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Name attributes in method argument annotations allow for placeholders and expressions

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Issue: SPR-13952
This commit is contained in:
Juergen Hoeller
2016-02-17 22:59:12 +01:00
parent c2f704717e
commit e0d7c6be00
4 changed files with 115 additions and 70 deletions
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43
spring-messaging/src/main/java/org/springframework/messaging/handler/annotation/support/AbstractNamedValueMethodArgumentResolver.java
View File

@@ -87,10 +87,16 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
NamedValueInfo namedValueInfo = getNamedValueInfo(parameter);
MethodParameter nestedParameter = parameter.nestedIfOptional();
Object arg = resolveArgumentInternal(nestedParameter, message, namedValueInfo.name);
Object resolvedName = resolveStringValue(namedValueInfo.name);
if (resolvedName == null) {
throw new IllegalArgumentException(
"Specified name must not resolve to null: [" + namedValueInfo.name + "]");
}
Object arg = resolveArgumentInternal(nestedParameter, message, resolvedName.toString());
if (arg == null) {
if (namedValueInfo.defaultValue != null) {
arg = resolveDefaultValue(namedValueInfo.defaultValue);
arg = resolveStringValue(namedValueInfo.defaultValue);
}
else if (namedValueInfo.required && !nestedParameter.isOptional()) {
handleMissingValue(namedValueInfo.name, nestedParameter, message);
@@ -98,7 +104,7 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
arg = handleNullValue(namedValueInfo.name, arg, nestedParameter.getNestedParameterType());
}
else if ("".equals(arg) && namedValueInfo.defaultValue != null) {
arg = resolveDefaultValue(namedValueInfo.defaultValue);
arg = resolveStringValue(namedValueInfo.defaultValue);
}
if (!ClassUtils.isAssignableValue(parameter.getParameterType(), arg)) {
@@ -148,6 +154,22 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
return new NamedValueInfo(name, info.required, defaultValue);
}
/**
* Resolve the given annotation-specified value,
* potentially containing placeholders and expressions.
*/
private Object resolveStringValue(String value) {
if (this.configurableBeanFactory == null) {
return value;
}
String placeholdersResolved = this.configurableBeanFactory.resolveEmbeddedValue(value);
BeanExpressionResolver exprResolver = this.configurableBeanFactory.getBeanExpressionResolver();
if (exprResolver == null) {
return value;
}
return exprResolver.evaluate(placeholdersResolved, this.expressionContext);
}
/**
* Resolves the given parameter type and value name into an argument value.
* @param parameter the method parameter to resolve to an argument value
@@ -159,21 +181,6 @@ public abstract class AbstractNamedValueMethodArgumentResolver implements Handle
protected abstract Object resolveArgumentInternal(MethodParameter parameter, Message<?> message, String name)
throws Exception;
/**
* Resolves the given default value into an argument value.
*/
private Object resolveDefaultValue(String defaultValue) {
if (this.configurableBeanFactory == null) {
return defaultValue;
}
String placeholdersResolved = this.configurableBeanFactory.resolveEmbeddedValue(defaultValue);
BeanExpressionResolver exprResolver = this.configurableBeanFactory.getBeanExpressionResolver();
if (exprResolver == null) {
return defaultValue;
}
return exprResolver.evaluate(placeholdersResolved, this.expressionContext);
}
/**
* Invoked when a named value is required, but
* {@link #resolveArgumentInternal(MethodParameter, Message, String)} returned {@code null} and

