| /* |
| * Copyright (c) 2003 The Visigoth Software Society. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, if |
| * any, must include the following acknowledgement: |
| * "This product includes software developed by the |
| * Visigoth Software Society (http://www.visigoths.org/)." |
| * Alternately, this acknowledgement may appear in the software itself, |
| * if and wherever such third-party acknowledgements normally appear. |
| * |
| * 4. Neither the name "FreeMarker", "Visigoth", nor any of the names of the |
| * project contributors may be used to endorse or promote products derived |
| * from this software without prior written permission. For written |
| * permission, please contact visigoths@visigoths.org. |
| * |
| * 5. Products derived from this software may not be called "FreeMarker" or "Visigoth" |
| * nor may "FreeMarker" or "Visigoth" appear in their names |
| * without prior written permission of the Visigoth Software Society. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE VISIGOTH SOFTWARE SOCIETY OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Visigoth Software Society. For more |
| * information on the Visigoth Software Society, please see |
| * http://www.visigoths.org/ |
| */ |
| |
| package freemarker.core; |
| |
| import java.io.IOException; |
| |
| import freemarker.template.SimpleSequence; |
| import freemarker.template.TemplateException; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateNodeModel; |
| import freemarker.template.TemplateScalarModel; |
| import freemarker.template.TemplateSequenceModel; |
| |
| |
| /** |
| * An instruction to visit an XML node. |
| */ |
| final class VisitNode extends TemplateElement { |
| |
| Expression targetNode, namespaces; |
| |
| VisitNode(Expression targetNode, Expression namespaces) { |
| this.targetNode = targetNode; |
| this.namespaces = namespaces; |
| } |
| |
| void accept(Environment env) throws IOException, TemplateException { |
| TemplateModel node = targetNode.eval(env); |
| if (!(node instanceof TemplateNodeModel)) { |
| throw new UnexpectedTypeException(targetNode, node, "node", env); |
| } |
| |
| TemplateModel nss = namespaces == null ? null : namespaces.eval(env); |
| if (namespaces instanceof StringLiteral) { |
| nss = env.importLib(((TemplateScalarModel) nss).getAsString(), null); |
| } |
| else if (namespaces instanceof ListLiteral) { |
| nss = ((ListLiteral) namespaces).evaluateStringsToNamespaces(env); |
| } |
| if (nss != null) { |
| if (nss instanceof Environment.Namespace) { |
| SimpleSequence ss = new SimpleSequence(1); |
| ss.add(nss); |
| nss = ss; |
| } |
| else if (!(nss instanceof TemplateSequenceModel)) { |
| if (namespaces != null) { |
| throw new UnexpectedTypeException(namespaces, nss, "sequence", env); |
| } else { |
| // Should not occur |
| throw new _MiscTemplateException(env, "Expecting a sequence of namespaces after \"using\""); |
| } |
| } |
| } |
| env.visit((TemplateNodeModel) node, (TemplateSequenceModel) nss); |
| } |
| |
| protected String dump(boolean canonical) { |
| StringBuffer sb = new StringBuffer(); |
| if (canonical) sb.append('<'); |
| sb.append(getNodeTypeSymbol()); |
| sb.append(' '); |
| sb.append(targetNode.getCanonicalForm()); |
| if (namespaces != null) { |
| sb.append(" using "); |
| sb.append(namespaces.getCanonicalForm()); |
| } |
| if (canonical) sb.append("/>"); |
| return sb.toString(); |
| } |
| |
| String getNodeTypeSymbol() { |
| return "#visit"; |
| } |
| |
| int getParameterCount() { |
| return 2; |
| } |
| |
| Object getParameterValue(int idx) { |
| switch (idx) { |
| case 0: return targetNode; |
| case 1: return namespaces; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| ParameterRole getParameterRole(int idx) { |
| switch (idx) { |
| case 0: return ParameterRole.NODE; |
| case 1: return ParameterRole.NAMESPACE; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| } |