStream is, final boolean onlyValues)

Description

get Elements

License

Open Source License

Parameter

Parameter	Description
elementName	a parameter
is	a parameter
onlyValues	a parameter

Exception

Parameter	Description
XMLStreamException	an exception
UnsupportedEncodingException	an exception

Return

Collection

Declaration

private static Collection<String> getElements(final String elementName,
        final InputStream is, final boolean onlyValues)
        throws XMLStreamException, UnsupportedEncodingException 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Manchester Institute of Biotechnology
 * University of Manchester//from ww  w.jav a2 s.  co m
 * Manchester M1 7ND
 * United Kingdom
 * 
 * Copyright (C) 2013 University of Manchester
 * 
 * This program is released under the Academic Free License ("AFL") v3.0.
 * (http://www.opensource.org/licenses/academic.php)
 *******************************************************************************/

import java.io.*;

import java.nio.charset.*;
import java.util.*;

import javax.xml.stream.*;
import javax.xml.stream.events.*;

public class Main {
    /**
     * 
     * @param elementName
     * @param is
     * @param onlyValues
     * @return Collection
     * @throws XMLStreamException
     * @throws UnsupportedEncodingException
     */
    private static Collection<String> getElements(final String elementName,
            final InputStream is, final boolean onlyValues)
            throws XMLStreamException, UnsupportedEncodingException {
        final Collection<String> elements = new ArrayList<>();
        final ByteArrayOutputStream os = new ByteArrayOutputStream();
        final XMLEventReader reader = XMLInputFactory.newInstance()
                .createXMLEventReader(
                        new InputStreamReader(is, Charset.defaultCharset()
                                .name()));
        final XMLEventWriter writer = XMLOutputFactory.newInstance()
                .createXMLEventWriter(
                        new OutputStreamWriter(os, Charset.defaultCharset()
                                .name()));
        boolean read = false;
        String characters = null;

        while (reader.peek() != null) {
            final XMLEvent event = (XMLEvent) reader.next();

            switch (event.getEventType()) {
            case XMLStreamConstants.START_DOCUMENT:
            case XMLStreamConstants.END_DOCUMENT: {
                // Ignore.
                break;
            }
            case XMLStreamConstants.START_ELEMENT: {
                read = read
                        || elementName.equals(event.asStartElement()
                                .getName().getLocalPart());

                if (read && !onlyValues) {
                    writer.add(event);
                }

                break;
            }
            case XMLStreamConstants.ATTRIBUTE: {
                if (read && !onlyValues) {
                    writer.add(event);
                }
                break;
            }
            case XMLStreamConstants.CHARACTERS: {
                if (read && !onlyValues) {
                    writer.add(event);
                }
                characters = event.asCharacters().getData();
                break;
            }
            case XMLStreamConstants.END_ELEMENT: {
                if (read && !onlyValues) {
                    writer.add(event);
                }
                if (elementName.equals(event.asEndElement().getName()
                        .getLocalPart())) {
                    writer.flush();

                    if (characters != null) {
                        elements.add(characters);
                    }

                    os.reset();
                    read = false;
                }
                break;
            }
            default: {
                // Ignore
                break;
            }
            }
        }

        return elements;
    }
}

Related

1. getElements(Element node)
2. getElements(Element root)
3. getElements(Element root, String element)
4. getElements(Element root, String tagName)
5. getElements(Element topElm)
6. getElementsByName(Element elem, String s)
7. getElementsByTag(Element element, String tag)
8. getElementsByTagName(Element aElement, String aTagName)
9. getElementsByTagName(Element element, String tag)