/*
* $Id: BaseTemplateEngine.java 651946 2008-04-27 13:41:38Z apetrelli $
*
* 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.struts2.components.template;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;
import com.opensymphony.xwork2.util.ClassLoaderUtil;
import com.opensymphony.xwork2.util.logging.Logger;
import com.opensymphony.xwork2.util.logging.LoggerFactory;
/**
* Base class for template engines.
*/
public abstract class BaseTemplateEngine implements TemplateEngine {
private static final Logger LOG = LoggerFactory.getLogger(BaseTemplateEngine.class);
/** The default theme properties file name. Default is 'theme.properties' */
public static final String DEFAULT_THEME_PROPERTIES_FILE_NAME = "theme.properties";
final Map<String, Properties> themeProps = new HashMap<String, Properties>();
public Map getThemeProps(Template template) {
synchronized (themeProps) {
Properties props = (Properties) themeProps.get(template.getTheme());
if (props == null) {
String propName = template.getDir() + "/" + template.getTheme() + "/"+getThemePropertiesFileName();
// WW-1292
// let's try getting it from the filesystem
File propFile = new File(propName);
InputStream is = null;
try {
if (propFile.exists()) {
is = new FileInputStream(propFile);
}
}
catch(FileNotFoundException e) {
LOG.warn("Unable to find file in filesystem ["+propFile.getAbsolutePath()+"]");
}
if (is == null) {
// if its not in filesystem. let's try the classpath
is = ClassLoaderUtil.getResourceAsStream(propName, getClass());
}
props = new Properties();
if (is != null) {
try {
props.load(is);
} catch (IOException e) {
LOG.error("Could not load " + propName, e);
} finally {
try {
is.close();
} catch(IOException io) {
LOG.warn("Unable to close input stream", io);
}
}
}
themeProps.put(template.getTheme(), props);
}
return props;
}
}
protected String getFinalTemplateName(Template template) {
String t = template.toString();
if (t.indexOf(".") <= 0) {
return t + "." + getSuffix();
}
return t;
}
protected String getThemePropertiesFileName() {
return DEFAULT_THEME_PROPERTIES_FILE_NAME;
}
protected abstract String getSuffix();
}
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