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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.management.*;
import java.lang.ref.*;
import java.lang.reflect.*;
import java.net.*;
import java.io.*;
import javax.swing.table.*;
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 List rules = new ArrayList();
static List statements = new ArrayList();
public static void main(String[] args) throws Exception {
rules.add("\"$1 is the singular of $2.\" <=> \"$2 is the plural of $1.\"");
statements.add("house is the singular of houses.");
process();
print(fromLines(statements));
}
static void process() {
for (String rule : rules) {
Matches m = new Matches();
if (match3("* <=> *", rule, m)) {
String l = m.unq(0), r = m.unq(1);
for (Map map : matchStatements(l))
addStatement(convert(r, map));
}
}
}
static List> matchStatements(String pat) {
List> l = new ArrayList>();
for (String s : statements) {
Map m = match4(pat, s);
if (m != null) l.add(m);
}
return l;
}
static Map match4(String pat, String s) {
List tok1 = parse3(pat), tok2 = parse3(s);
if (tok1.size() != tok2.size()) return null;
Map m = new TreeMap();
for (int i = 1; i < tok1.size(); i += 2) {
String t1 = tok1.get(i), t2 = tok2.get(i);
if (isVar(t1))
m.put(t1, t2);
else if (!t1.equalsIgnoreCase(t2))
return null;
}
return m;
}
static boolean isVar(String s) {
return s.startsWith("$") && s.length() > 1;
}
static String convert(String r, Map matches) {
List tok = javaTokPlusPeriod(r);
for (int i = 1; i < tok.size(); i += 2) {
if (tok.get(i).startsWith("$")) {
String m = matches.get(tok.get(i));
if (m != null)
tok.set(i, m);
}
}
return join(tok);
}
static void addStatement(String s) {
for (String st : statements)
if (match3(st, s))
return;
statements.add(s);
}
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
} // unquote
static boolean parseBoolean(String s) {
return eq(s, "true");
} // parseBoolean
static String formatSnippetID(String id) {
return "#" + parseSnippetID(id);
}
static String formatSnippetID(long id) {
return "#" + id;
} // formatSnippetID
static List parse3(String s) {
return dropPunctuation(javaTokPlusPeriod(s));
}
static class Matches {
String[] m;
String unq(int i) { return unquote(m[i]); }
String fsi(int i) { return formatSnippetID(unq(i)); }
boolean bool(int i) { return parseBoolean(unq(i)); }
}
// class Matches
static boolean match3(String pat, String s) {
return match3(pat, s, null);
}
static boolean match3(String pat, String s, Matches matches) {
if (s == null) return false;
List tokpat = parse3(pat), toks = parse3(s);
String[] m = match2(tokpat, toks);
//print(structure(tokpat) + " on " + structure(toks) + " => " + structure(m));
if (m == null)
return false;
else {
if (matches != null) matches.m = m;
return true;
}
}
static boolean eq(Object a, Object b) {
return a == null ? b == null : a.equals(b);
}
// This is made for NL parsing.
// It's javaTok extended with "..." token and "$n"
static List javaTokPlusPeriod(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 = 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)) || s.charAt(j) == '\'')); // for things like "this one's"
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 if (s.substring(j, Math.min(j+3, l)).equals("..."))
j += 3;
else if (c == '$')
do ++j; while (j < l && Character.isDigit(s.charAt(j)));
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 fromLines(List lines) {
StringBuilder buf = new StringBuilder();
for (String line : lines) {
buf.append(line).append('\n');
}
return buf.toString();
}
public static String join(String glue, Iterable strings) {
StringBuilder buf = new StringBuilder();
Iterator i = strings.iterator();
if (i.hasNext()) {
buf.append(i.next());
while (i.hasNext())
buf.append(glue).append(i.next());
}
return buf.toString();
}
public static String join(String glue, String[] strings) {
return join(glue, Arrays.asList(strings));
}
public static String join(Iterable strings) {
return join("", strings);
}
public static String join(String[] strings) {
return join("", strings);
}
public static long parseSnippetID(String snippetID) {
return Long.parseLong(shortenSnippetID(snippetID));
}
static List dropPunctuation(List tok) {
tok = new ArrayList(tok);
for (int i = 1; i < tok.size(); i += 2) {
String t = tok.get(i);
if (t.length() == 1 && !Character.isLetter(t.charAt(0)) && !Character.isDigit(t.charAt(0)) && !t.equals("*")) {
tok.set(i-1, tok.get(i-1) + tok.get(i+1));
tok.remove(i);
tok.remove(i);
i -= 2;
}
}
return tok;
}
// match2 matches multiple "*" (matches a single token) wildcards and zero or one "..." wildcards (matches multiple tokens)
static String[] match2(List pat, List tok) {
// standard case (no ...)
int i = pat.indexOf("...");
if (i < 0) return match2_match(pat, tok);
pat = new ArrayList(pat); // We're modifying it, so copy first
pat.set(i, "*");
while (pat.size() < tok.size()) {
pat.add(i, "*");
pat.add(i+1, ""); // doesn't matter
}
return match2_match(pat, tok);
}
static String[] match2_match(List pat, List tok) {
List result = new ArrayList();
if (pat.size() != tok.size()) {
/*if (debug)
print("Size mismatch: " + structure(pat) + " vs " + structure(tok));*/
return null;
}
for (int i = 1; i < pat.size(); i += 2) {
String p = pat.get(i), t = tok.get(i);
/*if (debug)
print("Checking " + p + " against " + t);*/
if ("*".equals(p))
result.add(t);
else if (!p.equalsIgnoreCase(t))
return null;
}
return result.toArray(new String[result.size()]);
}
static String shortenSnippetID(String snippetID) {
if (snippetID.startsWith("#"))
snippetID = snippetID.substring(1);
String httpBlaBla = "http://tinybrain.de/";
if (snippetID.startsWith(httpBlaBla))
snippetID = snippetID.substring(httpBlaBla.length());
return snippetID;
}
}