Ensures that a value coming from a LDAP Attribute object does not contain a null value or cause an Exception to be thrown. - Java javax.naming.directory

Java examples for javax.naming.directory:Attributes

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Description

Ensures that a value coming from a LDAP Attribute object does not contain a null value or cause an Exception to be thrown.

Demo Code

/*//from w w w.  j a v  a2  s .c o m
 * Copyright (C) 2009 - 2014 Interactive Media Management
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
import java.util.NoSuchElementException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.naming.NamingException;
import javax.naming.directory.Attribute;
import javax.naming.directory.BasicAttribute;
import javax.naming.directory.DirContext;
import javax.naming.directory.ModificationItem;

public class Main{
    private static final Logger LOG = Logger.getLogger(LdapUtils.class
            .getName());
    private static final String LABEL_ATTRIBUTE_DID_NOT_EXIST = "Attribute did not exist";
    private static final String LABEL_ATTRIBUTE_VALUE_COULD_NOT_BE_OBTAINED = "Attribute value could not be obtained";
    /**
     * Ensures that a value coming from an {@link Attribute} object does not
     * contain a <code>null</code> value or cause an {@link Exception} to be
     * thrown. If an {@link Exception} occur the return value will be blank and
     * the exception will be logged as {@link Level#FINER}.
     *
     * @param att {@link Attribute} to validate
     * @return {@link String} value of the attribute or an empty {@link String}
     * if the attribute contained <code>null</code> or did not exist
     */
    public static String validateAttribute(final Attribute att) {
        String returnValue = "";

        try {
            if (att != null) {
                returnValue = att.get().toString();
            }
        } catch (NoSuchElementException e) {
            LOG.log(Level.FINER, LABEL_ATTRIBUTE_DID_NOT_EXIST);
            LOG.log(Level.FINEST, "", e);
            returnValue = "";
        } catch (NamingException e) {
            LOG.log(Level.FINER,
                    LABEL_ATTRIBUTE_VALUE_COULD_NOT_BE_OBTAINED);
            LOG.log(Level.FINEST, "", e);
            returnValue = "";
        }

        return returnValue;
    }
    /**
     * Ensures that a value coming from an {@link Attribute} object does not
     * contain a <code>null</code> value or cause an {@link Exception} to be
     * thrown. If an {@link Exception} occur the return value will be blank and
     * the exception will be logged as {@link Level#FINER}.
     *
     * @param att {@link Attribute} to validate
     * @param defaultValue Value to return if the {@link Attribute} does not
     * exist
     *
     * @return {@link String} value of the attribute or an empty {@link String}
     * if the attribute contained null or did not exist.
     */
    public static String validateAttribute(final Attribute att,
            final String defaultValue) {
        String returnValue = "";

        try {
            if (att != null) {
                returnValue = att.get().toString();
            }
        } catch (NoSuchElementException e) {
            LOG.log(Level.FINER, LABEL_ATTRIBUTE_DID_NOT_EXIST);
            LOG.log(Level.FINEST, "", e);
            returnValue = defaultValue;
        } catch (NamingException e) {
            LOG.log(Level.FINER,
                    LABEL_ATTRIBUTE_VALUE_COULD_NOT_BE_OBTAINED);
            LOG.log(Level.FINEST, "", e);
            returnValue = defaultValue;
        }

        return returnValue;
    }
}

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