src/jdk/nashorn/internal/runtime/FinalScriptFunctionData.java

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  24  */
  25 
  26 package jdk.nashorn.internal.runtime;
  27 
  28 import static jdk.nashorn.internal.lookup.Lookup.MH;
  29 
  30 import java.lang.invoke.MethodHandle;
  31 
  32 /**
  33  * This is a subclass that represents a script function that may not be regenerated.
  34  * This is used for example for bound functions and builtins.
  35  */
  36 final class FinalScriptFunctionData extends ScriptFunctionData {
  37 
  38     /**
  39      * Constructor - used for bind
  40      *
  41      * @param name          name
  42      * @param arity         arity
  43      * @param functions     precompiled code
  44      * @param isStrict      strict
  45      * @param isBuiltin     builtin
  46      * @param isConstructor constructor
  47      */
  48     FinalScriptFunctionData(final String name, int arity, CompiledFunctions functions, final boolean isStrict, final boolean isBuiltin, final boolean isConstructor) {
  49         super(name, arity, isStrict, isBuiltin, isConstructor);
  50         code.addAll(functions);
  51     }
  52 
  53     /**
  54      * Constructor - used from ScriptFunction. This assumes that we have code alraedy for the
  55      * method (typically a native method) and possibly specializations.
  56      *
  57      * @param name           name
  58      * @param mh             method handle for generic version of method
  59      * @param specs          specializations
  60      * @param isStrict       strict
  61      * @param isBuiltin      builtin
  62      * @param isConstructor  constructor
  63      */
  64     FinalScriptFunctionData(final String name, final MethodHandle mh, final MethodHandle[] specs, final boolean isStrict, final boolean isBuiltin, final boolean isConstructor) {
  65         super(name, arity(mh), isStrict, isBuiltin, isConstructor);
  66 
  67         addInvoker(mh);
  68         if (specs != null) {
  69             for (final MethodHandle spec : specs) {
  70                 addInvoker(spec);
  71             }
  72         }
  73     }
  74 
  75     private void addInvoker(final MethodHandle mh) {
  76         if (isConstructor(mh)) {
  77             // only nasgen constructors: (boolean, self, args) are subject to binding a boolean newObj. isConstructor
  78             // is too conservative a check. However, isConstructor(mh) always implies isConstructor param
  79             assert isConstructor();
  80             final MethodHandle invoker = MH.insertArguments(mh, 0, false);
  81             final MethodHandle constructor = composeConstructor(MH.insertArguments(mh, 0, true));
  82             code.add(new CompiledFunction(mh.type(), invoker, constructor));
  83         } else {
  84             code.add(new CompiledFunction(mh.type(), mh));
  85         }


  24  */
  25 
  26 package jdk.nashorn.internal.runtime;
  27 
  28 import static jdk.nashorn.internal.lookup.Lookup.MH;
  29 
  30 import java.lang.invoke.MethodHandle;
  31 
  32 /**
  33  * This is a subclass that represents a script function that may not be regenerated.
  34  * This is used for example for bound functions and builtins.
  35  */
  36 final class FinalScriptFunctionData extends ScriptFunctionData {
  37 
  38     /**
  39      * Constructor - used for bind
  40      *
  41      * @param name      name
  42      * @param arity     arity
  43      * @param functions precompiled code
  44      * @param flags     {@link ScriptFunctionData} flags


  45      */
  46     FinalScriptFunctionData(final String name, final int arity, final CompiledFunctions functions, final int flags) {
  47         super(name, arity, flags);
  48         code.addAll(functions);
  49     }
  50 
  51     /**
  52      * Constructor - used from ScriptFunction. This assumes that we have code already for the
  53      * method (typically a native method) and possibly specializations.
  54      *
  55      * @param name  name
  56      * @param mh    method handle for generic version of method
  57      * @param specs specializations
  58      * @param flags {@link ScriptFunctionData} flags


  59      */
  60     FinalScriptFunctionData(final String name, final MethodHandle mh, final MethodHandle[] specs, final int flags) {
  61         super(name, arity(mh), flags);
  62 
  63         addInvoker(mh);
  64         if (specs != null) {
  65             for (final MethodHandle spec : specs) {
  66                 addInvoker(spec);
  67             }
  68         }
  69     }
  70 
  71     private void addInvoker(final MethodHandle mh) {
  72         if (isConstructor(mh)) {
  73             // only nasgen constructors: (boolean, self, args) are subject to binding a boolean newObj. isConstructor
  74             // is too conservative a check. However, isConstructor(mh) always implies isConstructor param
  75             assert isConstructor();
  76             final MethodHandle invoker = MH.insertArguments(mh, 0, false);
  77             final MethodHandle constructor = composeConstructor(MH.insertArguments(mh, 0, true));
  78             code.add(new CompiledFunction(mh.type(), invoker, constructor));
  79         } else {
  80             code.add(new CompiledFunction(mh.type(), mh));
  81         }