/*
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package org.jsmpp.bean;

/**
 * This is enum of the alphabet type.
 * 
 * @author uudashr
 * @version 1.0
 * 
 */
public enum Alphabet {

    /**
     * SMSC alphabet default
     */
    ALPHA_DEFAULT((byte)0x00),

    /**
     * 8-bit binary octet unspecified coding.
     */
    ALPHA_8_BIT((byte)0x04),

    /**
     * UCS2 alphabet coding (16-bit)
     */
    ALPHA_UCS2((byte)0x08),

    /**
     * Unused.
     */
    ALPHA_RESERVED((byte)0x0c);

    /**
     * Is the MASK of alphabet (00001100).
     */
    public static final byte MASK_ALPHABET = 0x0c; // bin: 00001100

    private final byte value;

    /**
     * Default constructor.
     * 
     * @param value is the alphabet value.
     */
    private Alphabet(byte value) {
        this.value = value;
    }

    /**
     * Get the alphabet value.
     * 
     * @return the alphabet value.
     */
    public byte value() {
        return value;
    }

    /**
     * Get the enum constant associated with specified value.
     * 
     * @param value is the value associated with the <tt>Alphabet</tt> enum
     *        constant.
     * @return the associated enum constant.
     * @throws IllegalArgumentException if there is no associated enum constant
     *         for given value.
     */
    public static Alphabet valueOf(byte value) throws IllegalArgumentException {
        for (Alphabet val : values()) {
            if (val.value == value)
                return val;
        }
        throw new IllegalArgumentException("No enum const Alphabet with value "
                + value);
    }
    
    public static Alphabet parseDataCoding(byte dataCoding) throws IllegalArgumentException {
        byte value = (byte)(dataCoding & MASK_ALPHABET);
        for (Alphabet val : values()) {
            if (val.value == value)
                return val;
        }
        throw new IllegalArgumentException("No enum const Alphabet with value "
                + value + " for dataCoding " + dataCoding);
    }

}

/*
 * Licensed under the Apache License, Version 2.0 (the "License"); 
 * you may not use this file except in compliance with the License. 
 * You may obtain a copy of the License at
 * 
 *    http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */
package org.jsmpp.bean;

/**
 * This is enum of the alphabet type.
 *
 * Alphabet represents the lower 4 bits of the data_coding field in the PDU,
 * as specified in s5.2.19 of the SMPP v3.4 specification.
 * 
 * @author uudashr
 * @version 1.0
 * 
 */
public enum Alphabet {

    /**
     * SMSC alphabet default
     */
    ALPHA_DEFAULT((byte)0x00),

    /**
     * 8-bit binary octet unspecified coding.
     */
    ALPHA_8_BIT((byte)0x04),

    /**
     * UCS2 alphabet coding (16-bit)
     */
    ALPHA_UCS2((byte)0x08),

    /**
     * Unused.
     */
    ALPHA_RESERVED((byte)0x0c);

    /**
     * Is the MASK of alphabet (00001100).
     */
    public static final byte MASK_ALPHABET = 0x0c; // bin: 00001100

    private final byte value;

    /**
     * Default constructor.
     * 
     * @param value is the alphabet value.
     */
    private Alphabet(byte value) {
        this.value = value;
    }

    /**
     * Get the alphabet value.
     * 
     * @return the alphabet value.
     */
    public byte value() {
        return value;
    }

    /**
     * Get the enum constant associated with specified value.
     * 
     * @param value is the value associated with the <tt>Alphabet</tt> enum
     *        constant.
     * @return the associated enum constant.
     * @throws IllegalArgumentException if there is no associated enum constant
     *         for given value.
     */
    public static Alphabet valueOf(byte value) throws IllegalArgumentException {
        for (Alphabet val : values()) {
            if (val.value == value)
                return val;
        }
        throw new IllegalArgumentException("No enum const Alphabet with value "
                + value);
    }
    
    public static Alphabet parseDataCoding(byte dataCoding) throws IllegalArgumentException {
        byte value = (byte)(dataCoding & MASK_ALPHABET);
        for (Alphabet val : values()) {
            if (val.value == value)
                return val;
        }
        throw new IllegalArgumentException("No enum const Alphabet with value "
                + value + " for dataCoding " + dataCoding);
    }

}

Clarify the meaning of Alphabet in relation to the SMPP spec