/*
* Copyright 2004 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.extremecomponents.util;
import java.util.*;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.collections.Predicate;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.extremecomponents.table.limit.Filter;
/**
* Use the Jakarta Collections predicate pattern to filter out the table.
*
* @author Jeff Johnston
*/
public final class FilterPredicate implements Predicate {
private static Log logger = LogFactory.getLog(FilterPredicate.class);
private List<Filter> filters;
public FilterPredicate(Filter filters[]) {
Assert.notNull(filters);
this.filters = Arrays.asList(filters);
}
public FilterPredicate(List<Filter> filters) {
Assert.notNull(filters);
this.filters = filters;
}
/**
* Use the filter parameters to filter out the table.
*/
public boolean evaluate(Object bean) {
boolean match = false;
try {
for (Iterator<Filter> iter = filters.iterator(); iter.hasNext();) {
Filter filter = iter.next();
String filterValue = filter.getValue();
if (StringUtils.isEmpty(filterValue)) {
continue;
}
String property = filter.getProperty();
Object value = PropertyUtils.getProperty(bean, property);
if (value == null) {
continue;
}
if (!isSearchMatch(value.toString(), filterValue)) {
match = false; // as soon as fail just short circuit
break;
}
match = true;
}
} catch (Exception e) {
logger.error("FilterPredicate.evaluate() had problems", e);
}
return match;
}
private boolean isSearchMatch(String value, String search) {
value = value.toLowerCase().trim();
search = search.toLowerCase().trim();
if (search.startsWith("*") && value.endsWith(StringUtils.replace(search, "*", ""))) {
return true;
} else if (search.endsWith("*") && value.startsWith(StringUtils.replace(search, "*", ""))) {
return true;
} else if (StringUtils.contains(value, search)) {
return true;
}
return false;
}
}