HexDumpEncoder [1031892]

import java.nio.ByteBuffer;

/**
 * This is a drop-in replacement for Sun's internal <code>sun.misc.HexDumpEncoder</code> class. It should be completely
 * compatible with the output from Sun's encoder, making it possible to get rid of the now forbidden reference to the
 * internal class without affecting the application's behavior in any way.
 * 
 * @author Erik Wramner
 */
sclass HexDumpEncoder {
    private static final int BYTES_PER_LINE = 16;
    private static final int BYTES_PER_GROUP = 8;
    private static final String LINE_SEPARATOR = System.getProperty("line.separator", "\n");

    public String encodeBuffer(byte[] buf) {
        try {
            Appendable sb = new StringBuilder();
            internalEncode(buf, buf.length, 0, sb, false);
            return sb.toString();
        } catch (IOException e) {
            // This should never happen
            throw new IllegalStateException("IO exception from string builder", e);
        }
    }

    public void encodeBuffer(byte[] buf, OutputStream out) throws IOException {
        internalEncode(buf, buf.length, 0, new OutputStreamAppendableAdapter(out), false);
    }

    public void encodeBuffer(ByteBuffer byteBuffer, OutputStream out) throws IOException {
        OutputStreamAppendableAdapter appendable = new OutputStreamAppendableAdapter(out);
        internalEncode(byteBuffer, appendable, false);
    }

    public String encodeBuffer(ByteBuffer byteBuffer) {
        StringBuilder sb = new StringBuilder();
        try {
            internalEncode(byteBuffer, sb, false);
        } catch (IOException e) {
            // This should never happen
            throw new IllegalStateException("IO exception from string builder", e);
        }
        return sb.toString();
    }

    public void encodeBuffer(InputStream in, OutputStream out) throws IOException {
        Appendable outAppendable = new OutputStreamAppendableAdapter(out);
        int address = 0;
        byte[] buf = new byte[BYTES_PER_LINE * 100];
        int bytesRead = fillBuffer(in, buf);
        while (bytesRead > 0) {
            internalEncode(buf, bytesRead, address, outAppendable, false);
            if (bytesRead == buf.length) {
                address += bytesRead;
                bytesRead = fillBuffer(in, buf);
            } else {
                bytesRead = 0;
            }
        }
    }

    public String encode(byte[] buf) {
        try {
            Appendable sb = new StringBuilder();
            internalEncode(buf, buf.length, 0, sb, true);
            return sb.toString();
        } catch (IOException e) {
            // This should never happen
            throw new IllegalStateException("IO exception from string builder", e);
        }
    }

    public void encode(byte[] buf, OutputStream out) throws IOException {
        internalEncode(buf, buf.length, 0, new OutputStreamAppendableAdapter(out), true);
    }

    public void encode(ByteBuffer byteBuffer, OutputStream out) throws IOException {
        OutputStreamAppendableAdapter appendable = new OutputStreamAppendableAdapter(out);
        internalEncode(byteBuffer, appendable, true);
    }

    public String encode(ByteBuffer byteBuffer) {
        StringBuilder sb = new StringBuilder();
        try {
            internalEncode(byteBuffer, sb, true);
        } catch (IOException e) {
            // This should never happen
            throw new IllegalStateException("IO exception from string builder", e);
        }
        return sb.toString();
    }

    public void encode(InputStream in, OutputStream out) throws IOException {
        Appendable outAppendable = new OutputStreamAppendableAdapter(out);
        int address = 0;
        byte[] buf = new byte[BYTES_PER_LINE * 100];
        int bytesRead = fillBuffer(in, buf);
        while (bytesRead > 0) {
            internalEncode(buf, bytesRead, address, outAppendable, true);
            if (bytesRead == buf.length) {
                address += bytesRead;
                bytesRead = fillBuffer(in, buf);
            } else {
                bytesRead = 0;
            }
        }
    }

    private int fillBuffer(InputStream in, byte[] buf) throws IOException {
        int totalBytesRead = 0;
        int bytesLeft = buf.length;
        while (bytesLeft > 0) {
            int bytesRead = in.read(buf, totalBytesRead, bytesLeft);
            if (bytesRead == -1) {
                break;
            } else {
                bytesLeft -= bytesRead;
                totalBytesRead += bytesRead;
            }
        }
        return totalBytesRead;
    }

