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import javax.imageio.*;
import java.awt.image.*;
import java.awt.event.*;
import java.awt.*;
import java.security.NoSuchAlgorithmException;
import java.security.MessageDigest;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.text.*;
import javax.swing.event.*;
import javax.swing.*;
import java.util.concurrent.atomic.*;
import java.util.concurrent.*;
import java.util.regex.*;
import java.util.List;
import java.util.zip.*;
import java.util.*;
public class main {
static String cmd = "show(\"hello\");";
public static void main(String[] args) throws Exception {
go(); // to reuse variable name "args"
}
static void go() {
List tok = javaTok(cmd);
String functionName = tok.get(1);
List args = new ArrayList();
if (tok.size() > 7) {
assertEquals("(", tok.get(3));
int i = 5;
while (i < tok.size() && !eq(tok.get(i), ")")) {
args.add(unquote(tok.get(i)));
i += 2;
if (tok.get(i).equals(","))
i += 2;
}
}
call(main.class, functionName, args.toArray(new String[args.size()]));
}
static void show(String s) {
print(s);
}
static void assertEquals(Object x, Object y) {
if (!(x == null ? y == null : x.equals(y)))
fail(structure(x) + " != " + structure(y));
}
static boolean eq(Object a, Object b) {
return a == null ? b == null : a.equals(b);
}
// replacement for class JavaTok
// maybe incomplete, might want to add floating point numbers
// todo also: extended multi-line strings
static List javaTok(String s) {
List tok = new ArrayList();
int l = s.length();
int i = 0;
while (i < l) {
int j = i;
char c; String cc;
// scan for whitespace
while (j < l) {
c = s.charAt(j);
cc = s.substring(j, Math.min(j+2, l));
if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
++j;
else if (cc.equals("/*")) {
do ++j; while (j < l && !s.substring(j, Math.min(j+2, l)).equals("*/"));
j = Math.min(j+2, l);
} else if (cc.equals("//")) {
do ++j; while (j < l && "\r\n".indexOf(s.charAt(j)) < 0);
} else
break;
}
tok.add(s.substring(i, j));
i = j;
if (i >= l) break;
c = s.charAt(i); // cc is not needed in rest of loop body
cc = s.substring(i, Math.min(i+2, l));
// scan for non-whitespace
if (c == '\'' || c == '"') {
char opener = c;
++j;
while (j < l) {
if (s.charAt(j) == opener) {
++j;
break;
} else if (s.charAt(j) == '\\' && j+1 < l)
j += 2;
else
++j;
}
} else if (Character.isJavaIdentifierStart(c))
do ++j; while (j < l && Character.isJavaIdentifierPart(s.charAt(j)));
else if (Character.isDigit(c))
do ++j; while (j < l && Character.isDigit(s.charAt(j)));
else if (cc.equals("[[")) {
do ++j; while (j+1 < l && !s.substring(j, j+2).equals("]]"));
j = Math.min(j+2, l);
} else
++j;
tok.add(s.substring(i, j));
i = j;
}
if ((tok.size() % 2) == 0) tok.add("");
return tok;
}
static void print() {
System.out.println();
}
static void print(Object o) {
System.out.println(o);
}
static void print(long i) {
System.out.println(i);
}
public static String unquote(String s) {
if (s.startsWith("[")) {
int i = 1;
while (i < s.length() && s.charAt(i) == '=') ++i;
if (i < s.length() && s.charAt(i) == '[') {
String m = s.substring(1, i);
if (s.endsWith("]" + m + "]"))
return s.substring(i+1, s.length()-i-1);
}
}
if (s.startsWith("\"") && s.endsWith("\"") && s.length() > 1) {
String st = s.substring(1, s.length()-1);
StringBuilder sb = new StringBuilder(st.length());
for (int i = 0; i < st.length(); i++) {
char ch = st.charAt(i);
if (ch == '\\') {
char nextChar = (i == st.length() - 1) ? '\\' : st
.charAt(i + 1);
// Octal escape?
if (nextChar >= '0' && nextChar <= '7') {
String code = "" + nextChar;
i++;
if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
&& st.charAt(i + 1) <= '7') {
code += st.charAt(i + 1);
i++;
if ((i < st.length() - 1) && st.charAt(i + 1) >= '0'
&& st.charAt(i + 1) <= '7') {
code += st.charAt(i + 1);
i++;
}
}
sb.append((char) Integer.parseInt(code, 8));
continue;
}
switch (nextChar) {
case '\\':
ch = '\\';
break;
case 'b':
ch = '\b';
break;
case 'f':
ch = '\f';
break;
case 'n':
ch = '\n';
break;
case 'r':
ch = '\r';
break;
case 't':
ch = '\t';
break;
case '\"':
ch = '\"';
break;
case '\'':
ch = '\'';
break;
// Hex Unicode: u????
