source: branches/streams/abcl/src/org/armedbear/lisp/scripting/AbclScriptEngineFactory.java

/*
 * AbclScriptEngineFactory.java
 *
 * Copyright (C) 2008 Alessio Stalla
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package org.armedbear.lisp.scripting;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import javax.script.ScriptEngine;
import javax.script.ScriptEngineFactory;

public class AbclScriptEngineFactory implements ScriptEngineFactory {

    private static AbclScriptEngine THE_ONLY_ONE_ENGINE = null;
  
    public String getEngineName() {
  return "ABCL Script";
    }

    public String getEngineVersion() {
  return "0.1";
    }

    public List<String> getExtensions() {
  List<String> extensions = new ArrayList<String>(1);
  extensions.add("lisp");
  return Collections.unmodifiableList(extensions);
    }

    public String getLanguageName() {
  return "ANSI Common Lisp";
    }

    public String getLanguageVersion() {
  return "ANSI X3.226:1994";
    }

    public static String escape(String raw) {
  StringBuilder sb = new StringBuilder();
  int len = raw.length();
  char c;
  for(int i = 0; i < len; ++i) {
      c = raw.charAt(i);
      if(c != '"') {
    sb.append(c);
      } else {
    sb.append("\\\"");
      }
  }
  return sb.toString();
    }
  
    public String getMethodCallSyntax(String obj, String method, String... args) {
  StringBuilder sb = new StringBuilder();
  sb.append("(jcall \"");
  sb.append(method);
  sb.append("\" ");
  sb.append(obj);
  for(String arg : args) {
      sb.append(" ");
      sb.append(arg);
  }
  sb.append(")");
  return sb.toString();
    }
    
    public List<String> getMimeTypes() {
  return Collections.unmodifiableList(new ArrayList<String>());
    }

    public List<String> getNames() {
  List<String> names = new ArrayList<String>(1);
  names.add("ABCL");
  names.add("cl");
  names.add("Lisp");
  names.add("Common Lisp");
  return Collections.unmodifiableList(names);
    }

    public String getOutputStatement(String str) {
  return "(cl:print \"" + str + "\")";
    }

    public Object getParameter(String key) {
  // TODO Auto-generated method stub
  return null;
    }

    public String getProgram(String... statements) {
  StringBuilder sb = new StringBuilder();
  sb.append("(cl:progn");
  for(String stmt : statements) {
      sb.append("\n\t");
      sb.append(stmt);
  }
  sb.append(")");
  return sb.toString();
    }
    
    public synchronized ScriptEngine getScriptEngine() {
        if (THE_ONLY_ONE_ENGINE == null) {
            THE_ONLY_ONE_ENGINE = new AbclScriptEngine();
        }
  return THE_ONLY_ONE_ENGINE;
    }

}