/*
* Copyright 2004-2005 the original author or authors.
*
* 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 org.springmodules.validation.valang.parser;
import java.util.HashMap;
import java.util.Map;
import org.springmodules.validation.util.context.BasicContextAware;
import org.springmodules.validation.valang.functions.FunctionDefinition;
/**
* A simple implementation of {@link ValangBased}.
*
* @author Uri Boness
*/
public class SimpleValangBased extends BasicContextAware implements ValangBased {
private Map customFunctions;
private Map dateParsers;
public SimpleValangBased() {
customFunctions = new HashMap();
dateParsers = new HashMap();
}
/**
* @see ValangBased#setCustomFunctions(java.util.Map)
*/
public void setCustomFunctions(Map functionByName) {
customFunctions = (functionByName != null) ? functionByName : new HashMap();
}
/**
* @see ValangBased#addCustomFunction(String, String)
*/
public void addCustomFunction(String functionName, String functionClassName) {
customFunctions.put(functionName, functionClassName);
}
/**
* @see ValangBased#setDateParsers(java.util.Map)
*/
public void setDateParsers(Map parserByRegexp) {
dateParsers = (parserByRegexp != null) ? parserByRegexp : new HashMap();
}
public Map getCustomFunctions() {
return customFunctions;
}
public Map getDateParsers() {
return dateParsers;
}
/**
* Creates a new {@link ValangParser} that is already configured with the proper custom functions and date
* parsers.
*
* @return A new {@link ValangParser}.
*/
public ValangParser createValangParser(String expression) {
ValangParser parser = new ValangParser(expression, getAllCustomFunctions(), dateParsers);
initLifecycle(parser.getVisitor());
return parser;
}
public void initValang(Object object) {
super.initLifecycle(object);
if (object instanceof ValangBased) {
((ValangBased) object).setCustomFunctions(customFunctions);
((ValangBased) object).setDateParsers(dateParsers);
}
}
/**
* Returns all the custom functions that can be found. This method returns all the custom functions
* that were explicitly registered with this instance and all custom functions that can be found in the
* application context (if one is set) by looking for {@link org.springmodules.validation.valang.functions.FunctionDefinition}
* beans.
*
* @return All the custom function that can be found.
*/
public Map getAllCustomFunctions() {
Map functionByName = new HashMap();
functionByName.putAll(customFunctions);
functionByName.putAll(findAllCustomFunctionsInApplicationContext());
return functionByName;
}
protected Map findAllCustomFunctionsInApplicationContext() {
Map functionByName = new HashMap();
if (applicationContext == null) {
return functionByName;
}
String[] names = applicationContext.getBeanNamesForType(FunctionDefinition.class);
for (int i = 0; i < names.length; i++) {
FunctionDefinition def = (FunctionDefinition) applicationContext.getBean(names[i]);
functionByName.put(def.getName(), def.getClassName());
}
return functionByName;
}
}