001: /*
002: * $Id: EmptyNamespaceContext.java,v 1.2 2004/07/08 14:29:42 cniles Exp $
003: *
004: * Copyright (c) 2004, Christian Niles, unit12.net
005: * All rights reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions are met:
009: *
010: * * Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * * Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in the
015: * documentation and/or other materials provided with the distribution.
016: *
017: * * Neither the name of Christian Niles, Unit12, nor the names of its
018: * contributors may be used to endorse or promote products derived from
019: * this software without specific prior written permission.
020: *
021: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
022: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
023: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
024: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
025: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
026: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
027: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
028: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
029: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
030: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
031: * POSSIBILITY OF SUCH DAMAGE.
032: *
033: */
034: package javanet.staxutils;
035:
036: import java.util.Collections;
037: import java.util.Iterator;
038:
039: import javax.xml.namespace.NamespaceContext;
040:
041: /**
042: * {@link ExtendedNamespaceContext} that contains no namespaces.
043: *
044: * @author Christian Niles
045: * @version $Revision: 1.2 $
046: */
047: public final class EmptyNamespaceContext implements
048: ExtendedNamespaceContext, StaticNamespaceContext {
049:
050: public static final EmptyNamespaceContext INSTANCE = new EmptyNamespaceContext();
051:
052: public static final NamespaceContext getInstance() {
053:
054: return INSTANCE;
055:
056: }
057:
058: public String getNamespaceURI(String prefix) {
059:
060: return null;
061:
062: }
063:
064: public String getPrefix(String nsURI) {
065:
066: return null;
067:
068: }
069:
070: public Iterator getPrefixes(String nsURI) {
071:
072: return Collections.EMPTY_SET.iterator();
073:
074: }
075:
076: public NamespaceContext getParent() {
077:
078: return null;
079:
080: }
081:
082: public boolean isPrefixDeclared(String prefix) {
083:
084: return false;
085:
086: }
087:
088: public Iterator getPrefixes() {
089:
090: return Collections.EMPTY_LIST.iterator();
091:
092: }
093:
094: public Iterator getDeclaredPrefixes() {
095:
096: return Collections.EMPTY_LIST.iterator();
097:
098: }
099:
100: }
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