applicationdataargument.java

drools 一个开放源码的规则引擎

package org.drools.spring.pojorule;

/*
 * Copyright 2005 (C) The Werken Company. All Rights Reserved.
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 * notices. Redistributions must also contain a copy of this document.
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 * (http://drools.werken.com/).
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import org.drools.spi.Tuple;

public class ApplicationDataArgument implements Argument {

    private final String name;
    private final Class clazz;

    public ApplicationDataArgument(String name, Class clazz) {
        this.name = name;
        this.clazz = clazz;
    }

    public Object getValue(Tuple tuple) {
        Object value = tuple.getWorkingMemory().getApplicationData(name);
        if (!clazz.isAssignableFrom(value.getClass())) {
            throw new IllegalStateException("Application data class different than declaration"
                    + ": app-data-name = " + name + ", expected class = " + clazz
                    + ", actual class = " + value.getClass());
        }
        return value;
    }

    public String getDataName() {
        return name;
    }

    public Class getDataClass() {
        return clazz;
    }
}