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https://issues.apache.org/jira/browse/GROOVY-8989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Eric Milles resolved GROOVY-8989.
---------------------------------
Resolution: Duplicate
> Support native interface default method
> ---------------------------------------
>
> Key: GROOVY-8989
> URL: https://issues.apache.org/jira/browse/GROOVY-8989
> Project: Groovy
> Issue Type: Improvement
> Reporter: Daniel Sun
> Priority: Major
>
> Currently, interface default methods are implemented using traits, i.e. the
> implementation is not native interface default methods. We must refine the
> implementation before 3.0.0 final released.
> As MOP needs to additional methods like the following, some of which are
> {{private}}, so we maybe have to generate bytecode of Java9+ version. As a
> result, Java9+ is required to run.
> {code:java}
> // access flags 0x1004
> protected synthetic $getStaticMetaClass()Lgroovy/lang/MetaClass;
> ALOAD 0
> INVOKEVIRTUAL java/lang/Object.getClass ()Ljava/lang/Class;
> LDC LA;.class
> IF_ACMPEQ L0
> ALOAD 0
> INVOKESTATIC
> org/codehaus/groovy/runtime/ScriptBytecodeAdapter.initMetaClass
> (Ljava/lang/Object;)Lgroovy/lang/MetaClass;
> ARETURN
> L0
> FRAME SAME
> GETSTATIC A.$staticClassInfo : Lorg/codehaus/groovy/reflection/ClassInfo;
> ASTORE 1
> ALOAD 1
> IFNONNULL L1
> ALOAD 0
> INVOKEVIRTUAL java/lang/Object.getClass ()Ljava/lang/Class;
> INVOKESTATIC org/codehaus/groovy/reflection/ClassInfo.getClassInfo
> (Ljava/lang/Class;)Lorg/codehaus/groovy/reflection/ClassInfo;
> DUP
> ASTORE 1
> PUTSTATIC A.$staticClassInfo : Lorg/codehaus/groovy/reflection/ClassInfo;
> L1
> FRAME APPEND [org/codehaus/groovy/reflection/ClassInfo]
> ALOAD 1
> INVOKEVIRTUAL org/codehaus/groovy/reflection/ClassInfo.getMetaClass
> ()Lgroovy/lang/MetaClass;
> ARETURN
> MAXSTACK = 2
> MAXLOCALS = 2
> // access flags 0x1
> public getMetaClass()Lgroovy/lang/MetaClass;
> @Lgroovy/transform/Generated;()
> @Lgroovy/transform/Internal;()
> ALOAD 0
> GETFIELD A.metaClass : Lgroovy/lang/MetaClass;
> DUP
> IFNULL L0
> ARETURN
> L0
> FRAME SAME1 groovy/lang/MetaClass
> POP
> ALOAD 0
> DUP
> INVOKEVIRTUAL A.$getStaticMetaClass ()Lgroovy/lang/MetaClass;
> PUTFIELD A.metaClass : Lgroovy/lang/MetaClass;
> ALOAD 0
> GETFIELD A.metaClass : Lgroovy/lang/MetaClass;
> ARETURN
> MAXSTACK = 2
> MAXLOCALS = 1
> // access flags 0x1
> public setMetaClass(Lgroovy/lang/MetaClass;)V
> @Lgroovy/transform/Generated;()
> @Lgroovy/transform/Internal;()
> ALOAD 0
> ALOAD 1
> PUTFIELD A.metaClass : Lgroovy/lang/MetaClass;
> RETURN
> MAXSTACK = 2
> MAXLOCALS = 2
> // access flags 0x1
> public invokeMethod(Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;
> @Lgroovy/transform/Generated;()
> @Lgroovy/transform/Internal;()
