js-scripts/scripts/runjshelp.js

#! /usr/bin/env runjs
var System = java.lang.System;
var JarFile = java.util.jar.JarFile;
var StringUtil = Packages.me.hatter.tools.commons.string.StringUtil;
var StandaloneMainInteractive = Packages.me.hatter.tools.jssp.main.StandaloneMainInteractive;
var ConsoleReadTool = Packages.me.hatter.tools.commons.console.ConsoleReadTool;
var ClassLoaderUtil = Packages.me.hatter.tools.commons.classloader.ClassLoaderUtil;
var ReflectUtil = Packages.me.hatter.tools.commons.reflect.ReflectUtil;

var searchClasses = (systemClassLoader) => {
  var classes = [];
  $ARRAY(systemClassLoader.getURLs()).forEach((u) => {
    var jarFile = new JarFile(u.getFile());
    var jarEntryEnum = jarFile.entries();
    while (jarEntryEnum.hasMoreElements()) {
      var jarFileEntry = jarEntryEnum.nextElement();
      var jarFileEntryName = jarFileEntry.getName();
      if (jarFileEntryName.endsWith('.class')) {
        classes.push(jarFileEntryName);
      }
    }
  });
  return classes;
};

var convertFileNameToClasName = (c) => {
  if (c.endsWith('.class')) {
    c = c.substring(0, c.length - 6);
  }
  if (c.contains('/')) {
    c = c.replace(/\//g, '.');
  }
  return c;
};

var getShortClassName = (c) => {
  var lastDot = c.lastIndexOf('.');
  return c.substring(lastDot + 1);
};

var isMatchCommandFilter = (c, fullCommandLines) => {
  if (fullCommandLines.length > 1) {
    for (var i = 1; i < fullCommandLines.length; i++) {
      var filterCmd = fullCommandLines[i];
      var isMatchShortClassName = filterCmd.startsWith('S');
      filterCmd = filterCmd.substring(1);
      var matchClassName = isMatchShortClassName? getShortClassName(convertFileNameToClasName(c)): c;
      if (!matchClassName.toLowerCase().contains(filterCmd.toLowerCase())) {
        return false;
     }
    }
  }
  return true;
};

var main = () => {
  StandaloneMainInteractive.initJLine();
  var systemClassLoader = ClassLoaderUtil.getSystemClassLoader();

  ConsoleReadTool.from('usage> ').loop((ln) => {
    var fullCommandLine = $STR(ln);
    var fullCommandLines = fullCommandLine.split(/\s+/);
    var cmd = fullCommandLines[0];
    if ($$.asList('ls', 'll', 'list').contains(cmd)) {
      $ARRAY(systemClassLoader.getURLs()).forEach((u) => {
        println(u);
      });
    } else if ($$.asList('exit', 'quit').contains(cmd)) {
      println('+ Bye!');
      System.exit(0);
    } else if ($$.asList('desc', 'describe').contains(cmd)) {
      if (fullCommandLines.length == 1) {
        println('Cmd format error.')
      } else {
        var c = convertFileNameToClasName(fullCommandLines[1]);
        try {
          var cls = $$.clazz(c);
          var fields = $ARRAY(ReflectUtil.getDeclaredFields(cls));
          if (fields && (fields.length > 0)) {
            println('Field(s):');
            fields.forEach((f) => {
              println('    ' + f);
            });
          }
          var methods = $ARRAY(ReflectUtil.getDeclaredMethods(cls));
          if (methods && (methods.length > 0)) {
            println('Method(s):');
            methods.forEach((m) => {
              println('    ' + m);
            });
          }
        } catch (e) {
          println('Error in desc : ' + c);
        }
      }
    } else if ($$.asList('search').contains(cmd)) {
      searchClasses(systemClassLoader).forEach((c) => {
        if (!isMatchCommandFilter(c, fullCommandLines)) {
          return;
        }
        println(c);
      });
    } else if ($$.asList('import').contains(cmd)) {
      searchClasses(systemClassLoader).forEach((c) => {
        if (!isMatchCommandFilter(c, fullCommandLines)) {
          return;
        }
        var className = convertFileNameToClasName(c);
        var showClassName = getShortClassName(className);
        println('var ' + showClassName + ' = ' + (className.startsWith('java.')? '': 'Packages.') + className + ';');
      });
    } else if ($$.asList('require').contains(cmd)) {
      if (fullCommandLines.length == 1) {
        println('Cmd format error.');
      } else {
        for (var i = 1; i < fullCommandLines.length; i++) {
          requireJAR(fullCommandLines[i]);
        }
      }
    } else if ($$.asList('tree').contains(cmd)) {
      var classMap = $$.treeMap();
      searchClasses(systemClassLoader).forEach((c) => {
        if (!isMatchCommandFilter(c, fullCommandLines)) {
          return;
        }
        var className = c.substring(0, c.length - 6);
        var classNames = className.split('\/');
        var baseMap = classMap;
        $ARRAY(classNames).forEach((p) => {
          var m = baseMap.get(p);
          if (m == null) {
            m = $$.treeMap();
            baseMap.put(p, m);
          }
          baseMap = m;
        });
      });
      var depth = 0;
      var printMap = (m) => {
        $ARRAY(m.keySet()).forEach((p) => {
          var m2 = m.get(p);
          var hasSub = (m2 != null) && (!m2.isEmpty());
          println(StringUtil.repeat(' ', depth) + p + (hasSub? '.': ''));
          if (hasSub) {
            depth += p.length + 1;
            printMap(m2);
            depth -= p.length + 1;
          }
        });
      };
      println(classMap.size());
      printMap(classMap);
    } else {
      if (cmd != '') {
        println('Unknow command: ' + cmd);
      }
    }
  });
};

main();