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CGRule.java
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CGRule.java
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/******************************
* Copyright (c) 2003--2024 Kevin Lano
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
* *****************************/
/* Package: CSTL */
/* Changed in 13.11.2021: metafeatures can consist of letters
*and* digits, eg. _1`2nd
*/
import java.util.Vector;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.*;
import java.io.*;
public class CGRule
{ String lhs;
String rhs;
Vector variables; // The _i or _*, _+ in the lhs --
// used to hold matched source elements
Vector rhsVariables = new Vector();
// The additional _i or _$ in the rhs --
// these are global variables.
Vector metafeatures; // The _i`f in rhs
String lhsop = "";
Expression lhsexp = null; // For expression rules
Vector lhsTokens = new Vector(); // String
Vector conditions = new Vector(); // of CGCondition
Vector actions = new Vector(); // of CGCondition
String lhspattern = ""; // The LHS string as a regex pattern
Vector lhspatternlist = new Vector();
String rulesetName = null; // ruleset owning the rule
public CGRule(Expression lexp, Expression rexp, Vector whens)
{ Vector lvars = lexp.metavariables();
Vector rvars = rexp.metavariables();
if (lvars.containsAll(rvars)) {}
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + lexp + " |--> " + rexp); }
lhs = lexp + "";
rhs = rexp + "";
variables = lvars;
conditions = whens;
metafeatures = metafeatures(rhs);
}
public CGRule(Expression lexp, String rgt, Vector whens)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
lhsexp = lexp;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = whens;
metafeatures = metafeatures(rhs);
}
public CGRule(Expression lexp, String rgt)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
lhsexp = lexp;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = new Vector();
metafeatures = metafeatures(rhs);
}
public CGRule(Statement lexp, String rgt, Vector whens)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = whens;
metafeatures = metafeatures(rhs);
}
public CGRule(Statement lexp, String rgt)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = new Vector();
metafeatures = metafeatures(rhs);
}
public CGRule(Type lexp, String rgt, Vector whens)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = whens;
metafeatures = metafeatures(rhs);
}
public CGRule(Type lexp, String rgt)
{ variables = lexp.metavariables();
lhs = lexp + "";
rhs = rgt;
Vector rvariables = metavariables(rgt);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this); }
conditions = new Vector();
metafeatures = metafeatures(rhs);
}
public CGRule(String ls, String rs, Vector vs, Vector whens)
{ lhs = ls;
rhs = rs;
variables = vs;
Vector rvariables = metavariables(rs);
rhsVariables = new Vector();
rhsVariables.addAll(rvariables);
rhsVariables.addAll(metavariables(whens));
rhsVariables.removeAll(variables);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this);
System.out.println(">> These will be treated as global variables: " + rhsVariables);
}
conditions = whens;
metafeatures = metafeatures(rhs);
}
public CGRule(String ls, String rs)
{ lhs = ls;
rhs = rs;
variables = metavariables(ls);
Vector rvariables = metavariables(rs);
rhsVariables = new Vector();
rhsVariables.addAll(rvariables);
rhsVariables.removeAll(variables);
if (variables.containsAll(rvariables)) { }
else
{ System.err.println("! Warning: some extra metavariables on RHS of " + this);
System.out.println(">> These will be treated as global variables: " + rhsVariables);
}
conditions = new Vector();
metafeatures = metafeatures(rhs);
String[] toks = ls.split(" ");
for (int i = 0; i < toks.length; i++)
{ lhsTokens.add(toks[i]); }
}
public void setRuleset(String rname)
{ rulesetName = rname; }
public void setActions(Vector acts)
{ actions = acts;
rhsVariables.addAll(metavariables(acts));
rhsVariables.removeAll(variables);
System.out.println(">> Global variables: " + rhsVariables);
}
public static boolean hasDefaultRule(Vector rules)
{ for (int i = 0; i < rules.size(); i++)
{ CGRule rr = (CGRule) rules.get(i);
if ("_0".equals(rr.lhs.trim()))
// &&
// "_0".equals(rr.rhs.trim()))
{ return true; }
}
return false;
} // Could add conditions.
