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 java.io.IOException;
056: import freemarker.template.*;
057:
058: /**
059: * An instruction to visit the children of a node.
060: */
061: final class RecurseNode extends TemplateElement {
062:
063: Expression targetNode, namespaces;
064:
065: RecurseNode(Expression targetNode, Expression namespaces) {
066: this .targetNode = targetNode;
067: this .namespaces = namespaces;
068: }
069:
070: void accept(Environment env) throws IOException, TemplateException {
071: TemplateModel node = targetNode == null ? null : targetNode
072: .getAsTemplateModel(env);
073: TemplateModel nss = namespaces == null ? null : namespaces
074: .getAsTemplateModel(env);
075: if (namespaces instanceof StringLiteral) {
076: nss = env.importLib(((TemplateScalarModel) nss)
077: .getAsString(), null);
078: } else if (namespaces instanceof ListLiteral) {
079: nss = ((ListLiteral) namespaces)
080: .evaluateStringsToNamespaces(env);
081: }
082: if (node != null && !(node instanceof TemplateNodeModel)) {
083: throw new TemplateException(
084: "Expecting an XML node here, for expression: "
085: + targetNode + ", found a: "
086: + node.getClass().getName(), env);
087: }
088: if (nss != null) {
089: if (nss instanceof TemplateHashModel) {
090: SimpleSequence ss = new SimpleSequence(1);
091: ss.add(nss);
092: nss = ss;
093: } else if (!(nss instanceof TemplateSequenceModel)) {
094: throw new TemplateException(
095: "Expecting a sequence of namespaces after 'using'",
096: env);
097: }
098: }
099:
100: env.recurse((TemplateNodeModel) node,
101: (TemplateSequenceModel) nss);
102: }
103:
104: public String getCanonicalForm() {
105: String result = "<#recurse";
106: if (targetNode != null)
107: result += (" " + targetNode.getCanonicalForm());
108: if (namespaces != null)
109: result += (" using " + namespaces.getCanonicalForm());
110: return result + "/>";
111: }
112:
113: public String getDescription() {
114: return "recurse instruction";
115: }
116: }
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