Discriminate record component accessors by using a dedicated purpose code RecordComponentReadAccess (eclipse-jdt#4136)

Author: srikanth-sankaran

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/ClassFile.java

@@ -983,6 +983,7 @@ public void addSpecialMethods(TypeDeclaration typeDecl) {
 				for (int i = emittedSyntheticsCount, max = currentSyntheticsCount; i < max; i++) {
 					SyntheticMethodBinding syntheticMethod = syntheticMethods[i];
 					switch (syntheticMethod.purpose) {
+						case SyntheticMethodBinding.RecordComponentReadAccess :
 						case SyntheticMethodBinding.FieldReadAccess :
 						case SyntheticMethodBinding.SuperFieldReadAccess :
 							// generate a method info to emulate an reading access to

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/lookup/ImplicitNullAnnotationVerifier.java

@@ -284,7 +284,7 @@ void checkNullSpecInheritance(MethodBinding currentMethod, AbstractMethodDeclara
 								} else if (currentMethod instanceof SyntheticMethodBinding) {
 									SyntheticMethodBinding synth = (SyntheticMethodBinding) currentMethod;
 									switch (synth.purpose) {
-										case SyntheticMethodBinding.FieldReadAccess:
+										case SyntheticMethodBinding.RecordComponentReadAccess:
 											if (synth.recordComponentBinding != null) {
 												RecordComponent sourceRecordComponent = synth.sourceRecordComponent();
 												if (sourceRecordComponent != null)

org.eclipse.jdt.core.compiler.batch/src/org/eclipse/jdt/internal/compiler/lookup/SyntheticMethodBinding.java

@@ -81,6 +81,7 @@ public class SyntheticMethodBinding extends MethodBinding {
     public static final int RecordOverrideHashCode = 20;
     public static final int RecordOverrideEquals = 21;
     public static final int RecordCanonicalConstructor = 22;
+    public final static int RecordComponentReadAccess = 23;
 
 	public int sourceStart = 0; // start position of the matching declaration
 	public int index; // used for sorting access methods in the class file
@@ -530,7 +531,7 @@ public SyntheticMethodBinding(SourceTypeBinding declaringClass, RecordComponentB
 		this.selector = rcb.name;
 		this.recordComponentBinding = rcb;
 		this.targetReadField = rcb;
-		this.purpose = SyntheticMethodBinding.FieldReadAccess;
+		this.purpose = SyntheticMethodBinding.RecordComponentReadAccess;
 		this.thrownExceptions = Binding.NO_EXCEPTIONS;
 		this.index = nextSmbIndex();
 		this.sourceStart = rcb.sourceRecordComponent().sourceStart;