/*
* 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.bean.conf.namespace;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.springframework.beans.factory.support.AbstractBeanDefinition;
import org.springframework.beans.factory.support.BeanDefinitionBuilder;
import org.springframework.beans.factory.xml.AbstractBeanDefinitionParser;
import org.springframework.beans.factory.xml.ParserContext;
import org.springframework.util.StringUtils;
import org.springmodules.validation.bean.conf.ValidationConfigurationException;
import org.springmodules.validation.util.cel.valang.ValangConditionExpressionParser;
import org.springmodules.validation.util.xml.DomUtils;
import org.w3c.dom.Element;
/**
* The {@link AbstractBeanDefinitionParser} to parser <valang-condition-parser> elements.
*
* @author Uri Boness
*/
public class ValangConditionParserDefinitionParser extends AbstractBeanDefinitionParser implements ValidationBeansParserConstants {
final static String ELEMENT_NAME = "valang-condition-parser";
private final static String FUNCTION_ELEMENT = "function";
private final static String NAME_ATTR = "name";
private final static String CLASS_ATTR = "class";
private final static String DATE_PARSER_ELEMENT = "date-parser";
private final static String REGEXP_ATTR = "regexp";
private final static String PATTERN_ATTR = "pattern";
protected AbstractBeanDefinition parseInternal(Element element, ParserContext parserContext) {
BeanDefinitionBuilder builder = BeanDefinitionBuilder.rootBeanDefinition(ValangConditionExpressionParser.class);
Map functionByName = new HashMap();
Map dateParsers = new HashMap();
for (Iterator elements = DomUtils.childElements(element); elements.hasNext();) {
Element child = (Element) elements.next();
if (isFunctionDefinition(child)) {
registerFunction(child, functionByName);
} else if (isDateParserDefinition(child)) {
registerDateParser(child, dateParsers);
} else {
throw new ValidationConfigurationException("unknown element '" + child.getTagName() + "'");
}
}
builder.addPropertyValue("customFunctions", functionByName);
builder.addPropertyValue("dateParsers", dateParsers);
return builder.getBeanDefinition();
}
//=============================================== Helper Methods ===================================================
protected boolean isFunctionDefinition(Element element) {
return VALIDATION_BEANS_NAMESPACE.equals(element.getNamespaceURI()) &&
FUNCTION_ELEMENT.equals(element.getLocalName());
}
protected void registerFunction(Element functionDefinition, Map functionByName) {
String name = functionDefinition.getAttribute(NAME_ATTR);
String className = functionDefinition.getAttribute(CLASS_ATTR);
if (!StringUtils.hasText(name) || !StringUtils.hasText(className)) {
throw new ValidationConfigurationException("Both '" + NAME_ATTR + "' and '" + CLASS_ATTR +
"' attributes of element '" + FUNCTION_ELEMENT + "' are required");
}
functionByName.put(name, className);
}
protected boolean isDateParserDefinition(Element element) {
return VALIDATION_BEANS_NAMESPACE.equals(element.getNamespaceURI()) &&
DATE_PARSER_ELEMENT.equals(element.getLocalName());
}
protected void registerDateParser(Element dateParserDefinition, Map patternByRegexp) {
String regexp = dateParserDefinition.getAttribute(REGEXP_ATTR);
String pattern = dateParserDefinition.getAttribute(PATTERN_ATTR);
if (!StringUtils.hasText(regexp) || !StringUtils.hasText(pattern)) {
throw new ValidationConfigurationException("Both '" + REGEXP_ATTR + "' and '" +
PATTERN_ATTR + "' attributes of element '" + DATE_PARSER_ELEMENT + "' are required");
}
patternByRegexp.put(regexp, pattern);
}
}