package org.drools.spring.metadata.annotation.java;
/*
* Copyright 2005 (C) The Werken Company. All Rights Reserved.
*
* Redistribution and use of this software and associated documentation
* ("Software"), with or without modification, are permitted provided that the
* following conditions are met:
*
* 1. Redistributions of source code must retain copyright statements and
* notices. Redistributions must also contain a copy of this document.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. The name "drools" must not be used to endorse or promote products derived
* from this Software without prior written permission of The Werken Company.
* For written permission, please contact bob@werken.com.
*
* 4. Products derived from this Software may not be called "drools" nor may
* "drools" appear in their names without prior written permission of The Werken
* Company. "drools" is a registered trademark of The Werken Company.
*
* 5. Due credit should be given to The Werken Company.
* (http://drools.werken.com/).
*
* THIS SOFTWARE IS PROVIDED BY THE WERKEN COMPANY AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE WERKEN COMPANY OR ITS CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
import org.drools.spring.metadata.BasicRuleMetadata;
import org.drools.spring.metadata.RuleMetadata;
import org.drools.spring.metadata.RuleMetadataSource;
public class AnnotationRuleMetadataSource implements RuleMetadataSource {
public RuleMetadata getRuleMetadata(Class pojoClass) {
Rule ruleAnnotation = ((Class<?>)pojoClass).getAnnotation(Rule.class);
if (ruleAnnotation == null) {
return null;
}
if (isAllValuesDefaulted(ruleAnnotation)) {
return null;
}
if (ruleAnnotation.value().length() > 0) {
return createRuleMetadataFromDefaultValue(ruleAnnotation);
} else {
return createRuleMetadataFromNamedValues(
pojoClass, ruleAnnotation);
}
}
private boolean isAllValuesDefaulted(Rule ruleAnnotation) {
return ruleAnnotation.value().length() == 0
&& ruleAnnotation.value().length() == 0
&& ruleAnnotation.name().length() == 0
&& ruleAnnotation.documentation().length() == 0
&& ruleAnnotation.salience() == Integer.MIN_VALUE
&& ruleAnnotation.duration() == Long.MIN_VALUE
&& ruleAnnotation.loop() == Rule.Loop.DEFAULT;
}
private RuleMetadata createRuleMetadataFromDefaultValue(Rule ruleAnnotation) {
BasicRuleMetadata metadata = new BasicRuleMetadata();
metadata.setName(ruleAnnotation.value());
return metadata;
}
/*
* This code is ugly because JSR-175 does not allow null values, thus we are
* forced to use sentinal values.
*/
private RuleMetadata createRuleMetadataFromNamedValues(Class pojoClass, Rule ruleAnnotation) {
BasicRuleMetadata metadata = new BasicRuleMetadata();
if (ruleAnnotation.name().length() > 0) {
metadata.setName(ruleAnnotation.name());
} else {
metadata.setName(pojoClass.getName());
}
if (ruleAnnotation.documentation().length() > 0) {
metadata.setDocumentation(ruleAnnotation.documentation());
}
if (ruleAnnotation.salience() != Integer.MIN_VALUE) {
metadata.setSalience(ruleAnnotation.salience());
}
if (ruleAnnotation.duration() != Long.MIN_VALUE) {
metadata.setDuration(ruleAnnotation.duration());
}
if (ruleAnnotation.loop() != Rule.Loop.DEFAULT) {
metadata.setNoLoop(ruleAnnotation.loop().getValue());
}
return metadata;
}
}