public static String applyDefaultRule(Vector rules,
String str)
{ for (int i = 0; i < rules.size(); i++)
{ CGRule rr = (CGRule) rules.get(i);
if ("_0".equals(rr.lhs.trim()))
// &&
// "_0".equals(rr.rhs.trim()))
{ return rr.applyDefaultRule(str); }
}
return str;
} // Could add conditions.
public Vector getVariables()
{ return variables; }
public void setLHSTokens(Vector toks)
{ lhsTokens = toks; }
public boolean equalsLHS(CGRule r)
{ return r.lhs.equals(lhs); }
public int variableCount()
{ if (variables == null)
{ return 0; }
return variables.size();
}
public boolean hasVariables()
{ return variables != null && variables.size() > 0; }
public static Vector metavariables(String str)
{ Vector res = new Vector();
for (int i = 0; i < str.length() - 1; i++)
{ char c = str.charAt(i);
if ('_' == c & i + 2 < str.length() &&
Character.isDigit(str.charAt(i+1)) &&
Character.isDigit(str.charAt(i+2)))
{ res.add(c + "" + str.charAt(i+1) + "" +
str.charAt(i+2));
}
else if ('_' == c &&
Character.isDigit(str.charAt(i+1)))
{ res.add(c + "" + str.charAt(i+1)); }
}
if (str.indexOf("_*") > -1)
{ res.add("_*"); }
if (str.indexOf("_+") > -1)
{ res.add("_+"); }
if (str.indexOf("_$") > -1)
{ res.add("_$"); }
return res;
}
public static Vector metavariables(Vector conds)
{ Vector res = new Vector();
for (int i = 0; i < conds.size(); i++)
{ CGCondition cond = (CGCondition) conds.get(i);
Vector vbs = cond.metavariables();
res.addAll(vbs);
}
return res;
}
public static Vector metafeatures(String str)
{ Vector res = new Vector();
String substr = "" + str;
for (int i = 0; i <= 100; i++)
{ String var = "_" + i + "`";
if (i == 0)
{ var = "_*`"; }
else if (i == 100)
{ var = "_+`"; }
substr = "" + str;
while (substr.indexOf(var) > -1)
{ int j = substr.indexOf(var);
String f = var;
int varlength = var.length();
boolean found = false;
for (int k = j+varlength; k < substr.length() && !found; k++)
{ if (Character.isLetterOrDigit(substr.charAt(k)))
{ f = f + substr.charAt(k); }
else
{ if (res.contains(f)) { }
else
{ res.add(f); }
found = true;
}
}
System.out.println(">>> found metafeature " + f + " for " + var);
if (res.contains(f)) { }
else
{ res.add(f); }
substr = substr.substring(j+4);
}
}
return res;
} // look for identifier/with digits starting from the `
public String toString()
{ String res = lhs + " |-->" + rhs;
if (conditions != null && conditions.size() > 0)
{ res = res + "<when> ";
for (int i = 0; i < conditions.size(); i++)
{ CGCondition cnd = (CGCondition) conditions.get(i);
res = res + cnd;
if (i < conditions.size() - 1)
{ res = res + ", "; }
}
}
if (actions != null && actions.size() > 0)
{ res = res + "<action> ";
for (int i = 0; i < actions.size(); i++)
{ CGCondition cnd = (CGCondition) actions.get(i);
res = res + cnd;
if (i < actions.size() - 1)
{ res = res + ", "; }
}
}
return res;
}
public boolean equals(Object other)
{ if (other instanceof CGRule)
{ String ostring = (other + "").trim();
if (ostring.equals(toString().trim()))
{ return true; }
}
return false;
}
public int compareTo(CGRule r)
{ // r1.compareTo(r2) < 0
// means r1 is more specific than r2
String rlhs = (r.lhs + "").trim();
String selflhs = (lhs + "").trim();
if ("_*".equals(selflhs) ||
"_+".equals(selflhs))
{ return 1; } // always more general than others
if ("_*".equals(rlhs) ||
"_+".equals(rlhs))
{ return -1; }
if (rlhs.equals(selflhs))
{ if (conditions == null && r.conditions != null)
{ return 1; } // More general than r
if (conditions != null && r.conditions == null)
{ return -1; } // More specific than r
if (conditions != null && r.conditions != null &&
conditions.containsAll(r.conditions))
{ if (r.conditions.containsAll(conditions))
{ return 0; } // Conflict
else
{ return -1; } // more conditions, more specialised
}
if (conditions != null && r.conditions != null &&
r.conditions.containsAll(conditions))
{ return 1; } // r is more specialised
}
if (rlhs.indexOf(selflhs) >= 0 && !(rhs.equals(selflhs)))
{ // lhs is substring of rlhs,
// this rule is more general than r
// It must follow r if they are in one ruleset.
