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Apache CXF example source code file (DataCodingUtils.java)

This example Apache CXF source code file (DataCodingUtils.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Apache CXF tags/keywords

datacodingutils, datacodingutils, eofexception, eofexception, inputstream, io, ioexception, ioexception, outputstream, outputstream

The Apache CXF DataCodingUtils.java source code

/**
 * 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 org.apache.cxf.binding.soap.tcp;

import java.io.*;

/**
 * DataCodingUtils is a utility class for reading and writing integers in SOAP over TCP protocol.
 */
public final class DataCodingUtils {

    private DataCodingUtils() {

    }

    /**
     * Method for reading INTEGER4 values from InputStream
     * 
     * @param inputStream a source stream
     * @param array a buffer for read data
     * @param count a number of integers to be read
     * @throws IOException
     */
    public static void readInts4(final InputStream inputStream, final int[] array,
                                 final int count) throws IOException {
        int value = 0;
        int octet = 0;
        int readInts = 0;
        int shVal = 0;
        int neeble = 0;
        int neebleNum = 0;

        for (; readInts < count; neebleNum++) {
            if (neebleNum % 2 == 0) {
                octet = inputStream.read();
                if (octet == -1) {
                    throw new EOFException();
                }
                neeble = octet >> 4;
            } else {
                neeble = octet & 0xF;
            }

            value |= (neeble & 7) << shVal;
            if ((neeble & 8) == 0) {
                array[readInts++] = value;
                shVal = 0;
                value = 0;
            } else {
                shVal += 3;
            }
        }
    }

    /**
     * Method for reading single INTEGER8 value
     * 
     * @param inputStream a source stream
     * @return read integer
     * @throws IOException
     */
    public static int readInt8(final InputStream inputStream) throws IOException {
        int value = 0;
        int shVal = 0;
        for (int octet = 0x80; (octet & 0x80) != 0; shVal += 7) {
            octet = inputStream.read();
            if (octet == -1) {
                throw new EOFException();
            }

            value |= (octet & 0x7F) << shVal;
        }

        return value;
    }

    /**
     * Method for writing single INTEGER4 value into OutputStream
     * 
     * @param outputStream a target stream
     * @param intValue value that will be written
     * @throws IOException
     */
    public static void writeInt8(final OutputStream outputStream, final int intValue) throws IOException {
        int octet;
        int value = intValue;
        do {
            octet = value & 0x7F;
            value >>>= 7;

            if (value != 0) {
                octet |= 0x80;
            }

            outputStream.write(octet);
        } while(value != 0);
    }

    /**
     * Method for writing variable number of integer values as INTEGER4 values
     * 
     * @param outputStream a target stream
     * @param values a variable length list of integer values that will be written
     * @throws IOException
     */
    public static void writeInts4(final OutputStream outputStream, final int ... values) throws IOException {
        writeInts4(outputStream, values, 0, values.length);
    }

    /**
     * Method for writing integers as INTEGER4 values
     * 
     * @param outputStream a target stream
     * @param array values that will be written
     * @param offset an offset in array from method starts writing
     * @param count a number of integers to be written
     * @throws IOException
     */
    public static void writeInts4(final OutputStream outputStream, final int[] array,
                                  final int offset, final int count) throws IOException {
        int shiftValue = 0;
        for (int i = 0; i < count - 1; i++) {
            final int value = array[offset + i];
            shiftValue = writeInt4(outputStream, value, shiftValue, false);
        }

        if (count > 0) {
            writeInt4(outputStream, array[offset + count - 1], shiftValue, true);
        }
    }

    private static int writeInt4(final OutputStream outputStream, final int intValue,
                                final int highValue, final boolean flush) throws IOException {
        int nibbleL;
        int nibbleH;
        int value = intValue;
        int hValue = highValue;

        if (hValue > 0) {
            hValue &= 0x70; // clear highest bit
            nibbleL = value & 7;
            value >>>= 3;
            if (value != 0) {
                nibbleL |= 8;
            }

            outputStream.write(hValue | nibbleL);

            if (value == 0) {
                return 0;
            }
        }

        do {
            // shift nibbleH to high byte's bits
            nibbleH = (value & 7) << 4;
            value >>>= 3;

            if (value != 0) {
                nibbleH |= 0x80;
                nibbleL = value & 7;
                value >>>= 3;
                if (value != 0) {
                    nibbleL |= 8;
                }
            } else {
                if (!flush) {
                    return nibbleH | 0x80;
                }

                nibbleL = 0;
            }

            outputStream.write(nibbleH | nibbleL);
        } while(value != 0);

        return 0;
    }

}

Other Apache CXF examples (source code examples)

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