LoggingModule.java

   1 package org.simantics.scl.compiler.elaboration.java;
   2
   3 import org.cojen.classfile.TypeDesc;
   4 import org.osgi.service.component.annotations.Component;
   5 import org.simantics.scl.compiler.commands.CommandSession;
   6 import org.simantics.scl.compiler.common.names.Name;
   7 import org.simantics.scl.compiler.constants.JavaMethod;
   8 import org.simantics.scl.compiler.elaboration.contexts.SimplificationContext;
   9 import org.simantics.scl.compiler.elaboration.expressions.EApply;
  10 import org.simantics.scl.compiler.elaboration.expressions.EExternalConstant;
  11 import org.simantics.scl.compiler.elaboration.expressions.ELiteral;
  12 import org.simantics.scl.compiler.elaboration.expressions.Expression;
  13 import org.simantics.scl.compiler.elaboration.macros.MacroRule;
  14 import org.simantics.scl.compiler.elaboration.modules.SCLValue;
  15 import org.simantics.scl.compiler.internal.codegen.types.StandardTypeConstructor;
  16 import org.simantics.scl.compiler.module.ConcreteModule;
  17 import org.simantics.scl.compiler.types.TCon;
  18 import org.simantics.scl.compiler.types.Type;
  19 import org.simantics.scl.compiler.types.Types;
  20 import org.simantics.scl.compiler.types.kinds.Kinds;
  21 import org.slf4j.Logger;
  22 import org.slf4j.LoggerFactory;
  23
  24 @Component
  25 public class LoggingModule extends ConcreteModule {
  26
  27     private static String[] LOGGING_METHODS = new String[] {
  28             "trace", "debug", "info", "warn", "error"
  29     };
  30
  31     public LoggingModule() {
  32         super("Logging");
  33
  34         // Logger
  35         TCon Logger = Types.con(getName(), "Logger");
  36         StandardTypeConstructor loggerConstructor = new StandardTypeConstructor(Logger, Kinds.STAR, TypeDesc.forClass(Logger.class));
  37         loggerConstructor.external = true;
  38         addTypeDescriptor("Logger", loggerConstructor);
  39
  40         // Common types
  41         Type loggingType = Types.functionE(Types.STRING, Types.PROC, Types.UNIT);
  42
  43         // Add logging methods
  44         for(String methodName : LOGGING_METHODS) {
  45             JavaMethod javaMethod = new JavaMethod(false, "org/slf4j/Logger", methodName, Types.PROC, Types.UNIT, Logger, Types.STRING);
  46             SCLValue value = new SCLValue(Name.create(getName(), methodName));
  47             value.setType(loggingType);
  48             value.setMacroRule(new MacroRule() {
  49                 @Override
  50                 public Expression apply(SimplificationContext context, Type[] typeParameters, EApply apply) {
  51                     ConcreteModule module = context.getCompilationContext().module;
  52                     String identifier;
  53                     if (module != null)
  54                         identifier = module.getName().replaceAll("/", ".");
  55                     else
  56                         identifier = CommandSession.class.getName();
  57                     apply.set(new ELiteral(javaMethod), new Expression[] {
  58                             new EExternalConstant(LoggerFactory.getLogger(identifier), Logger),
  59                             apply.parameters[0]
  60                     });
  61                     return apply;
  62                 }
  63             });
  64             addValue(value);
  65         }
  66
  67         setParentClassLoader(LoggerFactory.class.getClassLoader());
  68     }
  69
  70 }