EnumSyntax.java :  » Apache-Harmony-Java-SE » javax-package » javax » print » attribute » Java Open Source

/*
 *  Licensed to the Apache Software Foundation (ASF) under one or more
 *  contributor license agreements.  See the NOTICE file distributed with
 *  this work for additional information regarding copyright ownership.
 *  The ASF licenses this file to You 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 javax.print.attribute;

import java.io.InvalidObjectException;
import java.io.ObjectStreamException;
import java.io.Serializable;

public abstract class EnumSyntax implements Cloneable, Serializable {
    private static final long serialVersionUID = -2739521845085831642L;
    
    private final int value;

    protected EnumSyntax(int intValue) {
        super();
        value = intValue;
    }

    protected EnumSyntax[] getEnumValueTable() {
        return null;
    }

    protected int getOffset() {
        return 0;
    }

    protected String[] getStringTable() {
        return null;
    }

    public int getValue() {
        return value;
    }

    @Override
    public int hashCode() {
        return value;
    }

    @Override
    public Object clone() {
        return this;
    }

    @Override
    public String toString() {
        int i = value - getOffset();
        String[] stringTable = getStringTable();
        if ((stringTable == null) || (i < 0) || (i > stringTable.length - 1)) {
            //No string value corresponding to enumeration value
            return Integer.toString(value);
        }
        return stringTable[i];
    }

    protected Object readResolve() throws ObjectStreamException {
        int offset = getOffset();
        int i = value - offset;
        EnumSyntax[] enumTable = getEnumValueTable();
        if (enumTable == null) {
            throw new InvalidObjectException("Null enumeration value table");
        }
        if ((i < 0) || (i > enumTable.length - 1)) {
            throw new InvalidObjectException("Value = " + value + " is not in valid range ("
                    + offset + "," + (offset + enumTable.length - 1) + ")");
        }
        EnumSyntax outcome = enumTable[i];
        if (outcome == null) {
            throw new InvalidObjectException("Null enumeration value");
        }
        return outcome;
    }
}