alvinalexander.com | career | drupal | java | mac | mysql | perl | scala | uml | unix  

Apache CXF example source code file (JDOMStreamReader.java)

This example Apache CXF source code file (JDOMStreamReader.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

characters, element, elementframe, elementframe, integer, jdomstreamreader, map, namespace, namespace, override, override, string, string, unsupportedoperationexception, util

The Apache CXF JDOMStreamReader.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * 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
 *
 * 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 org.apache.cxf.aegis.util.stax;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.XMLStreamException;

import org.apache.cxf.staxutils.AbstractDOMStreamReader;
import org.apache.cxf.staxutils.FastStack;
import org.jdom.Attribute;
import org.jdom.CDATA;
import org.jdom.Comment;
import org.jdom.Content;
import org.jdom.Document;
import org.jdom.Element;
import org.jdom.EntityRef;
import org.jdom.Namespace;
import org.jdom.Text;

/**
 * Facade for DOMStreamReader using JDOM implmentation.
 * 
 * @author <a href="mailto:tsztelak@gmail.com">Tomasz Sztelak
 */
public class JDOMStreamReader extends AbstractDOMStreamReader<Element, Integer> {

    private Content content;

    private FastStack<Map namespaceStack
        = new FastStack<Map();

    private List<Namespace> namespaces = new ArrayList();

    private Map<String, Namespace> prefix2decNs;

    private JDOMNamespaceContext namespaceContext;

    /**
     * @param element
     */
    public JDOMStreamReader(Element element) {
        super(new ElementFrame<Element, Integer>(element, null, -1));

        namespaceContext = new JDOMNamespaceContext();
        setupNamespaces(element);
    }

    /**
     * @param document
     */
    public JDOMStreamReader(Document document) {
        this(document.getRootElement());
    }

    public static String toStaxType(int jdom) {
        String val;
        switch (jdom) {
        case Attribute.CDATA_TYPE:
            val = "CDATA";
            break;
        case Attribute.ID_TYPE:
            val = "ID";
            break;
        case Attribute.IDREF_TYPE:
            val = "IDREF";
            break;
        case Attribute.IDREFS_TYPE:
            val = "IDREFS";
            break;
        case Attribute.ENTITY_TYPE:
            val = "ENTITY";
            break;
        case Attribute.ENTITIES_TYPE:
            val = "ENTITIES";
            break;
        case Attribute.ENUMERATED_TYPE:
            val = "ENUMERATED";
            break;
        case Attribute.NMTOKEN_TYPE:
            val = "NMTOKEN";
            break;
        case Attribute.NMTOKENS_TYPE:
            val = "NMTOKENS";
            break;
        case Attribute.NOTATION_TYPE:
            val = "NOTATION";
            break;
        default:
            val = null;
        }
        return val;
    }

    private void setupNamespaces(Element element) {
        namespaceContext.setElement(element);

        if (prefix2decNs != null) {
            namespaceStack.push(prefix2decNs);
        }

        prefix2decNs = new HashMap<String, Namespace>();
        namespaces.clear();

        for (Iterator itr = element.getAdditionalNamespaces().iterator(); itr.hasNext();) {
            declare((Namespace)itr.next());
        }

        Namespace ns = element.getNamespace();

        if (shouldDeclare(ns)) {
            declare(ns);
        }

        for (Iterator itr = element.getAttributes().iterator(); itr.hasNext();) {
            ns = ((Attribute)itr.next()).getNamespace();
            if (shouldDeclare(ns)) {
                declare(ns);
            }
        }
    }

    private void declare(Namespace ns) {
        prefix2decNs.put(ns.getPrefix(), ns);
        namespaces.add(ns);
    }

    private boolean shouldDeclare(Namespace ns) {
        if (ns == Namespace.XML_NAMESPACE) {
            return false;
        }

        if (ns == Namespace.NO_NAMESPACE && getDeclaredURI("") == null) {
            return false;
        }

        String decUri = getDeclaredURI(ns.getPrefix());

        return !(decUri != null && decUri.equals(ns.getURI()));
    }

    private String getDeclaredURI(String string) {
        for (int i = namespaceStack.size() - 1; i == 0; i--) {
            Map<String, Namespace> nmspaces = namespaceStack.get(i);

            Namespace dec = nmspaces.get(string);

            if (dec != null) {
                return dec.getURI();
            }
        }
        return null;
    }

