| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| 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; |
| } |
| |
| @Override |
| TemplateElement[] accept(Environment env) throws IOException, TemplateException { |
| TemplateModel node = targetNode.eval(env); |
| if (!(node instanceof TemplateNodeModel)) { |
| throw new NonNodeException(targetNode, 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 NonSequenceException(namespaces, nss, env); |
| } else { |
| // Should not occur |
| throw new _MiscTemplateException(env, "Expecting a sequence of namespaces after \"using\""); |
| } |
| } |
| } |
| env.invokeNodeHandlerFor((TemplateNodeModel) node, (TemplateSequenceModel) nss); |
| return null; |
| } |
| |
| @Override |
| protected String dump(boolean canonical) { |
| StringBuilder sb = new StringBuilder(); |
| 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(); |
| } |
| |
| @Override |
| String getNodeTypeSymbol() { |
| return "#visit"; |
| } |
| |
| @Override |
| int getParameterCount() { |
| return 2; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| switch (idx) { |
| case 0: return targetNode; |
| case 1: return namespaces; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| switch (idx) { |
| case 0: return ParameterRole.NODE; |
| case 1: return ParameterRole.NAMESPACE; |
| default: throw new IndexOutOfBoundsException(); |
| } |
| } |
| |
| @Override |
| boolean isNestedBlockRepeater() { |
| return true; |
| } |
| |
| @Override |
| boolean isShownInStackTrace() { |
| return true; |
| } |
| |
| } |