001: /*
002: * Copyright (c) 2003 The Visigoth Software Society. All rights
003: * reserved.
004: *
005: * Redistribution and use in source and binary forms, with or without
006: * modification, are permitted provided that the following conditions
007: * are met:
008: *
009: * 1. Redistributions of source code must retain the above copyright
010: * notice, this list of conditions and the following disclaimer.
011: *
012: * 2. Redistributions in binary form must reproduce the above copyright
013: * notice, this list of conditions and the following disclaimer in
014: * the documentation and/or other materials provided with the
015: * distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowledgement:
019: * "This product includes software developed by the
020: * Visigoth Software Society (http://www.visigoths.org/)."
021: * Alternately, this acknowledgement may appear in the software itself,
022: * if and wherever such third-party acknowledgements normally appear.
023: *
024: * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the
025: * project contributors may be used to endorse or promote products derived
026: * from this software without prior written permission. For written
027: * permission, please contact visigoths@visigoths.org.
028: *
029: * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth"
030: * nor may "FreeMarker" or "Visigoth" appear in their names
031: * without prior written permission of the Visigoth Software Society.
032: *
033: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
034: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
035: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
036: * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR
037: * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
038: * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
039: * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
040: * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
041: * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
042: * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
043: * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
044: * SUCH DAMAGE.
045: * ====================================================================
046: *
047: * This software consists of voluntary contributions made by many
048: * individuals on behalf of the Visigoth Software Society. For more
049: * information on the Visigoth Software Society, please see
050: * http://www.visigoths.org/
051: */
052:
053: package freemarker.ext.xml;
054:
055: import freemarker.template.TemplateMethodModel;
056: import java.lang.String;
057: import java.util.List;
058: import freemarker.template.TemplateScalarModel;
059: import freemarker.template.TemplateModelException;
060: import java.util.HashMap;
061:
062: /**
063: * @author Attila Szegedi
064: * @version $Id: Namespaces.java,v 1.4 2003/10/13 11:57:50 szegedia Exp $
065: */
066: class Namespaces implements TemplateMethodModel, Cloneable {
067: static final Factory FACTORY = new Factory() {
068: public Namespaces create() {
069: return new Namespaces();
070: }
071: };
072:
073: private HashMap namespaces;
074: private boolean shared;
075:
076: Namespaces() {
077: namespaces = new HashMap();
078: namespaces.put("", "");
079: namespaces.put("xml", "http://www.w3.org/XML/1998/namespace");
080: shared = false;
081: }
082:
083: public Object clone() {
084: try {
085: Namespaces clone = (Namespaces) super .clone();
086: clone.namespaces = (HashMap) namespaces.clone();
087: clone.shared = false;
088: return clone;
089: } catch (CloneNotSupportedException e) {
090: throw new Error(); // Cannot happen
091: }
092: }
093:
094: public String translateNamespacePrefixToUri(String prefix) {
095: synchronized (namespaces) {
096: return (String) namespaces.get(prefix);
097: }
098: }
099:
100: public Object exec(List arguments) throws TemplateModelException {
101: if (arguments.size() != 2) {
102: throw new TemplateModelException(
103: "_registerNamespace(prefix, uri) requires two arguments");
104: }
105: registerNamespace((String) arguments.get(0), (String) arguments
106: .get(1));
107: return TemplateScalarModel.EMPTY_STRING;
108: }
109:
110: void registerNamespace(String prefix, String uri) {
111: synchronized (namespaces) {
112: namespaces.put(prefix, uri);
113: }
114: }
115:
116: void markShared() {
117: if (!shared) {
118: shared = true;
119: }
120: }
121:
122: boolean isShared() {
123: return shared;
124: }
125:
126: interface Factory {
127: Namespaces create();
128: }
129:
130: }
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