return 1;
}
if (lhsTokens.size() == r.lhsTokens.size() &&
variables.size() > r.variables.size())
{ // r has more non-variable terms, so is more specific
return 1;
}
if (lhsTokens.size() < r.lhsTokens.size() &&
variables.size() == r.variables.size())
{ // r has more non-variable terms, so is more specific
return 1;
}
/* if (r.variables.containsAll(variables) &&
r.variables.size() > variables.size())
{ // r has strictly more variables - so is more specific
return -1;
}
if (r.variables.size() > variables.size())
{ // r has strictly more variables - so is more specific
return -1;
} */
if (selflhs.indexOf(rlhs) >= 0 && !(selflhs.equals(rlhs)))
{ return -1; }
// this goes before r
if (lhsTokens.size() == r.lhsTokens.size() &&
variables.size() < r.variables.size())
{ // this has more non-variable terms, so is more specific
return -1;
}
if (lhsTokens.size() > r.lhsTokens.size() &&
variables.size() == r.variables.size())
{ // this has more non-variable terms, so is more specific
return -1;
}
/* if (variables.containsAll(r.variables) &&
variables.size() > r.variables.size())
{ // this has strictly more variables - so more specific
return 1;
}
if (variables.size() > r.variables.size())
{ // this has strictly more variables - more specific
return 1;
} */
return Integer.MAX_VALUE; // incomparable
}
public Expression getLhsExpression()
{ return lhsexp; }
public void addNewCGConditions(String cat, Expression expr,
Vector rulevars)
{ if (expr instanceof BinaryExpression)
{ BinaryExpression biexpr = (BinaryExpression) expr;
String oper = biexpr.getOperator();
if ("&".equals(oper))
{ Expression lexpr = biexpr.getLeft();
Expression rexpr = biexpr.getRight();
addNewCGConditions(cat, lexpr, rulevars);
addNewCGConditions(cat, rexpr, rulevars);
}
else
{ CGCondition cond =
CGCondition.newCGCondition(cat, expr, rulevars);
if (cond != null)
{ addCondition(cond); }
}
}
}
public void addCondition(CGCondition cond)
{ if (conditions == null)
{ conditions = new Vector(); }
conditions.add(cond);
}
public boolean hasCondition(String prop)
{ if (conditions == null)
{ return false; }
for (int x = 0; x < conditions.size(); x++)
{ CGCondition cond = (CGCondition) conditions.get(x);
if (prop.equalsIgnoreCase(cond.stereotype) && cond.positive)
{ return true; }
}
return false;
}
public boolean hasNegativeCondition(String prop)
{ if (conditions == null)
{ return false; }
for (int x = 0; x < conditions.size(); x++)
{ CGCondition cond = (CGCondition) conditions.get(x);
if (prop.equalsIgnoreCase(cond.stereotype) && !cond.positive)
{ return true; }
}
return false;
}
public boolean hasCondition(String prop, String var)
{ if (conditions == null)
{ return false; }
for (int x = 0; x < conditions.size(); x++)
{ CGCondition cond = (CGCondition) conditions.get(x);
if (prop.equalsIgnoreCase(cond.stereotype) && var.equals(cond.variable) && cond.positive)
{ return true; }
}
return false;
}
public boolean hasNoCondition()
{ if (conditions == null || conditions.size() == 0)
{ return true; }
return false;
}
public boolean satisfiesConditions(Vector eargs,
Vector entities, CGSpec cgs)
{ /* Vector newargs = new Vector();
for (int x = 0; x < variables.size() && x < args.size();
x++)
{ String arg = (String) args.get(x);
String arg1 = correctNewlines(arg);
newargs.add(arg1);
} // Assuming the variables occur in same order as args