    private void internalEncode(ByteBuffer byteBuffer, Appendable appendable, boolean dropAsciiForPartialLine)
            throws IOException {
        int address = 0;
        while (byteBuffer.hasRemaining()) {
            byte[] buf = new byte[Math.min(byteBuffer.remaining(), BYTES_PER_LINE * 100)];
            byteBuffer.get(buf);
            internalEncode(buf, buf.length, address, appendable, dropAsciiForPartialLine);
            address += buf.length;
        }
    }

    private void internalEncode(byte[] buf, int length, int baseAddress, Appendable sb, boolean dropAsciiForPartialLine)
            throws IOException {
        StringBuilder asciiStringBuilder = new StringBuilder();
        for (int i = 0; i < length; i++) {
            if (i % BYTES_PER_LINE == 0) {
                if (asciiStringBuilder.length() > 0) {
                    sb.append("  ");
                    sb.append(asciiStringBuilder);
                    sb.append(LINE_SEPARATOR);
                    asciiStringBuilder.setLength(0);
                }
                appendHexDigit(sb, (byte) (((baseAddress + i) >>> 8) & 0xFF));
                appendHexDigit(sb, (byte) ((baseAddress + i) & 0xFF));
                sb.append(':');
            } else if (i % BYTES_PER_GROUP == 0) {
                sb.append("  ");
            }
            sb.append(' ');
            final byte b = buf[i];
            appendHexDigit(sb, b);
            if (b >= 0x20 && b <= 0x7a) {
                asciiStringBuilder.append((char) b);
            } else {
                asciiStringBuilder.append('.');
            }
        }

        if (dropAsciiForPartialLine) {
            // Be bug compatible
            if (asciiStringBuilder.length() > 0) {
                sb.append(' ');
                if (length % BYTES_PER_LINE == BYTES_PER_GROUP) {
                    sb.append("  ");
                } else if (length % BYTES_PER_LINE == 0) {
                    sb.append(' ');
                    sb.append(asciiStringBuilder);
                    sb.append(LINE_SEPARATOR);
                }
            }
        } else if (asciiStringBuilder.length() > 0) {
            int remainingBytes = BYTES_PER_LINE - length % BYTES_PER_LINE;
            if (remainingBytes != BYTES_PER_LINE) {
                for (int i = 0; i < remainingBytes; i++) {
                    sb.append("   ");
                }
                if (remainingBytes >= BYTES_PER_GROUP) {
                    sb.append("  ");
                }
            }
            sb.append("  ");
            sb.append(asciiStringBuilder);
            sb.append(LINE_SEPARATOR);
        }
    }

    private void appendHexDigit(Appendable sb, byte b) throws IOException {
        int nibble = (char) (b >> 4 & 0xF);
        sb.append((char) (nibble > 9 ? nibble - 10 + 65 : nibble + 48));
        nibble = (char) (b & 0xF);
        sb.append((char) (nibble > 9 ? nibble - 10 + 65 : nibble + 48));
    }

    private static class OutputStreamAppendableAdapter implements Appendable {
        private final OutputStream _out;

        public OutputStreamAppendableAdapter(OutputStream out) {
            _out = out;
        }

        @Override
        public Appendable append(CharSequence cs) throws IOException {
            append(cs, 0, cs.length());
            return this;
        }

        @Override
        public Appendable append(CharSequence cs, int start, int end) throws IOException {
            for (int i = start; i < end; i++) {
                append(cs.charAt(i));
            }
            return this;
        }

        @Override
        public Appendable append(char c) throws IOException {
            _out.write(c);
            return this;
        }
    }
}

Snippet ID:	#1031892
Snippet name:	HexDumpEncoder
Eternal ID of this version:	#1031892/3
Text MD5:	7a9606d36fd6c28e3fa0e834d4090ec0
Transpilation MD5:	0b0cce7809c36fe2e9d436ce0ee2885a
Author:	stefan
Category:	javax
Type:	JavaX fragment (include)
Public (visible to everyone):	Yes
Archived (hidden from active list):	No
Created/modified:	2021-07-24 05:36:52
Source code size:	8536 bytes / 224 lines
Pitched / IR pitched:	No / No
Views / Downloads:	92 / 217
Version history:	2 change(s)
Referenced in:	[show references]

