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Consistent Map/Set ordering

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Use LinkedHashMaps/Sets wherever exposed to users, and code tests defensively in terms of expected Map/Set ordering. Otherwise, there'll be runtime order differences between JDK 7 and JDK 8 due to internal HashMap/Set implementation differences.

Issue: SPR-9639
This commit is contained in:
Juergen Hoeller
2013-04-23 13:53:09 +02:00
parent b5d44e1d15
commit 9c09a0a037
18 changed files with 145 additions and 195 deletions
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6
spring-webmvc/src/main/java/org/springframework/web/servlet/handler/AbstractHandlerExceptionResolver.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2013 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.
@@ -51,7 +51,7 @@ public abstract class AbstractHandlerExceptionResolver implements HandlerExcepti
private int order = Ordered.LOWEST_PRECEDENCE;
private Set mappedHandlers;
private Set<?> mappedHandlers;
private Class[] mappedHandlerClasses;
@@ -76,7 +76,7 @@ public abstract class AbstractHandlerExceptionResolver implements HandlerExcepti
* as fallback for all exceptions; any further HandlerExceptionResolvers in the chain will be
* ignored in this case.
*/
public void setMappedHandlers(Set mappedHandlers) {
public void setMappedHandlers(Set<?> mappedHandlers) {
this.mappedHandlers = mappedHandlers;
}

