File FileBuffer.java has 519 lines of code (exceeds 250 allowed). Consider refactoring.

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package de.uniks.networkparser.ext.io;

/*
NetworkParser
The MIT License

FileBuffer has 40 methods (exceeds 20 allowed). Consider refactoring.

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public class FileBuffer extends Buffer {
    public static final int BUFFER = 4096;
    private BufferedReader reader;
    private File file;
    private CharacterBuffer lookAHead = new CharacterBuffer();

Method parsingBuffer has a Cognitive Complexity of 26 (exceeds 5 allowed). Consider refactoring.

Open

    private static BaseItem parsingBuffer(CharacterBuffer buffer, BaseItem container) {
        if (buffer != null && buffer.length() > 0) {
            char startCharacter = buffer.nextClean(true);
            if (startCharacter == '{') {
                JsonObject result;

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Method parsingBuffer has 42 lines of code (exceeds 25 allowed). Consider refactoring.

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    private static BaseItem parsingBuffer(CharacterBuffer buffer, BaseItem container) {
        if (buffer != null && buffer.length() > 0) {
            char startCharacter = buffer.nextClean(true);
            if (startCharacter == '{') {
                JsonObject result;

Method writeFile has a Cognitive Complexity of 13 (exceeds 5 allowed). Consider refactoring.

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    public static final int writeFile(String fileName, byte[] data, byte flag) {
        if (fileName == null || fileName.length() < 1) {
            return -1;
        }
        if (data == null || data.length < 1 || (data.length == 1 && data[0] == 0)) {

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Method readBinaryResource has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.

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    public static ByteBuffer readBinaryResource(String file) {
        if (file == null) {
            return null;
        }
        InputStream is = IdMap.class.getResourceAsStream(file);

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Method readFile has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.

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    public static final CharacterBuffer readFile(File file) {
        CharacterBuffer sb = new CharacterBuffer();
        if (file == null) {
            return sb;
        }

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Method readBinaryFile has a Cognitive Complexity of 11 (exceeds 5 allowed). Consider refactoring.

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    public static final ByteBuffer readBinaryFile(String file) {
        if (file == null) {
            return null;
        }
        File content = new File(file);

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Method readResource has a Cognitive Complexity of 10 (exceeds 5 allowed). Consider refactoring.

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    public static CharacterBuffer readResource(InputStream is) {
        CharacterBuffer sb = new CharacterBuffer();
        if (is != null) {
            final byte[] buffer = new byte[BUFFER];
            try {

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Method readBinaryFile has 26 lines of code (exceeds 25 allowed). Consider refactoring.

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    public static final ByteBuffer readBinaryFile(String file) {
        if (file == null) {
            return null;
        }
        File content = new File(file);

Method skip has a Cognitive Complexity of 9 (exceeds 5 allowed). Consider refactoring.

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    public static long skip(InputStream input, long numToSkip) {
        if (input == null) {
            return -1;
        }
        long available = numToSkip;

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Method write has a Cognitive Complexity of 8 (exceeds 5 allowed). Consider refactoring.

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    public int write(byte flag, byte... data) {
        if (this.file == null || data == null) {
            return -1;
        }
        if (data.length == 1 && data[0] == 0) {

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Method getChar has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

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    @Override
    public char getChar() {
        char value = 0;
        if (this.reader == null) {
            return value;

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Avoid too many return statements within this method.

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        return container;

Avoid too many return statements within this method.

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        return false;

Avoid too many return statements within this method.

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        return buffer.write(flag, data);

Avoid too many return statements within this method.

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                return -1;

Method toString has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.

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    @Override
    public String toString() {
        char[] values = new char[remaining()];
        int len = lookAHead.length();
        if (len > 0) {

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Method readFully has a Cognitive Complexity of 6 (exceeds 5 allowed). Consider refactoring.

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    public static int readFully(final InputStream input, final byte[] b, final int offset, final int len) {
        if (b == null || input == null || len < 0 || offset < 0 || len + offset > b.length) {
            return -1;
        }
        int count = 0, x = 0;

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