/*
* Copyright 2004, 2005, 2006 Odysseus Software GmbH
*
* Licensed 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 de.odysseus.calyxo.control.conf.impl;
import java.util.HashMap;
import java.util.Iterator;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.el.ELException;
import javax.servlet.jsp.el.Expression;
import javax.servlet.jsp.el.VariableResolver;
import de.odysseus.calyxo.base.ModuleContext;
import de.odysseus.calyxo.base.conf.ConfigException;
import de.odysseus.calyxo.base.misc.CalyxoVariableResolver;
import de.odysseus.calyxo.control.conf.ActionConfig;
import de.odysseus.calyxo.control.conf.DispatchConfig;
import de.odysseus.calyxo.control.conf.FilterConfig;
/**
*
* @author Christoph Beck
*/
public class FilterConfigImpl extends ParamsConfigImpl implements FilterConfig {
private String name;
private String className;
private String when;
private HashMap dispatches = new HashMap(4);
private Expression expression;
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_getElementName()
*/
protected String _getElementName() {
return "filter";
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_addChildren(de.odysseus.calyxo.base.conf.impl.ConfigImpl.Elements)
*/
protected void _addChildren(Elements list) {
super._addChildren(list);
list.add(getDispatchConfigs());
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_putAttributes(de.odysseus.calyxo.base.conf.impl.ConfigImpl.Attributes)
*/
protected void _putAttributes(Attributes map) {
super._putAttributes(map);
map.put("name", getName());
map.put("class", getClassName());
map.put("when", getWhen());
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_getDynamicAttributes()
*/
protected String[] _getDynamicAttributes() {
return new String[]{ "className", "when" };
}
/* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_evaluate(de.odysseus.calyxo.base.ModuleContext)
*/
protected void _evaluate(ModuleContext context) throws ConfigException {
super._evaluate(context);
if (when != null) {
try {
expression = context.getExpressionEvaluator().parseExpression("${" + when + "}", Boolean.class, this);
} catch (ELException e) {
throw new ConfigException("Failed to parse 'when' condition in filter '" + toInlineString() + "'");
}
}
}
/* (non-Javadoc)
* @see de.odysseus.calyxo.base.conf.impl.ConfigImpl#_init()
*/
protected void _init() throws ConfigException {
super._init();
// check that name xor class is specified
if ((name == null) == (className == null)) {
throw new ConfigException("Exactly one of name and class must be specified in filter '" + toInlineString() + "'");
}
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.FilterConfig#when(javax.servlet.http.HttpServletRequest)
*/
public boolean when(HttpServletRequest request) throws Exception {
if (expression == null) {
return true;
} else {
VariableResolver resolver = new CalyxoVariableResolver(request);
try {
Boolean result = (Boolean)expression.evaluate(resolver);
return result == null ? false : result.booleanValue();
} catch (ELException e) {
throw new ConfigException("Could not evaluate 'when' condition '" + when + "' in filter '" + toInlineString() + "'", e);
}
}
}
/* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.FilterConfig#getActionConfig()
*/
public ActionConfig getActionConfig() {
return (ActionConfig)_getParent();
}
/**
* Add dispatch element.
*/
public void add(DispatchConfigImpl value) throws ConfigException {
if (dispatches.containsKey(value.getName())) {
throw new ConfigException("Duplicate dispatch name '" + value.getName() + "' in " + toInlineString());
}
dispatches.put(value.getName(), value);
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.DispatchesConfig#getDispatchConfig(java.lang.String)
*/
public DispatchConfig getDispatchConfig(String name) {
return (DispatchConfig)dispatches.get(name);
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.DispatchesConfig#getDispatchConfigs()
*/
public Iterator getDispatchConfigs() {
return dispatches.values().iterator();
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.FilterConfig#getName()
*/
public String getName() {
return name;
}
/**
* Set name property
*/
public void setName(String string) {
name = string;
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.ActionConfig#getClassName()
*/
public String getClassName() {
return className;
}
/**
* Set filter class name
*/
public void setClassName(String string) {
className = string;
}
/*
* (non-Javadoc)
* @see de.odysseus.calyxo.control.conf.FilterConfig#getWhen()
*/
public String getWhen() {
return when;
}
/**
* Set when property
*/
public void setWhen(String string) {
when = string;
}
}