org.springframework.ldap.filter.NotFilter Maven / Gradle / Ivy
/*
* Copyright 2005-2010 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.springframework.ldap.filter;
import org.apache.commons.lang.Validate;
import org.apache.commons.lang.builder.EqualsBuilder;
/**
* A filter for 'not'. The following code:
*
*
* Filter filter = new NotFilter(new EqualsFilter("cn", "foo");
* System.out.println(filter.encode());
*
*
* would result in:
*
*
* (!(cn = foo))
*
*
* @author Adam Skogman
*/
public class NotFilter extends AbstractFilter {
private final Filter filter;
static private final int HASH = "!".hashCode();
/**
* Create a filter that negates the outcome of the given filter
.
*
* @param filter The filter that should be negated.
*/
public NotFilter(Filter filter) {
Validate.notNull(filter);
this.filter = filter;
}
/*
* @see org.springframework.ldap.filter.AbstractFilter#encode(java.lang.StringBuffer)
*/
public StringBuffer encode(StringBuffer buff) {
buff.append("(!");
filter.encode(buff);
buff.append(')');
return buff;
}
/*
* @see java.lang.Object#equals(java.lang.Object)
*/
public boolean equals(Object o) {
if (o == null) {
return false;
}
if (o == this) {
return true;
}
if (o.getClass() != getClass()) {
return false;
}
NotFilter f = (NotFilter) o;
return new EqualsBuilder().append(this.filter, f.filter).isEquals();
}
/*
* @see java.lang.Object#hashCode()
*/
public int hashCode() {
return HASH ^ filter.hashCode();
}
}