/*
* 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));
}
}
}