68
spring-webmvc/src/main/java/org/springframework/web/servlet/handler/SimpleMappingExceptionResolver.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2013 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.
@@ -28,11 +28,12 @@ import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.util.WebUtils;
/**
* {@link org.springframework.web.servlet.HandlerExceptionResolver} implementation that allows for mapping exception
* class names to view names, either for a set of given handlers or for all handlers in the DispatcherServlet.
* {@link org.springframework.web.servlet.HandlerExceptionResolver} implementation
* that allows for mapping exception class names to view names, either for a set of
* given handlers or for all handlers in the DispatcherServlet.
*
* <p>Error views are analogous to error page JSPs, but can be used with any kind of exception including any checked
* one, with fine-granular mappings for specific handlers.
* <p>Error views are analogous to error page JSPs, but can be used with any kind of
* exception including any checked one, with fine-granular mappings for specific handlers.
*
* @author Juergen Hoeller
* @author Arjen Poutsma
@@ -87,18 +88,20 @@ public class SimpleMappingExceptionResolver extends AbstractHandlerExceptionReso
}
/**
* Set the name of the default error view. This view will be returned if no specific mapping was found. <p>Default is
* none.
* Set the name of the default error view.
* This view will be returned if no specific mapping was found.
* <p>Default is none.
*/
public void setDefaultErrorView(String defaultErrorView) {
this.defaultErrorView = defaultErrorView;
}
/**
* Set the HTTP status code that this exception resolver will apply for a given resolved error view. Keys are
* view names; values are status codes.
* <p>Note that this error code will only get applied in case of a top-level request. It will not be set for an include
* request, since the HTTP status cannot be modified from within an include.
* Set the HTTP status code that this exception resolver will apply for a given
* resolved error view. Keys are view names; values are status codes.
* <p>Note that this error code will only get applied in case of a top-level request.
* It will not be set for an include request, since the HTTP status cannot be modified
* from within an include.
* <p>If not specified, the default status code will be applied.
* @see #setDefaultStatusCode(int)
*/
@@ -127,12 +130,13 @@ public class SimpleMappingExceptionResolver extends AbstractHandlerExceptionReso
}
/**
* Set the default HTTP status code that this exception resolver will apply if it resolves an error view and if there
* is no status code mapping defined.
* <p>Note that this error code will only get applied in case of a top-level request. It will not be set for an
* include request, since the HTTP status cannot be modified from within an include.
* <p>If not specified, no status code will be applied, either leaving this to the controller or view, or keeping
* the servlet engine's default of 200 (OK).
* Set the default HTTP status code that this exception resolver will apply
* if it resolves an error view and if there is no status code mapping defined.
* <p>Note that this error code will only get applied in case of a top-level request.
* It will not be set for an include request, since the HTTP status cannot be modified
* from within an include.
* <p>If not specified, no status code will be applied, either leaving this to the
* controller or view, or keeping the servlet engine's default of 200 (OK).
* @param defaultStatusCode HTTP status code value, for example 500
* ({@link HttpServletResponse#SC_INTERNAL_SERVER_ERROR}) or 404 ({@link HttpServletResponse#SC_NOT_FOUND})
* @see #setStatusCodes(Properties)
@@ -142,31 +146,34 @@ public class SimpleMappingExceptionResolver extends AbstractHandlerExceptionReso
}
/**
* Set the name of the model attribute as which the exception should be exposed. Default is "exception". <p>This can be
* either set to a different attribute name or to {@code null} for not exposing an exception attribute at all.
* Set the name of the model attribute as which the exception should be exposed.
* Default is "exception".
* <p>This can be either set to a different attribute name or to {@code null}
* for not exposing an exception attribute at all.
* @see #DEFAULT_EXCEPTION_ATTRIBUTE
*/
public void setExceptionAttribute(String exceptionAttribute) {
this.exceptionAttribute = exceptionAttribute;
}
/**
* Actually resolve the given exception that got thrown during on handler execution, returning a ModelAndView that
* represents a specific error page if appropriate. <p>May be overridden in subclasses, in order to apply specific
* exception checks. Note that this template method will be invoked <i>after</i> checking whether this resolved applies
* ("mappedHandlers" etc), so an implementation may simply proceed with its actual exception handling.
* Actually resolve the given exception that got thrown during on handler execution,
* returning a ModelAndView that represents a specific error page if appropriate.
* <p>May be overridden in subclasses, in order to apply specific exception checks.
* Note that this template method will be invoked <i>after</i> checking whether this
* resolved applies ("mappedHandlers" etc), so an implementation may simply proceed
* with its actual exception handling.
* @param request current HTTP request
* @param response current HTTP response
* @param handler the executed handler, or {@code null} if none chosen at the time of the exception (for example,
* if multipart resolution failed)
* @param handler the executed handler, or {@code null} if none chosen at the time
* of the exception (for example, if multipart resolution failed)
* @param ex the exception that got thrown during handler execution
* @return a corresponding ModelAndView to forward to, or {@code null} for default processing
*/
@Override
protected ModelAndView doResolveException(HttpServletRequest request,
HttpServletResponse response,
Object handler,
Exception ex) {
protected ModelAndView doResolveException(HttpServletRequest request, HttpServletResponse response,
Object handler, Exception ex) {
// Expose ModelAndView for chosen error view.
String viewName = determineViewName(ex, request);
@@ -231,7 +238,8 @@ public class SimpleMappingExceptionResolver extends AbstractHandlerExceptionReso
for (Enumeration<?> names = exceptionMappings.propertyNames(); names.hasMoreElements();) {
String exceptionMapping = (String) names.nextElement();
int depth = getDepth(exceptionMapping, ex);
if (depth >= 0 && depth < deepest) {
if (depth >= 0 && (depth < deepest || (depth == deepest &&
dominantMapping != null && exceptionMapping.length() > dominantMapping.length()))) {
deepest = depth;
dominantMapping = exceptionMapping;
viewName = exceptionMappings.getProperty(exceptionMapping);

22
spring-webmvc/src/main/java/org/springframework/web/servlet/mvc/method/RequestMappingInfoHandlerMapping.java
View File