case 'u':
if (i >= st.length() - 5) {
ch = 'u';
break;
}
int code = Integer.parseInt(
"" + st.charAt(i + 2) + st.charAt(i + 3)
+ st.charAt(i + 4) + st.charAt(i + 5), 16);
sb.append(Character.toChars(code));
i += 5;
continue;
}
i++;
}
sb.append(ch);
}
return sb.toString();
} else
return s; // return original
}
static Object call(Object o, String method, Object... args) {
try {
if (o instanceof Class) {
Method m = call_findStaticMethod((Class) o, method, args, false);
m.setAccessible(true);
return m.invoke(null, args);
} else {
Method m = call_findMethod(o, method, args, false);
m.setAccessible(true);
return m.invoke(o, args);
}
} catch (Exception e) {
throw new RuntimeException(e);
}
}
static Method call_findStaticMethod(Class c, String method, Object[] args, boolean debug) {
Class _c = c;
while (c != null) {
for (Method m : c.getDeclaredMethods()) {
if (debug)
System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
if (!m.getName().equals(method)) {
if (debug) System.out.println("Method name mismatch: " + method);
continue;
}
if ((m.getModifiers() & Modifier.STATIC) == 0 || !call_checkArgs(m, args, debug))
continue;
return m;
}
c = c.getSuperclass();
}
throw new RuntimeException("Method '" + method + "' (static) with " + args.length + " parameter(s) not found in " + _c.getName());
}
static Method call_findMethod(Object o, String method, Object[] args, boolean debug) {
Class c = o.getClass();
while (c != null) {
for (Method m : c.getDeclaredMethods()) {
if (debug)
System.out.println("Checking method " + m.getName() + " with " + m.getParameterTypes().length + " parameters");;
if (m.getName().equals(method) && call_checkArgs(m, args, debug))
return m;
}
c = c.getSuperclass();
}
throw new RuntimeException("Method '" + method + "' (non-static) with " + args.length + " parameter(s) not found in " + o.getClass().getName());
}
private static boolean call_checkArgs(Method m, Object[] args, boolean debug) {
Class[] types = m.getParameterTypes();
if (types.length != args.length) {
if (debug)
System.out.println("Bad parameter length: " + args.length + " vs " + types.length);
return false;
}
for (int i = 0; i < types.length; i++)
if (!(args[i] == null || isInstanceX(types[i], args[i]))) {
if (debug)
System.out.println("Bad parameter " + i + ": " + args[i] + " vs " + types[i]);
return false;
}
return true;
}
// extended over Class.isInstance() to handle primitive types
private static boolean isInstanceX(Class type, Object arg) {
if (type == boolean.class) return arg instanceof Boolean;
if (type == int.class) return arg instanceof Integer;
if (type == long.class) return arg instanceof Long;
if (type == float.class) return arg instanceof Float;
if (type == short.class) return arg instanceof Short;
if (type == char.class) return arg instanceof Character;
if (type == byte.class) return arg instanceof Byte;
return type.isInstance(arg);
}
static RuntimeException fail() {
throw new RuntimeException("fail");
}
static RuntimeException fail(String msg) {
throw new RuntimeException(msg);
}
static String structure(Object o) {
return structure(o, 0);
}
static String structure(Object o, int stringSizeLimit) {
if (o == null) return "null";
String name = o.getClass().getName();
StringBuilder buf = new StringBuilder();
if (o instanceof Collection) {
for (Object x : (Collection) o) {
if (buf.length() != 0) buf.append(", ");
buf.append(structure(x, stringSizeLimit));
}
return "{" + buf + "}";
}
if (o instanceof Map) {
for (Object e : ((Map) o).entrySet()) {
if (buf.length() != 0) buf.append(", ");
buf.append(structure(((Map.Entry) e).getKey(), stringSizeLimit));
buf.append("=");
buf.append(structure(((Map.Entry) e).getValue(), stringSizeLimit));
}
return "{" + buf + "}";
}
if (o.getClass().isArray()) {
int n = Array.getLength(o);
for (int i = 0; i < n; i++) {
if (buf.length() != 0) buf.append(", ");
buf.append(structure(Array.get(o, i), stringSizeLimit));
}
return "{" + buf + "}";
}
if (o instanceof String)
return quote(stringSizeLimit != 0 ? shorten((String) o, stringSizeLimit) : (String) o);
// Need more cases? This should cover all library classes...
if (name.startsWith("java.") || name.startsWith("javax."))
return String.valueOf(o);
String shortName = o.getClass().getName().replaceAll("^main\\$", "");
// TODO: go to superclasses too
Field[] fields = o.getClass().getDeclaredFields();
int numFields = 0;
String fieldName = "";
for (Field field : fields) {
if ((field.getModifiers() & Modifier.STATIC) != 0)
continue;
Object value;
try {
value = field.get(o);
} catch (Exception e) {
value = "?";
}
fieldName = field.getName();
// put special cases here...
if (value != null) {
if (buf.length() != 0) buf.append(", ");
buf.append(fieldName + "=" + structure(value, stringSizeLimit));
}
++numFields;
}
String b = buf.toString();
if (numFields == 1)
b = b.replaceAll("^" + fieldName + "=", ""); // drop field name if only one
String s = shortName;
if (buf.length() != 0)
s += "(" + b + ")";
return s;
}
public static String quote(String s) {
if (s == null) return "null";
return "\"" + s.replace("\\", "\\\\").replace("\"", "\\\"").replace("\r", "\\r").replace("\n", "\\n") + "\"";
}
static String shorten(String s, int max) {
return s.length() <= max ? s : s.substring(0, Math.min(s.length(), max)) + "...";
}
}