/* * 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)); } } }