*/
return CGCondition.conditionsSatisfied(
conditions,
variables,eargs,entities,
cgs,rhsVariables);
} // actually pass the rule in also, or the variables
public boolean satisfiesAllConditions(Vector args,
Vector eargs,
Vector entities, CGSpec cgs)
{ Vector newargs = new Vector();
for (int x = 0; x < variables.size() && x < args.size();
x++)
{ String arg = (String) args.get(x);
String arg1 = correctNewlines(arg);
newargs.add(arg1);
} // Assuming the variables occur in same order as args
return CGCondition.allConditionsSatisfied(this,
conditions,variables,
eargs,newargs,entities,cgs,rhsVariables);
}
public int variablePosition(String var)
{ // The index of var in the arguments in the LHS
// Eg., index of _3 in _* ADD _3 is 2.
// System.out.println(">>> Trying to find variable position of " + var + " in " + lhsTokens);
// System.out.println();
if (lhsTokens.size() == 0)
{ String kstring = var.substring(1);
int k = Integer.parseInt(kstring);
return k;
} // Should never occur.
int varCount = 0;
for (int i = 0; i < lhsTokens.size(); i++)
{ String tok = (String) lhsTokens.get(i);
if (var.equals(tok))
{ return varCount+1; }
if (tok.startsWith("_") &&
tok.length() >= 2 &&
tok.length() <= 3 &&
(tok.charAt(1) == '*' ||
tok.charAt(1) == '+' ||
Character.isDigit(tok.charAt(1))))
{ varCount++; } // also 2-digit ones _ij
}
return -1;
}
public void replaceParameter(String str)
{ // Replaces _$ by str
lhs = (lhs + "").replace("_$", str);
rhs = (rhs + "").replace("_$", str);
}
public String applyRule(Vector args)
{ // substitute variables[i] by args[i] in rhs
String res = rhs + "";
for (int x = 0; x < args.size() && x < variables.size(); x++)
{ String var = (String) variables.get(x);
String arg = (String) args.get(x);
String arg1 = correctNewlines(arg);
// System.out.println(">--> Replacing " + var + " by " + arg1);
// res = res.replaceAll(var,arg1); For old Java version
res = res.replace(var,arg1);
}
return res;
}
public String applyDefaultRule(String arg)
{ // substitute _0 by arg in rhs
String res = rhs + "";
String arg1 = correctNewlines(arg);
res = res.replace("_0",arg1);
return res;
}
public static String applyMetafeature(String mffeat,
ASTTerm term,
CGSpec cgs, Vector entities)
{ System.out.println(">***> Applying " + mffeat + " to ASTTerm " + term);
System.out.println();
/* JOptionPane.showMessageDialog(null,
"Trying to compute: " + mffeat + " of: " + term +
" in: " + ASTTerm.metafeatures, "",
JOptionPane.INFORMATION_MESSAGE); */
ASTTerm obj = term;
if (CSTL.hasTemplate(mffeat + ".cstl"))
{ CGSpec template = CSTL.getTemplate(mffeat + ".cstl");
if (template != null)
{ System.out.println(">>> Applying CSTL script " + mffeat + ".cstl to " + term);
String repl = null;
repl = term.cg(template);
return repl;
}
}
if ("type".equals(mffeat))
{ String repl = ASTTerm.getType(term);
if (repl == null)
{ Type tt = term.deduceType();
repl = tt + "";
}
return repl;
}
if ("hashCode".equals(mffeat))
{ return "" + term.hashCode(); }
if ("trimQuotes".equals(mffeat))
{ String rep = term.cg(cgs);
if (rep.endsWith("\""))
{ rep = rep.substring(0,rep.length()-1); }
if (rep.startsWith("\""))
{ rep = rep.substring(1); }
return rep;
}
if ("first".equals(mffeat) ||
"1st".equals(mffeat) ||
"1".equals(mffeat))
{ // get first subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 0)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(0);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(0);
