namematchmethodmetadatasource.java

drools 一个开放源码的规则引擎

package org.drools.spring.metadata;

/*
 * 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,
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 * 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 [e-mail].
 *
 * 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
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import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

public class NameMatchMethodMetadataSource implements MethodMetadataSource{

    static final MethodMetadata METHOD_CONDITION_METADATA = new MethodMetadata(MethodMetadata.METHOD_CONDITION);
    static final MethodMetadata METHOD_CONSEQUENCE_METADATA = new MethodMetadata(MethodMetadata.METHOD_CONSEQUENCE);
    static final MethodMetadata OBJECT_CONDITION_METADATA = new MethodMetadata(MethodMetadata.OBJECT_CONDITION);
    
    private Map nameMap = new HashMap(); // Map<String methodName, MetadataInfo>

    public MethodMetadata getMethodMetadata(Method method) {
        return (MethodMetadata) nameMap.get(method.getName());
    }

    /**
     * Set the map of name to RuleMethodAttributes. The methodName keys must match
     * the value returned by Method.getName(). Overloaded methods are not explicity
     * supported. eg:
     *
     * </pre>
     * public class PojoRule {
     *     public boolean conditionOne(..) {...}
     *     public boolean conditionTwo(..) {...}
     *     public void consequence(..) {...}
     * }
     *
     * Map nameMap = new HashMap();
     * nameMap.put("conditionOne", new RuleMethodAttributes(RuleMethodAttributes.CONDITION));
     * nameMap.put("conditionTwo", new RuleMethodAttributes(RuleMethodAttributes.CONDITION));
     * nameMap.put("consequence", new RuleMethodAttributes(RuleMethodAttributes.CONSEQUENCE));
     *
     * source.setNameMap(nameMap);
     * </pre>
     *
     * @param nameMap Map<String methodName, RuleMethodAttributes attributes>
     */
    public void setNameMap(Map nameMap) {
        this.nameMap = nameMap;
    }

}