< > BotCompany Repo | #1031892 // HexDumpEncoder

JavaX fragment (include) [tags: use-pretranspiled]

1	import java.nio.ByteBuffer;
2
3	/**
4	* This is a drop-in replacement for Sun's internal <code>sun.misc.HexDumpEncoder</code> class. It should be completely
5	* compatible with the output from Sun's encoder, making it possible to get rid of the now forbidden reference to the
6	* internal class without affecting the application's behavior in any way.
7	*
8	* @author Erik Wramner
9	*/
10	sclass HexDumpEncoder {
11	private static final int BYTES_PER_LINE = 16;
12	private static final int BYTES_PER_GROUP = 8;
13	private static final String LINE_SEPARATOR = System.getProperty("line.separator", "\n");
14
15	public String encodeBuffer(byte[] buf) {
16	try {
17	Appendable sb = new StringBuilder();
18	internalEncode(buf, buf.length, 0, sb, false);
19	return sb.toString();
20	} catch (IOException e) {
21	// This should never happen
22	throw new IllegalStateException("IO exception from string builder", e);
23	}
24	}
25
26	public void encodeBuffer(byte[] buf, OutputStream out) throws IOException {
27	internalEncode(buf, buf.length, 0, new OutputStreamAppendableAdapter(out), false);
28	}
29
30	public void encodeBuffer(ByteBuffer byteBuffer, OutputStream out) throws IOException {
31	OutputStreamAppendableAdapter appendable = new OutputStreamAppendableAdapter(out);
32	internalEncode(byteBuffer, appendable, false);
33	}
34
35	public String encodeBuffer(ByteBuffer byteBuffer) {
36	StringBuilder sb = new StringBuilder();
37	try {
38	internalEncode(byteBuffer, sb, false);
39	} catch (IOException e) {
40	// This should never happen
41	throw new IllegalStateException("IO exception from string builder", e);
42	}
43	return sb.toString();
44	}
45
46	public void encodeBuffer(InputStream in, OutputStream out) throws IOException {
47	Appendable outAppendable = new OutputStreamAppendableAdapter(out);
48	int address = 0;
49	byte[] buf = new byte[BYTES_PER_LINE * 100];
50	int bytesRead = fillBuffer(in, buf);
51	while (bytesRead > 0) {
52	internalEncode(buf, bytesRead, address, outAppendable, false);
53	if (bytesRead == buf.length) {
54	address += bytesRead;
55	bytesRead = fillBuffer(in, buf);
56	} else {
57	bytesRead = 0;
58	}
59	}
60	}
61
62	public String encode(byte[] buf) {
63	try {
64	Appendable sb = new StringBuilder();
65	internalEncode(buf, buf.length, 0, sb, true);
66	return sb.toString();
67	} catch (IOException e) {
68	// This should never happen
69	throw new IllegalStateException("IO exception from string builder", e);
70	}
71	}
72
73	public void encode(byte[] buf, OutputStream out) throws IOException {
74	internalEncode(buf, buf.length, 0, new OutputStreamAppendableAdapter(out), true);
75	}
76
77	public void encode(ByteBuffer byteBuffer, OutputStream out) throws IOException {
78	OutputStreamAppendableAdapter appendable = new OutputStreamAppendableAdapter(out);
79	internalEncode(byteBuffer, appendable, true);
80	}
81
82	public String encode(ByteBuffer byteBuffer) {
83	StringBuilder sb = new StringBuilder();
84	try {
85	internalEncode(byteBuffer, sb, true);
86	} catch (IOException e) {
87	// This should never happen
88	throw new IllegalStateException("IO exception from string builder", e);
89	}
90	return sb.toString();
91	}
92
93	public void encode(InputStream in, OutputStream out) throws IOException {
94	Appendable outAppendable = new OutputStreamAppendableAdapter(out);
95	int address = 0;
96	byte[] buf = new byte[BYTES_PER_LINE * 100];
97	int bytesRead = fillBuffer(in, buf);
98	while (bytesRead > 0) {
99	internalEncode(buf, bytesRead, address, outAppendable, true);
