org.apache.axis2.util.StreamWrapper Maven / Gradle / Ivy
/*
* 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.axis2.util;
import javax.xml.namespace.NamespaceContext;
import javax.xml.namespace.QName;
import javax.xml.stream.Location;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamReader;
public class StreamWrapper implements XMLStreamReader {
private static final int STATE_SWITCHED = 0;
private static final int STATE_INIT = 1;
private static final int STATE_SWITCH_AT_NEXT = 2;
private static final int STATE_COMPLETE_AT_NEXT = 3;
private static final int STATE_COMPLETED = 4;
private XMLStreamReader realReader = null;
private int state = STATE_INIT;
private int prevState = state;
public StreamWrapper(XMLStreamReader realReader) {
if (realReader == null) {
throw new UnsupportedOperationException("Reader cannot be null");
}
this.realReader = realReader;
}
public void close() throws XMLStreamException {
if (state != STATE_INIT) {
realReader.close();
} else {
throw new XMLStreamException();
}
}
public int next() throws XMLStreamException {
prevState = state;
int returnEvent = -1;
switch (state) {
case STATE_INIT:
if (realReader.getEventType() == START_DOCUMENT) {
state = STATE_SWITCHED;
returnEvent = realReader.next();
} else {
state = STATE_SWITCHED;
returnEvent = realReader.getEventType();
}
break;
case STATE_SWITCHED:
returnEvent = realReader.next();
if (returnEvent == END_DOCUMENT) {
state = STATE_COMPLETED;
} else if (!realReader.hasNext()) {
state = STATE_COMPLETE_AT_NEXT;
}
break;
// case STATE_SWITCH_AT_NEXT:
// state = STATE_SWITCHED;
// returnEvent = realReader.getEventType();
// break;
case STATE_COMPLETE_AT_NEXT:
state = STATE_COMPLETED;
returnEvent = END_DOCUMENT;
break;
case STATE_COMPLETED:
//oops - no way we can go beyond this
throw new XMLStreamException("end reached!");
default:
throw new UnsupportedOperationException();
}
return returnEvent;
}
public int nextTag() throws XMLStreamException {
if (prevState != STATE_INIT) {
return realReader.nextTag();
} else {
throw new XMLStreamException();
}
}
public void require(int i, String s, String s1) throws XMLStreamException {
if (state != STATE_INIT) {
realReader.require(i, s, s1);
}
}
public boolean standaloneSet() {
if (state != STATE_INIT) {
return realReader.standaloneSet();
} else {
return false;
}
}
public int getAttributeCount() {
if (state != STATE_INIT) {
return realReader.getAttributeCount();
} else {
return 0;
}
}
public String getAttributeLocalName(int i) {
if (state != STATE_INIT) {
return realReader.getAttributeLocalName(i);
} else {
return null;
}
}
public QName getAttributeName(int i) {
if (state != STATE_INIT) {
return realReader.getAttributeName(i);
} else {
return null;
}
}
public String getAttributeNamespace(int i) {
if (state != STATE_INIT) {
return realReader.getAttributeNamespace(i);
} else {
return null;
}
}
public String getAttributePrefix(int i) {
if (state != STATE_INIT) {
return realReader.getAttributePrefix(i);
} else {
return null;
}
}
public String getAttributeType(int i) {
if (state != STATE_INIT) {
return realReader.getAttributeType(i);
} else {
return null;
}
}
public String getAttributeValue(int i) {
if (state != STATE_INIT) {
return realReader.getAttributeValue(i);
} else {
return null;
}
}
public String getAttributeValue(String s, String s1) {
if (state != STATE_INIT) {
return realReader.getAttributeValue(s, s1);
} else {
return null;
}
}
public String getCharacterEncodingScheme() {
if (state != STATE_INIT) {
return realReader.getCharacterEncodingScheme();
} else {
return null;
}
}
public String getElementText() throws XMLStreamException {
if (state != STATE_INIT) {
return realReader.getElementText();
} else {
throw new XMLStreamException();
}
}
public String getEncoding() {
if (state != STATE_INIT) {
