Polishing

Issue: SPR-14863

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpEQ.java

@@ -36,9 +36,9 @@ public class OpEQ extends Operator {
 		this.exitTypeDescriptor = "Z";
 	}
 
+
 	@Override
-	public BooleanTypedValue getValueInternal(ExpressionState state)
-			throws EvaluationException {
+	public BooleanTypedValue getValueInternal(ExpressionState state) throws EvaluationException {
 		Object left = getLeftOperand().getValueInternal(state).getValue();
 		Object right = getRightOperand().getValueInternal(state).getValue();
 		this.leftActualDescriptor = CodeFlow.toDescriptorFromObject(left);
@@ -86,11 +86,9 @@ public class OpEQ extends Operator {
 		}
 
 		String operatorClassName = Operator.class.getName().replace('.', '/');
-		String evaluationContextClassName = EvaluationContext.class.getName().replace('.',
-				'/');
-		mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck", "(L"
-				+ evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z",
-				false);
+		String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
+		mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
+				"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
 		cf.pushDescriptor("Z");
 	}
 

spring-expression/src/main/java/org/springframework/expression/spel/ast/OpNE.java

@@ -37,9 +37,9 @@ public class OpNE extends Operator {
 		this.exitTypeDescriptor = "Z";
 	}
 
+
 	@Override
-	public BooleanTypedValue getValueInternal(ExpressionState state)
-			throws EvaluationException {
+	public BooleanTypedValue getValueInternal(ExpressionState state) throws EvaluationException {
 		Object left = getLeftOperand().getValueInternal(state).getValue();
 		Object right = getRightOperand().getValueInternal(state).getValue();
 		this.leftActualDescriptor = CodeFlow.toDescriptorFromObject(left);
@@ -87,11 +87,9 @@ public class OpNE extends Operator {
 		}
 
 		String operatorClassName = Operator.class.getName().replace('.', '/');
-		String evaluationContextClassName = EvaluationContext.class.getName().replace('.',
-				'/');
-		mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck", "(L"
-				+ evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z",
-				false);
+		String evaluationContextClassName = EvaluationContext.class.getName().replace('.', '/');
+		mv.visitMethodInsn(INVOKESTATIC, operatorClassName, "equalityCheck",
+				"(L" + evaluationContextClassName + ";Ljava/lang/Object;Ljava/lang/Object;)Z", false);
 
 		// Invert the boolean
 		Label notZero = new Label();

spring-expression/src/main/java/org/springframework/expression/spel/ast/Operator.java

@@ -159,6 +159,16 @@ public abstract class Operator extends SpelNodeImpl {
 		cf.pushDescriptor("Z");
 	}
 
+
+	/**
+	 * Perform an equality check for the given operand values.
+	 * <p>This method is not just used for reflective comparisons in subclasses
+	 * but also from compiled expression code, which is why it needs to be
+	 * declared as {@code public static} here.
+	 * @param context the current evaluation context
+	 * @param left the left-hand operand value
+	 * @param right the right-hand operand value
+	 */
 	public static boolean equalityCheck(EvaluationContext context, Object left, Object right) {
 		if (left instanceof Number && right instanceof Number) {
 			Number leftNumber = (Number) left;