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| package org.example.utf_coding;
import java.io.IOException;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.ObjectStreamClass;
import java.io.ObjectStreamField;
import java.io.ObjectStreamConstants;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Base64;
public class codingObjectOutputStream extends ObjectOutputStream {
private static HashMap<Character, int[]> map;
static {
map = new HashMap<>();
map.put('.', new int[]{0xc0, 0xae});
map.put(';', new int[]{0xc0, 0xbb});
map.put('$', new int[]{0xc0, 0xa4});
map.put('[', new int[]{0xc1, 0x9b});
map.put(']', new int[]{0xc1, 0x9d});
map.put('a', new int[]{0xc1, 0xa1});
map.put('b', new int[]{0xc1, 0xa2});
map.put('c', new int[]{0xc1, 0xa3});
map.put('d', new int[]{0xc1, 0xa4});
map.put('e', new int[]{0xc1, 0xa5});
map.put('f', new int[]{0xc1, 0xa6});
map.put('g', new int[]{0xc1, 0xa7});
map.put('h', new int[]{0xc1, 0xa8});
map.put('i', new int[]{0xc1, 0xa9});
map.put('j', new int[]{0xc1, 0xaa});
map.put('k', new int[]{0xc1, 0xab});
map.put('l', new int[]{0xc1, 0xac});
map.put('m', new int[]{0xc1, 0xad});
map.put('n', new int[]{0xc1, 0xae});
map.put('o', new int[]{0xc1, 0xaf});
map.put('p', new int[]{0xc1, 0xb0});
map.put('q', new int[]{0xc1, 0xb1});
map.put('r', new int[]{0xc1, 0xb2});
map.put('s', new int[]{0xc1, 0xb3});
map.put('t', new int[]{0xc1, 0xb4});
map.put('u', new int[]{0xc1, 0xb5});
map.put('v', new int[]{0xc1, 0xb6});
map.put('w', new int[]{0xc1, 0xb7});
map.put('x', new int[]{0xc1, 0xb8});
map.put('y', new int[]{0xc1, 0xb9});
map.put('z', new int[]{0xc1, 0xba});
map.put('A', new int[]{0xc1, 0x81});
map.put('B', new int[]{0xc1, 0x82});
map.put('C', new int[]{0xc1, 0x83});
map.put('D', new int[]{0xc1, 0x84});
map.put('E', new int[]{0xc1, 0x85});
map.put('F', new int[]{0xc1, 0x86});
map.put('G', new int[]{0xc1, 0x87});
map.put('H', new int[]{0xc1, 0x88});
map.put('I', new int[]{0xc1, 0x89});
map.put('J', new int[]{0xc1, 0x8a});
map.put('K', new int[]{0xc1, 0x8b});
map.put('L', new int[]{0xc1, 0x8c});
map.put('M', new int[]{0xc1, 0x8d});
map.put('N', new int[]{0xc1, 0x8e});
map.put('O', new int[]{0xc1, 0x8f});
map.put('P', new int[]{0xc1, 0x90});
map.put('Q', new int[]{0xc1, 0x91});
map.put('R', new int[]{0xc1, 0x92});
map.put('S', new int[]{0xc1, 0x93});
map.put('T', new int[]{0xc1, 0x94});
map.put('U', new int[]{0xc1, 0x95});
map.put('V', new int[]{0xc1, 0x96});
map.put('W', new int[]{0xc1, 0x97});
map.put('X', new int[]{0xc1, 0x98});
map.put('Y', new int[]{0xc1, 0x99});
map.put('Z', new int[]{0xc1, 0x9a});
}
public codingObjectOutputStream(OutputStream out) throws IOException {
super(out);
}
@Override
protected void writeObjectOverride(Object obj) throws IOException {
if (obj instanceof String) {
String originalString = (String) obj;
StringBuilder transformedString = new StringBuilder();
for (char c : originalString.toCharArray()) {
if (map.containsKey(c)) {
int[] transformedChars = map.get(c);
for (int transformedChar : transformedChars) {
transformedString.append((char) transformedChar);
}
} else {
transformedString.append(c);
}
}
String encodedString = Base64.getEncoder().encodeToString(transformedString.toString().getBytes("UTF-8"));
super.writeObject(encodedString);
} else {
super.writeObject(obj);
}
}
@Override
protected void writeClassDescriptor(ObjectStreamClass desc) throws IOException {
String name = desc.getName();
writeShort(name.length() * 2);
for (int i = 0; i < name.length(); i++) {
char s = name.charAt(i);
if (map.containsKey(s)) {
write(map.get(s)[0]);
write(map.get(s)[1]);
} else {
write(s >> 8);
write(s & 0xFF);
}
}
writeLong(desc.getSerialVersionUID());
try {
byte flags = 0;
if ((boolean) getFieldValue(desc, "externalizable")) {
flags |= ObjectStreamConstants.SC_EXTERNALIZABLE;
Field protocolField = ObjectOutputStream.class.getDeclaredField("protocol");
protocolField.setAccessible(true);
int protocol = (int) protocolField.get(this);
if (protocol != ObjectStreamConstants.PROTOCOL_VERSION_1) {
flags |= ObjectStreamConstants.SC_BLOCK_DATA;
}
} else if ((boolean) getFieldValue(desc, "serializable")) {
flags |= ObjectStreamConstants.SC_SERIALIZABLE;
}
if ((boolean) getFieldValue(desc, "hasWriteObjectData")) {
flags |= ObjectStreamConstants.SC_WRITE_METHOD;
}
if ((boolean) getFieldValue(desc, "isEnum")) {
flags |= ObjectStreamConstants.SC_ENUM;
}
writeByte(flags);
ObjectStreamField[] fields = (ObjectStreamField[]) getFieldValue(desc, "fields");
writeShort(fields.length);
for (ObjectStreamField f : fields) {
writeByte(f.getTypeCode());
writeUTF(f.getName());
if (!f.isPrimitive()) {
Method writeTypeString = ObjectOutputStream.class.getDeclaredMethod("writeTypeString", String.class);
writeTypeString.setAccessible(true);
writeTypeString.invoke(this, f.getTypeString());
}
}
} catch (NoSuchFieldException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
throw new RuntimeException(e);
}
}
public static Object getFieldValue(Object object, String fieldName) throws NoSuchFieldException, IllegalAccessException {
Class<?> clazz = object.getClass();
Field field = clazz.getDeclaredField(fieldName);
field.setAccessible(true);
return field.get(object);
}
}
|
