| /* |
| * 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 org.apache.cocoon.template.expression; |
| |
| import java.io.Reader; |
| import java.util.LinkedList; |
| import java.util.List; |
| |
| /** |
| * @version $Id$ |
| */ |
| public class JXTGStringTemplateParser extends AbstractStringTemplateParser { |
| |
| public final static String JXPATH = "jxpath"; |
| public final static String JEXL = "jexl"; |
| public final static String JAVASCRIPT = "js"; |
| |
| /** |
| * @see org.apache.cocoon.template.expression.StringTemplateParser#parseSubstitutions(java.io.Reader) |
| */ |
| public List parseSubstitutions(Reader in) throws Exception { |
| LinkedList substitutions = new LinkedList(); |
| StringBuffer buf = new StringBuffer(); |
| buf.setLength(0); |
| int ch; |
| boolean inExpr = false; |
| String lang = null; |
| top: while ((ch = in.read()) != -1) { |
| // column++; |
| char c = (char) ch; |
| processChar: while (true) { |
| if (inExpr) { |
| if (c == '\\') { |
| ch = in.read(); |
| buf.append(ch == -1 ? '\\' : (char) ch); |
| } else if (c == '}') { |
| String str = buf.toString(); |
| substitutions.add(compile(str, lang)); |
| buf.setLength(0); |
| inExpr = false; |
| } else { |
| buf.append(c); |
| } |
| } else if (c == '$' || c == '#' || c == '@') { |
| ch = in.read(); |
| if (ch == '{') { |
| |
| lang = (c == '#') ? JXPATH : ((c == '$') ? JEXL : JAVASCRIPT); |
| inExpr = true; |
| if (buf.length() > 0) { |
| substitutions.add(new Literal(buf.toString())); |
| buf.setLength(0); |
| } |
| continue top; |
| } |
| buf.append(c); |
| if (ch != -1) { |
| c = (char) ch; |
| continue processChar; |
| } |
| } else { |
| buf.append(c); |
| } |
| break; |
| } |
| } |
| if (inExpr) |
| throw new Exception("Unterminated {"); |
| |
| if (buf.length() > 0) |
| substitutions.add(new Literal(buf.toString())); |
| return substitutions; |
| } |
| |
| } |