44
spring-messaging/src/test/java/org/springframework/messaging/handler/annotation/support/HeaderMethodArgumentResolverTests.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2015 the original author or authors.
* Copyright 2002-2016 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.
@@ -34,6 +34,7 @@ import org.springframework.messaging.MessageHandlingException;
import org.springframework.messaging.handler.annotation.Header;
import org.springframework.messaging.support.MessageBuilder;
import org.springframework.messaging.support.NativeMessageHeaderAccessor;
import org.springframework.util.ReflectionUtils;
import static org.junit.Assert.*;
@@ -49,7 +50,8 @@ public class HeaderMethodArgumentResolverTests {
private MethodParameter paramRequired;
private MethodParameter paramNamedDefaultValueStringHeader;
private MethodParameter paramSystemProperty;
private MethodParameter paramSystemPropertyDefaultValue;
private MethodParameter paramSystemPropertyName;
private MethodParameter paramNotAnnotated;
private MethodParameter paramNativeHeader;
@@ -61,13 +63,13 @@ public class HeaderMethodArgumentResolverTests {
cxt.refresh();
this.resolver = new HeaderMethodArgumentResolver(new DefaultConversionService(), cxt.getBeanFactory());
Method method = getClass().getDeclaredMethod("handleMessage",
String.class, String.class, String.class, String.class, String.class);
Method method = ReflectionUtils.findMethod(getClass(), "handleMessage", (Class<?>[]) null);
this.paramRequired = new SynthesizingMethodParameter(method, 0);
this.paramNamedDefaultValueStringHeader = new SynthesizingMethodParameter(method, 1);
this.paramSystemProperty = new SynthesizingMethodParameter(method, 2);
this.paramNotAnnotated = new SynthesizingMethodParameter(method, 3);
this.paramNativeHeader = new SynthesizingMethodParameter(method, 4);
this.paramSystemPropertyDefaultValue = new SynthesizingMethodParameter(method, 2);
this.paramSystemPropertyName = new SynthesizingMethodParameter(method, 3);
this.paramNotAnnotated = new SynthesizingMethodParameter(method, 4);
this.paramNativeHeader = new SynthesizingMethodParameter(method, 5);
this.paramRequired.initParameterNameDiscovery(new DefaultParameterNameDiscoverer());
GenericTypeResolver.resolveParameterType(this.paramRequired, HeaderMethodArgumentResolver.class);
@@ -84,18 +86,14 @@ public class HeaderMethodArgumentResolverTests {
public void resolveArgument() throws Exception {
Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).setHeader("param1", "foo").build();
Object result = this.resolver.resolveArgument(this.paramRequired, message);
assertEquals("foo", result);
}
// SPR-11326
@Test
@Test // SPR-11326
public void resolveArgumentNativeHeader() throws Exception {
TestMessageHeaderAccessor headers = new TestMessageHeaderAccessor();
headers.setNativeHeader("param1", "foo");
Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).setHeaders(headers).build();
assertEquals("foo", this.resolver.resolveArgument(this.paramRequired, message));
}
@@ -120,7 +118,6 @@ public class HeaderMethodArgumentResolverTests {
public void resolveArgumentDefaultValue() throws Exception {
Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).build();
Object result = this.resolver.resolveArgument(this.paramNamedDefaultValueStringHeader, message);
assertEquals("bar", result);
}
@@ -129,7 +126,7 @@ public class HeaderMethodArgumentResolverTests {
System.setProperty("systemProperty", "sysbar");
try {
Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).build();
Object result = resolver.resolveArgument(paramSystemProperty, message);
Object result = resolver.resolveArgument(paramSystemPropertyDefaultValue, message);
assertEquals("sysbar", result);
}
finally {
@@ -137,13 +134,26 @@ public class HeaderMethodArgumentResolverTests {
}
}
@Test
public void resolveNameFromSystemProperty() throws Exception {
System.setProperty("systemProperty", "sysbar");
try {
Message<byte[]> message = MessageBuilder.withPayload(new byte[0]).setHeader("sysbar", "foo").build();
Object result = resolver.resolveArgument(paramSystemPropertyName, message);
assertEquals("foo", result);
}
finally {
System.clearProperty("systemProperty");
}
}
@SuppressWarnings("unused")
private void handleMessage(
public void handleMessage(
@Header String param1,
@Header(name = "name", defaultValue = "bar") String param2,
@Header(name = "name", defaultValue = "#{systemProperties.systemProperty}") String param3,
String param4,
@Header(name = "#{systemProperties.systemProperty}") String param4,
String param5,
@Header("nativeHeaders.param1") String nativeHeaderParam1) {
}