100	if (bytesRead == buf.length) {
101	address += bytesRead;
102	bytesRead = fillBuffer(in, buf);
103	} else {
104	bytesRead = 0;
105	}
106	}
107	}
108
109	private int fillBuffer(InputStream in, byte[] buf) throws IOException {
110	int totalBytesRead = 0;
111	int bytesLeft = buf.length;
112	while (bytesLeft > 0) {
113	int bytesRead = in.read(buf, totalBytesRead, bytesLeft);
114	if (bytesRead == -1) {
115	break;
116	} else {
117	bytesLeft -= bytesRead;
118	totalBytesRead += bytesRead;
119	}
120	}
121	return totalBytesRead;
122	}
123
124	private void internalEncode(ByteBuffer byteBuffer, Appendable appendable, boolean dropAsciiForPartialLine)
125	throws IOException {
126	int address = 0;
127	while (byteBuffer.hasRemaining()) {
128	byte[] buf = new byte[Math.min(byteBuffer.remaining(), BYTES_PER_LINE * 100)];
129	byteBuffer.get(buf);
130	internalEncode(buf, buf.length, address, appendable, dropAsciiForPartialLine);
131	address += buf.length;
132	}
133	}
134
135	private void internalEncode(byte[] buf, int length, int baseAddress, Appendable sb, boolean dropAsciiForPartialLine)
136	throws IOException {
137	StringBuilder asciiStringBuilder = new StringBuilder();
138	for (int i = 0; i < length; i++) {
139	if (i % BYTES_PER_LINE == 0) {
140	if (asciiStringBuilder.length() > 0) {
141	sb.append(" ");
142	sb.append(asciiStringBuilder);
143	sb.append(LINE_SEPARATOR);
144	asciiStringBuilder.setLength(0);
145	}
146	appendHexDigit(sb, (byte) (((baseAddress + i) >>> 8) & 0xFF));
147	appendHexDigit(sb, (byte) ((baseAddress + i) & 0xFF));
148	sb.append(':');
149	} else if (i % BYTES_PER_GROUP == 0) {
150	sb.append(" ");
151	}
152	sb.append(' ');
153	final byte b = buf[i];
154	appendHexDigit(sb, b);
155	if (b >= 0x20 && b <= 0x7a) {
156	asciiStringBuilder.append((char) b);
157	} else {
158	asciiStringBuilder.append('.');
159	}
160	}
161
162	if (dropAsciiForPartialLine) {
163	// Be bug compatible
164	if (asciiStringBuilder.length() > 0) {
165	sb.append(' ');
166	if (length % BYTES_PER_LINE == BYTES_PER_GROUP) {
167	sb.append(" ");
168	} else if (length % BYTES_PER_LINE == 0) {
169	sb.append(' ');
170	sb.append(asciiStringBuilder);
171	sb.append(LINE_SEPARATOR);
172	}
173	}
174	} else if (asciiStringBuilder.length() > 0) {
175	int remainingBytes = BYTES_PER_LINE - length % BYTES_PER_LINE;
176	if (remainingBytes != BYTES_PER_LINE) {
177	for (int i = 0; i < remainingBytes; i++) {
178	sb.append(" ");
179	}
180	if (remainingBytes >= BYTES_PER_GROUP) {
181	sb.append(" ");
182	}
183	}
184	sb.append(" ");
185	sb.append(asciiStringBuilder);
186	sb.append(LINE_SEPARATOR);
187	}
188	}
189
190	private void appendHexDigit(Appendable sb, byte b) throws IOException {
191	int nibble = (char) (b >> 4 & 0xF);
192	sb.append((char) (nibble > 9 ? nibble - 10 + 65 : nibble + 48));
193	nibble = (char) (b & 0xF);
194	sb.append((char) (nibble > 9 ? nibble - 10 + 65 : nibble + 48));
195	}
196
197	private static class OutputStreamAppendableAdapter implements Appendable {
198	private final OutputStream _out;
199
200	public OutputStreamAppendableAdapter(OutputStream out) {
201	_out = out;
202	}
203
204	@Override
205	public Appendable append(CharSequence cs) throws IOException {
206	append(cs, 0, cs.length());
207	return this;
208	}
209
210	@Override
211	public Appendable append(CharSequence cs, int start, int end) throws IOException {
212	for (int i = start; i < end; i++) {
213	append(cs.charAt(i));
214	}
215	return this;
216	}
217
218	@Override
219	public Appendable append(char c) throws IOException {
220	_out.write(c);
221	return this;
222	}
223	}
224	}