Add equals/hashcode to ResponseEntity

Issue: SPR-9714

spring-web/src/main/java/org/springframework/http/HttpEntity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -17,6 +17,7 @@
 package org.springframework.http;
 
 import org.springframework.util.MultiValueMap;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Represents an HTTP request or response entity, consisting of headers and body.
@@ -122,6 +123,24 @@ public class HttpEntity<T> {
 		return (this.body != null);
 	}
 
+	@Override
+	public boolean equals(Object other) {
+		if (this == other) {
+			return true;
+		}
+		if (!(other instanceof HttpEntity)) {
+			return false;
+		}
+		HttpEntity<?> otherEntity = (HttpEntity<?>) other;
+		return (ObjectUtils.nullSafeEquals(this.headers, otherEntity.headers) &&
+				ObjectUtils.nullSafeEquals(this.body, otherEntity.body));
+	}
+
+	@Override
+	public int hashCode() {
+		return ObjectUtils.nullSafeHashCode(this.headers) * 29 + ObjectUtils.nullSafeHashCode(this.body);
+	}
+
 	@Override
 	public String toString() {
 		StringBuilder builder = new StringBuilder("<");
@@ -137,4 +156,5 @@ public class HttpEntity<T> {
 		builder.append('>');
 		return builder.toString();
 	}
+
 }

spring-web/src/main/java/org/springframework/http/ResponseEntity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2011 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -17,6 +17,7 @@
 package org.springframework.http;
 
 import org.springframework.util.MultiValueMap;
+import org.springframework.util.ObjectUtils;
 
 /**
  * Extension of {@link HttpEntity} that adds a {@link HttpStatus} status code.
@@ -94,6 +95,23 @@ public class ResponseEntity<T> extends HttpEntity<T> {
 		return statusCode;
 	}
 
+	@Override
+	public boolean equals(Object other) {
+		if (this == other) {
+			return true;
+		}
+		if (!(other instanceof ResponseEntity)) {
+			return false;
+		}
+		ResponseEntity<?> otherEntity = (ResponseEntity<?>) other;
+		return (ObjectUtils.nullSafeEquals(this.statusCode, otherEntity.statusCode) && super.equals(other));
+	}
+
+	@Override
+	public int hashCode() {
+		return super.hashCode() * 29 + ObjectUtils.nullSafeHashCode(this.statusCode);
+	}
+
 	@Override
 	public String toString() {
 		StringBuilder builder = new StringBuilder("<");

spring-web/src/test/java/org/springframework/http/HttpEntityTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2010 the original author or authors.
+ * Copyright 2002-2012 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.
@@ -34,7 +34,7 @@ public class HttpEntityTests {
 		assertSame(body, entity.getBody());
 		assertTrue(entity.getHeaders().isEmpty());
 	}
-	
+
 	@Test
 	public void httpHeaders() {
 		HttpHeaders headers = new HttpHeaders();
@@ -56,7 +56,30 @@ public class HttpEntityTests {
 		assertEquals(MediaType.TEXT_PLAIN, entity.getHeaders().getContentType());
 		assertEquals("text/plain", entity.getHeaders().getFirst("Content-Type"));
 	}
-	
+
+	@Test
+	public void testEquals() {
+		MultiValueMap<String, String> map1 = new LinkedMultiValueMap<String, String>();
+		map1.set("Content-Type", "text/plain");
+
+		MultiValueMap<String, String> map2 = new LinkedMultiValueMap<String, String>();
+		map2.set("Content-Type", "application/json");
+
+		assertTrue(new HttpEntity<Object>().equals(new HttpEntity<Object>()));
+		assertFalse(new HttpEntity<Object>(map1).equals(new HttpEntity<Object>()));
+		assertFalse(new HttpEntity<Object>().equals(new HttpEntity<Object>(map2)));
+
+		assertTrue(new HttpEntity<Object>(map1).equals(new HttpEntity<Object>(map1)));
+		assertFalse(new HttpEntity<Object>(map1).equals(new HttpEntity<Object>(map2)));
+
+		assertTrue(new HttpEntity<String>(null, null).equals(new HttpEntity<String>(null, null)));
+		assertFalse(new HttpEntity<String>("foo", null).equals(new HttpEntity<String>(null, null)));
+		assertFalse(new HttpEntity<String>(null, null).equals(new HttpEntity<String>("bar", null)));
+
+		assertTrue(new HttpEntity<String>("foo", map1).equals(new HttpEntity<String>("foo", map1)));
+		assertFalse(new HttpEntity<String>("foo", map1).equals(new HttpEntity<String>("bar", map1)));
+	}
+
 	@Test
 	public void responseEntity() {
 		HttpHeaders headers = new HttpHeaders();