return realReader.getEncoding();
} else {
return null;
}
}
public int getEventType() {
if (state == STATE_INIT) {
return START_DOCUMENT;
} else {
return realReader.getEventType();
}
}
public String getLocalName() {
if (state != STATE_INIT) {
return realReader.getLocalName();
} else {
return null;
}
}
public Location getLocation() {
if (state != STATE_INIT) {
return realReader.getLocation();
} else {
return null;
}
}
public QName getName() {
if (state != STATE_INIT) {
return realReader.getName();
} else {
return null;
}
}
public NamespaceContext getNamespaceContext() {
if (state != STATE_INIT) {
return realReader.getNamespaceContext();
} else {
return null;
}
}
public int getNamespaceCount() {
if (state != STATE_INIT) {
return realReader.getNamespaceCount();
} else {
return 0;
}
}
public String getNamespacePrefix(int i) {
if (state != STATE_INIT) {
return realReader.getNamespacePrefix(i);
} else {
return null;
}
}
public String getNamespaceURI() {
if (state != STATE_INIT) {
return realReader.getNamespaceURI();
} else {
return null;
}
}
public String getNamespaceURI(int i) {
if (state != STATE_INIT) {
return realReader.getNamespaceURI(i);
} else {
return null;
}
}
public String getNamespaceURI(String s) {
if (state != STATE_INIT) {
return realReader.getNamespaceURI(s);
} else {
return null;
}
}
public String getPIData() {
if (state != STATE_INIT) {
return realReader.getPIData();
} else {
return null;
}
}
public String getPITarget() {
if (state != STATE_INIT) {
return realReader.getPITarget();
} else {
return null;
}
}
public String getPrefix() {
if (state != STATE_INIT) {
return realReader.getPrefix();
} else {
return null;
}
}
public Object getProperty(String s) throws IllegalArgumentException {
return realReader.getProperty(s);
}
public String getText() {
if (state != STATE_INIT) {
return realReader.getText();
} else {
return null;
}
}
public char[] getTextCharacters() {
if (state != STATE_INIT) {
return realReader.getTextCharacters();
} else {
return new char[0];
}
}
public int getTextCharacters(int i, char[] chars, int i1, int i2) throws XMLStreamException {
if (state != STATE_INIT) {
return realReader.getTextCharacters(i, chars, i1, i2);
} else {
return 0;
}
}
public int getTextLength() {
if (state != STATE_INIT) {
return realReader.getTextLength();
} else {
return 0;
}
}
public int getTextStart() {
if (state != STATE_INIT) {
return realReader.getTextStart();
} else {
return 0;
}
}
public String getVersion() {
if (state != STATE_INIT) {
return realReader.getVersion();
} else {
return null;
}
}
public boolean hasName() {
if (state != STATE_INIT) {
return realReader.hasName();
} else {
return false;
}
}
public boolean hasNext() throws XMLStreamException {
if (state == STATE_COMPLETE_AT_NEXT) {
return true;
} else if (state == STATE_COMPLETED) {
return false;
} else if (state != STATE_INIT) {
return realReader.hasNext();
} else {
return true;
}
}
public boolean hasText() {
if (state != STATE_INIT) {
return realReader.hasText();
} else {
return false;
}
}
public boolean isAttributeSpecified(int i) {
if (state != STATE_INIT) {
return realReader.isAttributeSpecified(i);
} else {
return false;
}
}
public boolean isCharacters() {
if (state != STATE_INIT) {
return realReader.isCharacters();
} else {
return false;
}
}
public boolean isEndElement() {
if (state != STATE_INIT) {
return realReader.isEndElement();
} else {
return false;
}
}
public boolean isStandalone() {
if (state != STATE_INIT) {
return realReader.isStandalone();
} else {
return false;
}
}
public boolean isStartElement() {
if (state != STATE_INIT) {
return realReader.isStartElement();
} else {
return false;
}
}
public boolean isWhiteSpace() {
if (state != STATE_INIT) {
return realReader.isWhiteSpace();
} else {
return false;
}
}
}
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