@@ -20,10 +20,10 @@ import java.util.ArrayList;
import java.util.Comparator;
import java.util.HashSet;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
@@ -86,7 +86,6 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
/**
* Expose URI template variables, matrix variables, and producible media types in the request.
*
* @see HandlerMapping#URI_TEMPLATE_VARIABLES_ATTRIBUTE
* @see HandlerMapping#MATRIX_VARIABLES_ATTRIBUTE
* @see HandlerMapping#PRODUCIBLE_MEDIA_TYPES_ATTRIBUTE
@@ -149,19 +148,16 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
/**
* Iterate all RequestMappingInfos once again, look if any match by URL at
* least and raise exceptions accordingly.
*
* @throws HttpRequestMethodNotSupportedException
* if there are matches by URL but not by HTTP method
* @throws HttpMediaTypeNotAcceptableException
* if there are matches by URL but not by consumable media types
* @throws HttpMediaTypeNotAcceptableException
* if there are matches by URL but not by producible media types
* @throws HttpRequestMethodNotSupportedException if there are matches by URL
* but not by HTTP method
* @throws HttpMediaTypeNotAcceptableException if there are matches by URL
* but not by consumable/producible media types
*/
@Override
protected HandlerMethod handleNoMatch(Set<RequestMappingInfo> requestMappingInfos,
String lookupPath, HttpServletRequest request) throws ServletException {
Set<String> allowedMethods = new HashSet<String>(6);
Set<String> allowedMethods = new LinkedHashSet<String>(4);
Set<RequestMappingInfo> patternMatches = new HashSet<RequestMappingInfo>();
Set<RequestMappingInfo> patternAndMethodMatches = new HashSet<RequestMappingInfo>();
@@ -193,12 +189,12 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
if (patternAndMethodMatches.isEmpty()) {
consumableMediaTypes = getConsumableMediaTypes(request, patternMatches);
producibleMediaTypes = getProdicubleMediaTypes(request, patternMatches);
producibleMediaTypes = getProducibleMediaTypes(request, patternMatches);
paramConditions = getRequestParams(request, patternMatches);
}
else {
consumableMediaTypes = getConsumableMediaTypes(request, patternAndMethodMatches);
producibleMediaTypes = getProdicubleMediaTypes(request, patternAndMethodMatches);
producibleMediaTypes = getProducibleMediaTypes(request, patternAndMethodMatches);
paramConditions = getRequestParams(request, patternAndMethodMatches);
}
@@ -236,7 +232,7 @@ public abstract class RequestMappingInfoHandlerMapping extends AbstractHandlerMe
return result;
}
private Set<MediaType> getProdicubleMediaTypes(HttpServletRequest request, Set<RequestMappingInfo> partialMatches) {
private Set<MediaType> getProducibleMediaTypes(HttpServletRequest request, Set<RequestMappingInfo> partialMatches) {
Set<MediaType> result = new HashSet<MediaType>();
for (RequestMappingInfo partialMatch : partialMatches) {
if (partialMatch.getProducesCondition().getMatchingCondition(request) == null) {

10
spring-webmvc/src/main/java/org/springframework/web/servlet/view/AbstractView.java
View File

@@ -1,5 +1,5 @@
/*
* Copyright 2002-2012 the original author or authors.
* Copyright 2002-2013 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.
@@ -19,11 +19,10 @@ package org.springframework.web.servlet.view;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@@ -70,7 +69,7 @@ public abstract class AbstractView extends WebApplicationObjectSupport implement
private String requestContextAttribute;
/** Map of static attributes, keyed by attribute name (String) */
private final Map<String, Object> staticAttributes = new HashMap<String, Object>();
private final Map<String, Object> staticAttributes = new LinkedHashMap<String, Object>();
/** Whether or not the view should add path variables in the model */
private boolean exposePathVariables = true;
@@ -269,6 +268,7 @@ public abstract class AbstractView extends WebApplicationObjectSupport implement
* Dynamic values take precedence over static attributes.
*/
protected Map<String, Object> createMergedOutputModel(Map<String, ?> model, HttpServletRequest request,
HttpServletResponse response) {
@SuppressWarnings("unchecked")
Map<String, Object> pathVars = this.exposePathVariables ?
@@ -278,7 +278,7 @@ public abstract class AbstractView extends WebApplicationObjectSupport implement
int size = this.staticAttributes.size();
size += (model != null) ? model.size() : 0;
size += (pathVars != null) ? pathVars.size() : 0;
Map<String, Object> mergedModel = new HashMap<String, Object>(size);
Map<String, Object> mergedModel = new LinkedHashMap<String, Object>(size);
mergedModel.putAll(this.staticAttributes);
if (pathVars != null) {
mergedModel.putAll(pathVars);