/**
* Copyright 2003-2010 Terracotta, Inc.
*
* 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 net.sf.ehcache.search.expression;
import java.util.Map;
import net.sf.ehcache.Element;
import net.sf.ehcache.search.SearchException;
import net.sf.ehcache.search.attribute.AttributeExtractor;
import net.sf.ehcache.search.attribute.AttributeType;
/**
* A comparison operator meaning Java "equals to" condition
*
* @author teck
*/
public class EqualTo extends BaseCriteria {
private final Object value;
private final String attributeName;
private final AttributeType type;
/**
* Constructor
*
* @param attributeName attribute name
* @param value
*/
public EqualTo(String attributeName, Object value) {
if (value == null || attributeName == null) {
throw new NullPointerException();
}
this.attributeName = attributeName;
this.value = value;
this.type = AttributeType.typeFor(attributeName, value);
}
/**
* Get attribute value.
*
* @return attribute value
*/
public Object getValue() {
return value;
}
/**
* Get attribute name.
*
* @return attribute name.
*/
public String getAttributeName() {
return attributeName;
}
/**
* Get attribute type.
*
* @return attribute type.
*/
public AttributeType getType() {
return type;
}
/**
* {@inheritDoc}
*/
public boolean execute(Element e, Map<String, AttributeExtractor> attributeExtractors) {
Object attributeValue = attributeExtractors.get(attributeName).attributeFor(e, getAttributeName());
if (attributeValue == null) {
return false;
} else {
AttributeType attrType = AttributeType.typeFor(getAttributeName(), attributeValue);
if (!getType().equals(attrType)) {
throw new SearchException("Expecting attribute of type " + getType().name() + " but was " + attrType.name());
}
if (getType().equals(AttributeType.STRING)) {
return ((String) this.value).equalsIgnoreCase((String) attributeValue);
} else {
return this.value.equals(attributeValue);
}
}
}
}