}
String replx = term.cg(cgs);
return replx;
}
if ("second".equals(mffeat) ||
"2nd".equals(mffeat) ||
"2".equals(mffeat))
{ // get second subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 1)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(1);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(1);
}
}
if ("third".equals(mffeat) ||
"3rd".equals(mffeat) ||
"3".equals(mffeat))
{ // get third subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 2)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(2);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(2);
}
}
if ("fourth".equals(mffeat) ||
"4th".equals(mffeat) ||
"4".equals(mffeat))
{ // get 4th subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 3)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(3);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(3);
}
}
if ("fifth".equals(mffeat) ||
"5th".equals(mffeat) ||
"5".equals(mffeat))
{ // get 5th subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 4)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(4);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(4);
}
}
if ("sixth".equals(mffeat) ||
"6th".equals(mffeat) ||
"6".equals(mffeat))
{ // get 6th subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 5)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(5);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(5);
}
}
if ("seventh".equals(mffeat) ||
"7th".equals(mffeat) ||
"7".equals(mffeat))
{ // get 7th subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
if (ct.terms.size() > 6)
{ ASTTerm ct1 = (ASTTerm) ct.terms.get(6);
String repl = ct1.cg(cgs);
return repl;
}
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
return "" + st.symbol.charAt(6);
}
}
if ("last".equals(mffeat))
{ // get last subterm of obj
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
int tsize = ct.terms.size();
ASTTerm ct1 = (ASTTerm) ct.terms.get(tsize-1);
String repl = ct1.cg(cgs);
return repl;
}
if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
int ssize = st.symbol.length();
return "" + st.symbol.charAt(ssize-1);
}
}
if ("tail".equals(mffeat))
{ // Vector of terms except the first
if (term instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) term;
Vector tailterms = new Vector();
tailterms.addAll(ct.terms);
String repl = "";
for (int q = 1; q < tailterms.size(); q++)
{ ASTTerm ct1 = (ASTTerm) tailterms.get(q);
String tcg = ct1.cg(cgs);
repl = repl + tcg;
}
return repl;
}
else if (term instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
String symb = st.getSymbol();
return symb.substring(1);
}
}
if ("tailtail".equals(mffeat) ||
"tail2".equals(mffeat))
{ // Vector of terms except the first 2
if (obj instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) obj;
Vector tailterms = new Vector();
tailterms.addAll(ct.terms);
String repl = "";
for (int q = 2; q < tailterms.size(); q++)
{ ASTTerm ct1 = (ASTTerm) tailterms.get(q);
String tcg = ct1.cg(cgs);
repl = repl + tcg;
}
return repl;
}
else if (obj instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
String symb = st.getSymbol();
return symb.substring(2);
}
}
if ("tailtailtail".equals(mffeat) ||
"tail3".equals(mffeat))
{ // Vector of terms except the first 3
