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.core;
054:
055: import freemarker.template.*;
056: import freemarker.template.utility.StringUtil;
057: import java.util.List;
058:
059: /**
060: * A holder for builtins that operate on TemplateNodeModels.
061: */
062:
063: abstract class NodeBuiltins {
064:
065: abstract static class NodeBuiltIn extends BuiltIn {
066: TemplateModel _getAsTemplateModel(Environment env)
067: throws TemplateException {
068: TemplateModel model = target.getAsTemplateModel(env);
069: if (!(model instanceof TemplateNodeModel)) {
070: throw invalidTypeException(model, target, env,
071: "node model");
072: }
073: return calculateResult((TemplateNodeModel) model, env);
074: }
075:
076: abstract TemplateModel calculateResult(
077: TemplateNodeModel nodeModel, Environment env)
078: throws TemplateModelException;
079: }
080:
081: static class ancestorsBI extends NodeBuiltIn {
082: TemplateModel calculateResult(TemplateNodeModel nodeModel,
083: Environment env) throws TemplateModelException {
084: AncestorSequence result = new AncestorSequence(env);
085: TemplateNodeModel parent = nodeModel.getParentNode();
086: while (parent != null) {
087: result.add(parent);
088: parent = parent.getParentNode();
089: }
090: return result;
091: }
092: }
093:
094: static class childrenBI extends NodeBuiltIn {
095: TemplateModel calculateResult(TemplateNodeModel nodeModel,
096: Environment env) throws TemplateModelException {
097: return nodeModel.getChildNodes();
098: }
099: }
100:
101: static class node_nameBI extends NodeBuiltIn {
102: TemplateModel calculateResult(TemplateNodeModel nodeModel,
103: Environment env) throws TemplateModelException {
104: return new SimpleScalar(nodeModel.getNodeName());
105: }
106: }
107:
108: static class node_typeBI extends NodeBuiltIn {
109: TemplateModel calculateResult(TemplateNodeModel nodeModel,
110: Environment env) throws TemplateModelException {
111: return new SimpleScalar(nodeModel.getNodeType());
112: }
113: }
114:
115: static class parentBI extends NodeBuiltIn {
116: TemplateModel calculateResult(TemplateNodeModel nodeModel,
117: Environment env) throws TemplateModelException {
118: return nodeModel.getParentNode();
119: }
120: }
121:
122: static class rootBI extends NodeBuiltIn {
123: TemplateModel calculateResult(TemplateNodeModel nodeModel,
124: Environment env) throws TemplateModelException {
125: TemplateNodeModel result = nodeModel;
126: TemplateNodeModel parent = nodeModel.getParentNode();
127: while (parent != null) {
128: result = parent;
129: parent = result.getParentNode();
130: }
131: return result;
132: }
133: }
134:
135: static class node_namespaceBI extends NodeBuiltIn {
136: TemplateModel calculateResult(TemplateNodeModel nodeModel,
137: Environment env) throws TemplateModelException {
138: String nsURI = nodeModel.getNodeNamespace();
139: return nsURI == null ? null : new SimpleScalar(nsURI);
140: }
141: }
142:
143: static class AncestorSequence extends SimpleSequence implements
144: TemplateMethodModel {
145:
146: private Environment env;
147:
148: AncestorSequence(Environment env) {
149: this .env = env;
150: }
151:
152: public Object exec(List names) throws TemplateModelException {
153: if (names == null || names.isEmpty()) {
154: return this ;
155: }
156: AncestorSequence result = new AncestorSequence(env);
157: for (int i = 0; i < size(); i++) {
158: TemplateNodeModel tnm = (TemplateNodeModel) get(i);
159: String nodeName = tnm.getNodeName();
160: String nsURI = tnm.getNodeNamespace();
161: if (nsURI == null) {
162: if (names.contains(nodeName)) {
163: result.add(tnm);
164: }
165: } else {
166: for (int j = 0; j < names.size(); j++) {
167: if (StringUtil.matchesName((String) names
168: .get(j), nodeName, nsURI, env)) {
169: result.add(tnm);
170: break;
171: }
172: }
173: }
174: }
175: return result;
176: }
177: }
178: }
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