    @Override
    protected void endElement() {
        if (namespaceStack.size() > 0) {
            prefix2decNs = namespaceStack.pop();
        }
    }

    public Element getCurrentElement() {
        return getCurrentFrame().getElement();
    }

    @Override
    protected ElementFrame<Element, Integer> getChildFrame() {
        int currentChild = getCurrentFrame().getCurrentChild();
        return new ElementFrame<Element, Integer>((Element)getCurrentElement().getContent(currentChild),
                                                  getCurrentFrame(),
                                                  -1);
    }

    @Override
    protected boolean hasMoreChildren() {
        int currentChild = getCurrentFrame().getCurrentChild();
        return currentChild < (getCurrentElement().getContentSize() - 1);
    }

    @Override
    protected int nextChild() {
        int currentChild = getCurrentFrame().getCurrentChild();
        currentChild++;
        getCurrentFrame().setCurrentChild(currentChild);
        this.content = getCurrentElement().getContent(currentChild);

        if (content instanceof Text) {
            return CHARACTERS;
        } else if (content instanceof Element) {
            setupNamespaces((Element)content);
            return START_ELEMENT;
        } else if (content instanceof CDATA) {
            return CHARACTERS;
        } else if (content instanceof Comment) {
            return CHARACTERS;
        } else if (content instanceof EntityRef) {
            return ENTITY_REFERENCE;
        }

        throw new IllegalStateException();
    }

    @Override
    public String getElementText() throws XMLStreamException {
        return ((Text)content).getText();
    }

    @Override
    public String getNamespaceURI(String prefix) {
        return getCurrentElement().getNamespace(prefix).getURI();
    }

    public String getAttributeValue(String ns, String local) {
        return getCurrentElement().getAttributeValue(local, Namespace.getNamespace(ns));
    }

    public int getAttributeCount() {
        return getCurrentElement().getAttributes().size();
    }

    Attribute getAttribute(int i) {
        return (Attribute)getCurrentElement().getAttributes().get(i);
    }

    public QName getAttributeName(int i) {
        Attribute at = getAttribute(i);

        return new QName(at.getNamespaceURI(), at.getName(), at.getNamespacePrefix());
    }

    public String getAttributeNamespace(int i) {
        return getAttribute(i).getNamespaceURI();
    }

    public String getAttributeLocalName(int i) {
        return getAttribute(i).getName();
    }

    public String getAttributePrefix(int i) {
        return getAttribute(i).getNamespacePrefix();
    }

    public String getAttributeType(int i) {
        return toStaxType(getAttribute(i).getAttributeType());
    }

    public String getAttributeValue(int i) {
        return getAttribute(i).getValue();
    }

    public boolean isAttributeSpecified(int i) {
        return getAttribute(i).getValue() != null;
    }

    public int getNamespaceCount() {
        return namespaces.size();
    }

    Namespace getNamespace(int i) {
        return namespaces.get(i);
    }

    public String getNamespacePrefix(int i) {
        return getNamespace(i).getPrefix();
    }

    public String getNamespaceURI(int i) {
        return getNamespace(i).getURI();
    }

    public NamespaceContext getNamespaceContext() {
        return namespaceContext;
    }

    public String getText() {
        return content.getValue();
    }

    public char[] getTextCharacters() {
        return getText().toCharArray();
    }

    public int getTextStart() {
        return 0;
    }

    public int getTextLength() {
        return getText().length();
    }

    public String getEncoding() {
        return null;
    }

    public QName getName() {
        Element el = getCurrentElement();

        return new QName(el.getNamespaceURI(), el.getName(), el.getNamespacePrefix());
    }

    public String getLocalName() {
        return getCurrentElement().getName();
    }

    public String getNamespaceURI() {
        return getCurrentElement().getNamespaceURI();
    }

    public String getPrefix() {
        return getCurrentElement().getNamespacePrefix();
    }

    public String getPITarget() {
        throw new UnsupportedOperationException();
    }

    public String getPIData() {
        throw new UnsupportedOperationException();
    }
}

Other Apache CXF examples (source code examples)

Here is a short list of links related to this Apache CXF JDOMStreamReader.java source code file:

... this post is sponsored by my books ...

#1 New Release!

FP Best Seller

 

new blog posts

 

Copyright 1998-2021 Alvin Alexander, alvinalexander.com
All Rights Reserved.

A percentage of advertising revenue from
pages under the /java/jwarehouse URI on this website is
paid back to open source projects.