/*

 * Copyright (c) 2003, 2014, Oracle and/or its affiliates. All rights reserved.

 * 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

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package sun.print;

import java.util.Objects;

import java.io.ByteArrayInputStream;

public class AttributeClass {

    private String myName;

    private int myType;

    private int nameLen;

    private Object myValue;

    public static final int TAG_UNSUPPORTED_VALUE = 0x10;

    public static final int TAG_INT = 0x21;

    public static final int TAG_BOOL = 0x22;

    public static final int TAG_ENUM = 0x23;

    public static final int TAG_OCTET = 0x30;

    public static final int TAG_DATE = 0x31;

    public static final int TAG_RESOLUTION = 0x32;

    public static final int TAG_RANGE_INTEGER = 0x33;

    public static final int TAG_TEXT_LANGUAGE = 0x35;

    public static final int TAG_NAME_LANGUAGE = 0x36;

    public static final int TAG_TEXT_WO_LANGUAGE = 0x41;

    public static final int TAG_NAME_WO_LANGUAGE = 0x42;

    public static final int TAG_KEYWORD = 0x44;

    public static final int TAG_URI = 0x45;

    public static final int TAG_CHARSET = 0x47;

    public static final int TAG_NATURALLANGUAGE = 0x48;

    public static final int TAG_MIME_MEDIATYPE = 0x49;

    public static final int TAG_MEMBER_ATTRNAME = 0x4A;

    public static final AttributeClass ATTRIBUTES_CHARSET =

        new AttributeClass("attributes-charset",

                           TAG_CHARSET, "utf-8");

    public static final AttributeClass ATTRIBUTES_NATURAL_LANGUAGE =

        new AttributeClass("attributes-natural-language",

                           TAG_NATURALLANGUAGE, "en");

    /*

     * value passed in by IPPPrintService.readIPPResponse is a sequence

     * of bytes with this format

     * | length1 | byte1 | byte 2 | ... byten | length2 | byte1 ... byten |

     *      :

     * | lengthN | byte1 ... byten | total number of values|

     */

    protected AttributeClass(String name, int type, Object value) {

        myName = name;

        myType = type;

        nameLen = name.length();

        myValue = value;

    }

    public byte getType() {

        return (byte)myType;

    }

    public char[] getLenChars() {

        char[] chars = new char[2];

        chars[0] = 0;

        chars[1] = (char)nameLen;

        return chars;

    }

    /**

     * Returns raw data.

     */

    public Object getObjectValue() {

        return myValue;

    }

    /**

     * Returns single int value.

     */

    public int getIntValue() {

        byte[] bufArray = (byte[])myValue;

        if (bufArray != null) {

            byte[] buf = new byte[4];

            for (int i=0; i<4; i++) {

                buf[i] = bufArray[i+1];

            }

            return convertToInt(buf);

        }

        return 0;

    }

    /**

     * Returns array of int values.

     */

    public int[] getArrayOfIntValues() {

        byte[] bufArray = (byte[])myValue;

        if (bufArray != null) {

            //ArrayList valList = new ArrayList();

            ByteArrayInputStream bufStream =

                new ByteArrayInputStream(bufArray);

            int available = bufStream.available();

            // total number of values is at the end of the stream

            bufStream.mark(available);

            bufStream.skip(available-1);

            int length = bufStream.read();

            bufStream.reset();

            int[] valueArray = new int[length];

            for (int i = 0; i < length; i++) {

                // read length

                int valLength = bufStream.read();

                if (valLength != 4) {

                    // invalid data

                    return null;

                }

                byte[] bufBytes = new byte[valLength];

                bufStream.read(bufBytes, 0, valLength);

                valueArray[i] = convertToInt(bufBytes);

            }

            return valueArray;

        }

        return null;

    }

    /**

     * Returns 2 int values.

     */

    public int[] getIntRangeValue() {

        int[] range = {0, 0};

        byte[] bufArray = (byte[])myValue;

        if (bufArray != null) {

            int nBytes = 4; // 32-bit signed integer

            for (int j=0; j<2; j++) { // 2 set of integers

                byte[] intBytes = new byte[nBytes];

                // REMIND: # bytes should be 8

                for (int i=0; i< nBytes; i++) {

                    //+ 1 because the 1st byte is length

                    intBytes[i] = bufArray[i+(4*j)+1];

                }

                range[j] = convertToInt(intBytes);

            }

        }

        return range;

    }

    /**

     * Returns String value.

     */

    public String getStringValue() {

        //assumes only 1 attribute value.  Will get the first value

        // if > 1.

        String strVal = null;

        byte[] bufArray = (byte[])myValue;

        if (bufArray != null) {

            ByteArrayInputStream bufStream =

                new ByteArrayInputStream(bufArray);

            int valLength = bufStream.read();

            byte[] strBytes = new byte[valLength];

            bufStream.read(strBytes, 0, valLength);

            try {

                strVal = new String(strBytes, "UTF-8");

            } catch (java.io.UnsupportedEncodingException uee) {

            }

        }

        return strVal;

    }

    /**

     * Returns array of String values.

     */

    public String[] getArrayOfStringValues() {

        byte[] bufArray = (byte[])myValue;

        if (bufArray != null) {

            ByteArrayInputStream bufStream =

                new ByteArrayInputStream(bufArray);

            int available = bufStream.available();

            // total number of values is at the end of the stream

            bufStream.mark(available);

            bufStream.skip(available-1);

            int length = bufStream.read();

            bufStream.reset();

            String[] valueArray = new String[length];

            for (int i = 0; i < length; i++) {

                // read length

                int valLength = bufStream.read();

                byte[] bufBytes = new byte[valLength];

                bufStream.read(bufBytes, 0, valLength);

                try {

                    valueArray[i] = new String(bufBytes, "UTF-8");

                } catch (java.io.UnsupportedEncodingException uee) {

                }

            }

            return valueArray;

        }

        return null;

    }

    /**

     * Returns single byte value.

     */

    public byte getByteValue() {

        byte[] bufArray = (byte[])myValue;

        if ((bufArray != null) && (bufArray.length>=2)) {

            return bufArray[1];

        }

        return 0;

    }

    /**

     * Returns attribute name.

     */

    public String getName() {

        return myName;

    }

    @Override

    public boolean equals(Object obj) {

        if (!(obj instanceof AttributeClass)) {

            return false;

        }

        if (this == obj) {

            return true;

        }

        AttributeClass acObj = (AttributeClass) obj;

        return myType == acObj.getType() &&

               Objects.equals(myName, acObj.getName()) &&

               Objects.equals(myValue, acObj.getObjectValue());

    }

    @Override

    public int hashCode() {

        return Objects.hash(myType, myName, myValue);

    }

    public String toString() {

        return myName;

    }

    private int unsignedByteToInt(byte b) {

        return (b & 0xff);

    }

    private int convertToInt(byte[] buf) {

        int intVal = 0;

        int pos = 0;

        intVal+= unsignedByteToInt(buf[pos++]) << 24;

        intVal+= unsignedByteToInt(buf[pos++]) << 16;

        intVal+= unsignedByteToInt(buf[pos++]) << 8;

        intVal+= unsignedByteToInt(buf[pos++]) << 0;

        return intVal;

    }

}