org.beangle.model.predicates.ValidEntityPredicate.java Source code

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Here is the source code for org.beangle.model.predicates.ValidEntityPredicate.java

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/* Copyright c 2005-2012.
 * Licensed under GNU  LESSER General Public License, Version 3.
 * http://www.gnu.org/licenses
 */
package org.beangle.model.predicates;

import java.io.Serializable;

import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.collections.Predicate;

/**
 * ?
 * 
 * @author chaostone
 */
public class ValidEntityPredicate implements Predicate {

    /**
     * @see org.apache.commons.collections.Predicate#evaluate(java.lang.Object)
     */
    public boolean evaluate(final Object value) {
        if (null == value) {
            return false;
        }
        try {
            Serializable key = (Serializable) PropertyUtils.getProperty(value, "id");
            return ValidEntityKeyPredicate.getInstance().evaluate(key);
        } catch (Exception e) {
            return false;
        }
    }

    public static final ValidEntityPredicate INSTANCE = new ValidEntityPredicate();

    public static ValidEntityPredicate getInstance() {
        return INSTANCE;
    }
}