> ALOAD 0
> INVOKEVIRTUAL A.getMetaClass ()Lgroovy/lang/MetaClass;
> ALOAD 0
> ALOAD 1
> ALOAD 2
> INVOKEINTERFACE groovy/lang/MetaClass.invokeMethod
> (Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)Ljava/lang/Object;
> (itf)
> ARETURN
> MAXSTACK = 4
> MAXLOCALS = 3
> // access flags 0x1
> public getProperty(Ljava/lang/String;)Ljava/lang/Object;
> @Lgroovy/transform/Generated;()
> @Lgroovy/transform/Internal;()
> ALOAD 0
> INVOKEVIRTUAL A.getMetaClass ()Lgroovy/lang/MetaClass;
> ALOAD 0
> ALOAD 1
> INVOKEINTERFACE groovy/lang/MetaClass.getProperty
> (Ljava/lang/Object;Ljava/lang/String;)Ljava/lang/Object; (itf)
> ARETURN
> MAXSTACK = 3
> MAXLOCALS = 2
> // access flags 0x1
> public setProperty(Ljava/lang/String;Ljava/lang/Object;)V
> @Lgroovy/transform/Generated;()
> @Lgroovy/transform/Internal;()
> ALOAD 0
> INVOKEVIRTUAL A.getMetaClass ()Lgroovy/lang/MetaClass;
> ALOAD 0
> ALOAD 1
> ALOAD 2
> INVOKEINTERFACE groovy/lang/MetaClass.setProperty
> (Ljava/lang/Object;Ljava/lang/String;Ljava/lang/Object;)V (itf)
> RETURN
> MAXSTACK = 4
> MAXLOCALS = 3
> // access flags 0x100A
> private static synthetic $createCallSiteArray_1([Ljava/lang/String;)V
> ALOAD 0
> LDC 0
> LDC "println"
> AASTORE
> RETURN
> MAXSTACK = 3
> MAXLOCALS = 1
> // access flags 0x100A
> private static synthetic
> $createCallSiteArray()Lorg/codehaus/groovy/runtime/callsite/CallSiteArray;
> LDC 1
> ANEWARRAY java/lang/String
> ASTORE 0
> ALOAD 0
> INVOKESTATIC A.$createCallSiteArray_1 ([Ljava/lang/String;)V
> NEW org/codehaus/groovy/runtime/callsite/CallSiteArray
> DUP
> LDC LA;.class
> ALOAD 0
> INVOKESPECIAL org/codehaus/groovy/runtime/callsite/CallSiteArray.<init>
> (Ljava/lang/Class;[Ljava/lang/String;)V
> ARETURN
> MAXSTACK = 4
> MAXLOCALS = 1
> // access flags 0x100A
> private static synthetic
> $getCallSiteArray()[Lorg/codehaus/groovy/runtime/callsite/CallSite;
> GETSTATIC A.$callSiteArray : Ljava/lang/ref/SoftReference;
> IFNULL L0
> GETSTATIC A.$callSiteArray : Ljava/lang/ref/SoftReference;
> INVOKEVIRTUAL java/lang/ref/SoftReference.get ()Ljava/lang/Object;
> CHECKCAST org/codehaus/groovy/runtime/callsite/CallSiteArray
> DUP
> ASTORE 0
> IFNONNULL L1
> L0
> FRAME SAME
> INVOKESTATIC A.$createCallSiteArray
> ()Lorg/codehaus/groovy/runtime/callsite/CallSiteArray;
> ASTORE 0
> NEW java/lang/ref/SoftReference
> DUP
> ALOAD 0
> INVOKESPECIAL java/lang/ref/SoftReference.<init> (Ljava/lang/Object;)V
> PUTSTATIC A.$callSiteArray : Ljava/lang/ref/SoftReference;
> L1
> FRAME APPEND [org/codehaus/groovy/runtime/callsite/CallSiteArray]
> ALOAD 0
> GETFIELD org/codehaus/groovy/runtime/callsite/CallSiteArray.array :
> [Lorg/codehaus/groovy/runtime/callsite/CallSite;
> ARETURN
> MAXSTACK = 3
> MAXLOCALS = 1
> {code}
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