| /* |
| * 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.io.StringReader; |
| import java.util.List; |
| |
| import org.apache.avalon.framework.activity.Disposable; |
| import org.apache.avalon.framework.logger.AbstractLogEnabled; |
| import org.apache.avalon.framework.service.ServiceException; |
| import org.apache.avalon.framework.service.ServiceManager; |
| import org.apache.avalon.framework.service.Serviceable; |
| import org.apache.avalon.framework.thread.ThreadSafe; |
| import org.apache.cocoon.components.expression.ExpressionFactory; |
| import org.apache.cocoon.template.environment.ErrorHolder; |
| import org.xml.sax.Locator; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXParseException; |
| |
| public abstract class AbstractStringTemplateParser |
| extends AbstractLogEnabled |
| implements Serviceable, Disposable, ThreadSafe, StringTemplateParser { |
| |
| private ServiceManager manager; |
| private ExpressionFactory expressionFactory; |
| |
| /** |
| * @see org.apache.avalon.framework.service.Serviceable#service(org.apache.avalon.framework.service.ServiceManager) |
| */ |
| public void service(ServiceManager manager) throws ServiceException { |
| this.manager = manager; |
| this.expressionFactory = (ExpressionFactory) this.manager.lookup(ExpressionFactory.ROLE); |
| } |
| |
| /** |
| * @see org.apache.avalon.framework.activity.Disposable#dispose() |
| */ |
| public void dispose() { |
| if ( this.manager != null ) { |
| this.manager.release(this.expressionFactory); |
| this.manager = null; |
| this.expressionFactory = null; |
| } |
| } |
| |
| protected JXTExpression compile(final String expression) throws Exception { |
| return new JXTExpression(expression, this.expressionFactory.getExpression(expression)); |
| } |
| |
| protected JXTExpression compile(final String expression, String language) throws Exception { |
| return new JXTExpression(expression, this.expressionFactory.getExpression(language, expression)); |
| } |
| |
| /** |
| * @see org.apache.cocoon.template.expression.StringTemplateParser#compileBoolean(java.lang.String, java.lang.String, org.xml.sax.Locator) |
| */ |
| public JXTExpression compileBoolean(String val, String msg, Locator location) throws SAXException { |
| JXTExpression res = compileExpr(val, msg, location); |
| if (res != null && res.getCompiledExpression() == null && res.getRaw() != null) { |
| res.setCompiledExpression(Boolean.valueOf(res.getRaw())); |
| } |
| return res; |
| } |
| |
| /** |
| * @see org.apache.cocoon.template.expression.StringTemplateParser#compileInt(java.lang.String, java.lang.String, org.xml.sax.Locator) |
| */ |
| public JXTExpression compileInt(String val, String msg, Locator location) throws SAXException { |
| JXTExpression res = compileExpr(val, msg, location); |
| if (res != null && res.getCompiledExpression() == null && res.getRaw() != null) { |
| res.setCompiledExpression(Integer.valueOf(res.getRaw())); |
| } |
| return res; |
| } |
| |
| /** |
| * @see org.apache.cocoon.template.expression.StringTemplateParser#compileExpr(java.lang.String, java.lang.String, org.xml.sax.Locator) |
| */ |
| public JXTExpression compileExpr(String inStr, String errorPrefix, Locator location) throws SAXParseException { |
| if (inStr == null) { |
| return null; |
| } |
| StringReader in = new StringReader(inStr.trim()); |
| List substitutions = parseSubstitutions(in, errorPrefix, location); |
| if (substitutions.size() == 0 || !(substitutions.get(0) instanceof JXTExpression)) |
| return new JXTExpression(inStr, null); |
| |
| return (JXTExpression) substitutions.get(0); |
| } |
| |
| /** |
| * @see org.apache.cocoon.template.expression.StringTemplateParser#parseSubstitutions(java.io.Reader, java.lang.String, org.xml.sax.Locator) |
| */ |
| public List parseSubstitutions(Reader in, String errorPrefix, Locator location) throws SAXParseException { |
| try { |
| return parseSubstitutions(in); |
| } catch (Exception exc) { |
| throw new SAXParseException(errorPrefix + exc.getMessage(), location, exc); |
| } catch (Error err) { |
| throw new SAXParseException(errorPrefix + err.getMessage(), location, new ErrorHolder(err)); |
| } |
| } |
| } |