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

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Here is the source code for org.beangle.model.predicates.EmptyKeyPredicate.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 org.apache.commons.collections.Predicate;
import org.apache.commons.lang.StringUtils;

public class EmptyKeyPredicate implements Predicate {

    public boolean evaluate(final Object value) {
        boolean success = false;
        if (null != value) {
            if (value instanceof String) {
                success = StringUtils.isEmpty((String) value);
            } else if (value instanceof Number) {
                success = (0 == ((Number) value).intValue());
            } else {
                throw new RuntimeException("unsupported key type");
            }
        }
        return success;
    }

}