text: /*
   * Copyright (c) 2005, 2016, Oracle and/or its affiliates. All rights reserved.
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   *
   * This code is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License version 2 only, as
   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
   * by Oracle in the LICENSE file that accompanied this code.
   *
   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
   * or visit www.oracle.com if you need additional information or have any
   * questions.
   */
  
  package com.sun.xml.internal.stream.events;
  
  import com.sun.xml.internal.stream.util.ReadOnlyIterator;
  import java.util.ArrayList;
  import java.util.Collection;
  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.XMLStreamConstants;
  import javax.xml.stream.events.Attribute;
  import javax.xml.stream.events.Namespace;
  import javax.xml.stream.events.StartElement;
  
  /**
   * Implementation of StartElementEvent.
   *
   * @author Neeraj Bajaj Sun Microsystems,Inc.
   * @author K.Venugopal Sun Microsystems,Inc.
   */
  public class StartElementEvent extends DummyEvent
          implements StartElement {
  
      private Map<QName, Attribute> fAttributes;
      private List<Namespace> fNamespaces;
      private NamespaceContext fNamespaceContext = null;
      private QName fQName;
  
      public StartElementEvent(String prefix, String uri, String localpart) {
          this(new QName(uri, localpart, prefix));
      }
  
      public StartElementEvent(QName qname) {
          fQName = qname;
          init();
      }
  
      public StartElementEvent(StartElement startelement) {
          this(startelement.getName());
          addAttributes(startelement.getAttributes());
          addNamespaceAttributes(startelement.getNamespaces());
      }
  
      protected final void init() {
          setEventType(XMLStreamConstants.START_ELEMENT);
          fAttributes = new HashMap<>();
          fNamespaces = new ArrayList<>();
      }
  
      @Override
      public QName getName() {
          return fQName;
      }
  
      public void setName(QName qname) {
          this.fQName = qname;
      }
  
      @Override
      public Iterator<Attribute> getAttributes() {
          if (fAttributes != null) {
              Collection<Attribute> coll = fAttributes.values();
              return new ReadOnlyIterator<>(coll.iterator());
          }
          return new ReadOnlyIterator<>();
      }
  
      @Override
      public Iterator<Namespace> getNamespaces() {
          if (fNamespaces != null) {
              return new ReadOnlyIterator<>(fNamespaces.iterator());
          }
          return new ReadOnlyIterator<>();
      }
  
      @Override
      public Attribute getAttributeByName(QName qname) {
          if (qname == null) {
              return null;
          }
          return fAttributes.get(qname);
      }
  
      public String getNamespace() {
          return fQName.getNamespaceURI();
      }
  
      @Override
      public String getNamespaceURI(String prefix) {
          //check that URI was supplied when creating this startElement event and prefix matches
          if (getNamespace() != null && fQName.getPrefix().equals(prefix)) {
              return getNamespace();
          }
          //else check the namespace context
          if (fNamespaceContext != null) {
              return fNamespaceContext.getNamespaceURI(prefix);
          }
          return null;
      }
  
      /**
       * <p>
       * Return a <code>String</code> representation of this
       * <code>StartElement</code> formatted as XML.</p>
       *
       * @return <code>String</code> representation of this
       * <code>StartElement</code> formatted as XML.
       */
      @Override
      public String toString() {
  
          StringBuilder startElement = new StringBuilder();
  
          // open element
          startElement.append("<");
          startElement.append(nameAsString());
  
          // add any attributes
          if (fAttributes != null) {
              Iterator<Attribute> it = this.getAttributes();
              Attribute attr;
              while (it.hasNext()) {
                  attr = it.next();
                  startElement.append(" ");
                  startElement.append(attr.toString());
              }
          }
  
          // add any namespaces
          if (fNamespaces != null) {
              Iterator<Namespace> it = fNamespaces.iterator();
              Namespace ns;
              while (it.hasNext()) {
                  ns = it.next();
                  startElement.append(" ");
                  startElement.append(ns.toString());
              }
          }
  
          // close start tag
          startElement.append(">");
  
          // return StartElement as a String
          return startElement.toString();
      }
  
      /**
       * Return this event as String
       *
       * @return String Event returned as string.
       */
      public String nameAsString() {
          if ("".equals(fQName.getNamespaceURI())) {
              return fQName.getLocalPart();
          }
          if (fQName.getPrefix() != null) {
              return "['" + fQName.getNamespaceURI() + "']:" + fQName.getPrefix()
                      + ":" + fQName.getLocalPart();
          } else {
              return "['" + fQName.getNamespaceURI() + "']:" + fQName.getLocalPart();
          }
      }
  
      /**
       * Gets a read-only namespace context. If no context is available this
       * method will return an empty namespace context. The NamespaceContext
       * contains information about all namespaces in scope for this StartElement.
       *
       * @return the current namespace context
       */
      @Override
      public NamespaceContext getNamespaceContext() {
          return fNamespaceContext;
      }
  
      public void setNamespaceContext(NamespaceContext nc) {
          fNamespaceContext = nc;
      }
  
      @Override
      protected void writeAsEncodedUnicodeEx(java.io.Writer writer)
              throws java.io.IOException {
          writer.write(toString());
      }
  
      void addAttribute(Attribute attr) {
          if (attr.isNamespace()) {
              fNamespaces.add((Namespace) attr);
          } else {
              fAttributes.put(attr.getName(), attr);
          }
      }
  
      final void addAttributes(Iterator<? extends Attribute> attrs) {
          if (attrs == null) {
              return;
          }
          while (attrs.hasNext()) {
              Attribute attr = attrs.next();
              fAttributes.put(attr.getName(), attr);
          }
      }
  
      void addNamespaceAttribute(Namespace attr) {
          if (attr == null) {
              return;
          }
          fNamespaces.add(attr);
      }
  
      final void addNamespaceAttributes(Iterator<? extends Namespace> attrs) {
          if (attrs == null) {
              return;
          }
          while (attrs.hasNext()) {
              Namespace attr = attrs.next();
              fNamespaces.add(attr);
          }
      }
  
  }
  