Restructure SpEL indexer compilation tests

spring-expression/src/test/java/org/springframework/expression/spel/CompilableMapAccessor.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2002-2024 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.expression.spel;
+
+import java.util.Map;
+
+import org.springframework.asm.MethodVisitor;
+import org.springframework.expression.AccessException;
+import org.springframework.expression.EvaluationContext;
+import org.springframework.expression.TypedValue;
+import org.springframework.lang.Nullable;
+import org.springframework.util.Assert;
+
+/**
+ * This is a local COPY of {@link org.springframework.context.expression.MapAccessor}.
+ *
+ * @author Juergen Hoeller
+ * @author Andy Clement
+ * @since 4.1
+ */
+class CompilableMapAccessor implements CompilablePropertyAccessor {
+
+	@Override
+	public Class<?>[] getSpecificTargetClasses() {
+		return new Class<?>[] {Map.class};
+	}
+
+	@Override
+	public boolean canRead(EvaluationContext context, @Nullable Object target, String name) throws AccessException {
+		return (target instanceof Map<?, ?> map && map.containsKey(name));
+	}
+
+	@Override
+	public TypedValue read(EvaluationContext context, @Nullable Object target, String name) throws AccessException {
+		Assert.state(target instanceof Map, "Target must be of type Map");
+		Map<?, ?> map = (Map<?, ?>) target;
+		Object value = map.get(name);
+		if (value == null && !map.containsKey(name)) {
+			throw new MapAccessException(name);
+		}
+		return new TypedValue(value);
+	}
+
+	@Override
+	public boolean canWrite(EvaluationContext context, @Nullable Object target, String name) throws AccessException {
+		return true;
+	}
+
+	@Override
+	@SuppressWarnings("unchecked")
+	public void write(EvaluationContext context, @Nullable Object target, String name, @Nullable Object newValue)
+			throws AccessException {
+
+		Assert.state(target instanceof Map, "Target must be a Map");
+		Map<Object, Object> map = (Map<Object, Object>) target;
+		map.put(name, newValue);
+	}
+
+	@Override
+	public boolean isCompilable() {
+		return true;
+	}
+
+	@Override
+	public Class<?> getPropertyType() {
+		return Object.class;
+	}
+
+	@Override
+	public void generateCode(String propertyName, MethodVisitor mv, CodeFlow cf) {
+		String descriptor = cf.lastDescriptor();
+		if (descriptor == null || !descriptor.equals("Ljava/util/Map")) {
+			if (descriptor == null) {
+				cf.loadTarget(mv);
+			}
+			CodeFlow.insertCheckCast(mv, "Ljava/util/Map");
+		}
+		mv.visitLdcInsn(propertyName);
+		mv.visitMethodInsn(INVOKEINTERFACE, "java/util/Map", "get","(Ljava/lang/Object;)Ljava/lang/Object;",true);
+	}
+
+
+	/**
+	 * Exception thrown from {@code read} in order to reset a cached
+	 * PropertyAccessor, allowing other accessors to have a try.
+	 */
+	@SuppressWarnings("serial")
+	private static class MapAccessException extends AccessException {
+
+		private final String key;
+
+		public MapAccessException(String key) {
+			super("");
+			this.key = key;
+		}
+
+		@Override
+		public String getMessage() {
+			return "Map does not contain a value for key '" + this.key + "'";
+		}
+	}
+
+}

spring-expression/src/test/java/org/springframework/expression/spel/standard/SpelCompilerTests.java

@@ -36,6 +36,7 @@ import static org.springframework.expression.spel.standard.SpelExpressionTestUti
  * @author Sam Brannen
  * @author Andy Clement
  * @since 5.1.14
+ * @see org.springframework.expression.spel.SpelCompilationCoverageTests
  */
 class SpelCompilerTests {