/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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package com.sun.xml.internal.bind.v2.runtime.unmarshaller;

import java.io.IOException;

import com.sun.xml.internal.bind.v2.runtime.output.Pcdata;

import com.sun.xml.internal.bind.v2.runtime.output.UTF8XmlOutput;

/**

 * {@link Pcdata} that represents a single integer.

 *

 * @author Kohsuke Kawaguchi

 */

public class IntData extends Pcdata {

    /**

     * The int value that this {@link Pcdata} represents.

     *

     * Modifiable.

     */

    private int data;

    /**

     * Length of the {@link #data} in ASCII string.

     * For example if data=-10, then length=3

     */

    private int length;

    public void reset(int i) {

        this.data = i;

        if(i==Integer.MIN_VALUE)

            length = 11;

        else

            length = (i < 0) ? stringSizeOfInt(-i) + 1 : stringSizeOfInt(i);

    }

    private final static int [] sizeTable = { 9, 99, 999, 9999, 99999, 999999, 9999999,

                                     99999999, 999999999, Integer.MAX_VALUE };

    // Requires positive x

    private static int stringSizeOfInt(int x) {

        for (int i=0; ; i++)

            if (x <= sizeTable[i])

                return i+1;

    }

    public String toString() {

        return String.valueOf(data);

    }

    public int length() {

        return length;

    }

    public char charAt(int index) {

        return toString().charAt(index);

    }

    public CharSequence subSequence(int start, int end) {

        return toString().substring(start,end);

    }

    public void writeTo(UTF8XmlOutput output) throws IOException {

        output.text(data);

    }

}