if (obj instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) obj;
Vector tailterms = new Vector();
tailterms.addAll(ct.terms);
String repl = "";
for (int q = 3; q < tailterms.size(); q++)
{ ASTTerm ct1 = (ASTTerm) tailterms.get(q);
String tcg = ct1.cg(cgs);
repl = repl + tcg;
}
return repl;
}
else if (obj instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) term;
String symb = st.getSymbol();
return symb.substring(3);
}
}
if ("tailtailtailtail".equals(mffeat) ||
"tail4".equals(mffeat))
{ // Vector of terms except the first 4
if (obj instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) obj;
Vector tailterms = new Vector();
tailterms.addAll(ct.terms);
String repl = "";
for (int q = 4; q < tailterms.size(); q++)
{ ASTTerm ct1 = (ASTTerm) tailterms.get(q);
String tcg = ct1.cg(cgs);
repl = repl + tcg;
}
return repl;
}
else if (obj instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) obj;
String symb = st.getSymbol();
return symb.substring(4);
}
}
if ("front".equals(mffeat))
{ // Vector of terms except the last
if (obj instanceof ASTCompositeTerm)
{ ASTCompositeTerm ct = (ASTCompositeTerm) obj;
Vector tailterms = new Vector();
tailterms.addAll(ct.terms);
String repl = "";
for (int q = 0; q < tailterms.size() - 1; q++)
{ ASTTerm ct1 = (ASTTerm) tailterms.get(q);
String tcg = ct1.cg(cgs);
repl = repl + tcg;
}
return repl;
}
else if (obj instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) obj;
String symb = st.getSymbol();
return symb.substring(0,symb.length()-1);
}
}
if ("toInteger".equals(mffeat) &&
obj instanceof ASTSymbolTerm)
{ ASTSymbolTerm st = (ASTSymbolTerm) obj;
String symb = st.getSymbol();
return Expression.convertInteger(symb) + "";
}
if (cgs.hasRuleset(mffeat))
{ // System.out.println(">***> Valid ruleset " + mffeat);
System.out.println();
String repl = cgs.applyRuleset(mffeat,term);
System.out.println(">***> Applying ruleset " + mffeat + " to ASTTerm " + term);
System.out.println();
if (repl != null)
{ return repl; }
else
{ System.out.println(">!!!> cannot apply ruleset: " + mffeat + " to " + term);
if (term.hasMetafeature(mffeat))
{ String replx = term.getMetafeatureValue(mffeat);
if (replx != null)
{ return replx; }
else
{ System.out.println(">!!!> no metafeature: " + mffeat + " of " + term);
}
}
else if (ASTTerm.hasTaggedValue(term,mffeat))
{ String replx = ASTTerm.getTaggedValue(term,mffeat);
if (replx != null)
{ return replx; }
else
{ System.out.println(">!!!> no tagged value: " + mffeat + " of " + term);
}
}
else if (term instanceof ASTSymbolTerm)
{ String replx =
((ASTSymbolTerm) term).getSymbol();
return replx;
} // specialised symbol functions go here.
else if (CSTL.hasTemplate(mffeat + ".cstl"))
{ System.out.println(">>> Template exists: " +
mffeat + ".cstl");
CGSpec newcgs = CSTL.getTemplate(mffeat + ".cstl");
System.out.println();
String replx = term.cg(newcgs);
if (replx != null)
{ return replx; }
}
else
{ System.out.println("!! No template " + mffeat + ".cstl exists");
System.out.println(">>> Trying to load template ./cg/" + mffeat + ".cstl");
System.out.println();
File sub = new File("./cg/" + mffeat + ".cstl");
Vector types = new Vector(); // CGTL.types;
CGSpec newcgs = new CGSpec(entities,types);
CGSpec xcgs =
CSTL.loadCSTL(newcgs,sub,types,entities);
if (xcgs != null)
{ CSTL.addTemplate(mffeat + ".cstl", xcgs);
String rpl = term.cg(xcgs);