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/*
* Copyright 2002-2022 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.test.context;
import java.io.Serializable;
import java.util.Arrays;
import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.Set;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextInitializer;
import org.springframework.core.style.ToStringCreator;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
/**
* {@code MergedContextConfiguration} encapsulates the merged context
* configuration declared on a test class and all of its superclasses and
* enclosing classes via {@link ContextConfiguration @ContextConfiguration},
* {@link ActiveProfiles @ActiveProfiles}, and
* {@link TestPropertySource @TestPropertySource}.
*
* Merged context resource locations, annotated classes, active profiles,
* property resource locations, and in-lined properties represent all declared
* values in the test class hierarchy and enclosing class hierarchy taking into
* consideration the semantics of the {@link ContextConfiguration#inheritLocations},
* {@link ActiveProfiles#inheritProfiles},
* {@link TestPropertySource#inheritLocations}, and
* {@link TestPropertySource#inheritProperties} flags.
*
*
A {@link SmartContextLoader} uses {@code MergedContextConfiguration}
* to load an {@link org.springframework.context.ApplicationContext ApplicationContext}.
*
*
{@code MergedContextConfiguration} is also used by the
* {@link org.springframework.test.context.cache.ContextCache ContextCache}
* as the key for caching an
* {@link org.springframework.context.ApplicationContext ApplicationContext}
* that was loaded using properties of this {@code MergedContextConfiguration}.
*
* @author Sam Brannen
* @author Phillip Webb
* @since 3.1
* @see ContextConfiguration
* @see ContextHierarchy
* @see ActiveProfiles
* @see TestPropertySource
* @see ContextConfigurationAttributes
* @see SmartContextLoader#loadContext(MergedContextConfiguration)
*/
public class MergedContextConfiguration implements Serializable {
private static final long serialVersionUID = -3290560718464957422L;
private static final String[] EMPTY_STRING_ARRAY = new String[0];
private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
private static final Set>> EMPTY_INITIALIZER_CLASSES =
Collections.>> emptySet();
private static final Set EMPTY_CONTEXT_CUSTOMIZERS = Collections. emptySet();
private final Class testClass;
private final String[] locations;
private final Class[] classes;
private final Set>> contextInitializerClasses;
private final String[] activeProfiles;
private final String[] propertySourceLocations;
private final String[] propertySourceProperties;
private final Set contextCustomizers;
private final ContextLoader contextLoader;
@Nullable
private final CacheAwareContextLoaderDelegate cacheAwareContextLoaderDelegate;
@Nullable
private final MergedContextConfiguration parent;
/**
* Create a new {@code MergedContextConfiguration} instance for the
* supplied parameters.
* @param testClass the test class for which the configuration was merged
* @param locations the merged context resource locations
* @param classes the merged annotated classes
* @param activeProfiles the merged active bean definition profiles
* @param contextLoader the resolved {@code ContextLoader}
*/
public MergedContextConfiguration(Class testClass, @Nullable String[] locations, @Nullable Class[] classes,
@Nullable String[] activeProfiles, @Nullable ContextLoader contextLoader) {
this(testClass, locations, classes, null, activeProfiles, contextLoader);
}
/**
* Create a new {@code MergedContextConfiguration} instance for the
* supplied parameters.
* @param testClass the test class for which the configuration was merged
* @param locations the merged context resource locations
* @param classes the merged annotated classes
* @param contextInitializerClasses the merged context initializer classes
* @param activeProfiles the merged active bean definition profiles
* @param contextLoader the resolved {@code ContextLoader}
*/
public MergedContextConfiguration(Class testClass, @Nullable String[] locations, @Nullable Class[] classes,
@Nullable Set>> contextInitializerClasses,
@Nullable String[] activeProfiles, @Nullable ContextLoader contextLoader) {
this(testClass, locations, classes, contextInitializerClasses, activeProfiles, contextLoader, null, null);
}
/**
* Create a new {@code MergedContextConfiguration} instance for the
* supplied parameters.
* @param testClass the test class for which the configuration was merged
* @param locations the merged context resource locations
* @param classes the merged annotated classes
* @param contextInitializerClasses the merged context initializer classes
* @param activeProfiles the merged active bean definition profiles
* @param contextLoader the resolved {@code ContextLoader}
* @param cacheAwareContextLoaderDelegate a cache-aware context loader
* delegate with which to retrieve the parent context
* @param parent the parent configuration or {@code null} if there is no parent
* @since 3.2.2
*/
public MergedContextConfiguration(Class testClass, @Nullable String[] locations, @Nullable Class[] classes,
@Nullable Set>> contextInitializerClasses,
@Nullable String[] activeProfiles, @Nullable ContextLoader contextLoader,
@Nullable CacheAwareContextLoaderDelegate cacheAwareContextLoaderDelegate,
@Nullable MergedContextConfiguration parent) {
this(testClass, locations, classes, contextInitializerClasses, activeProfiles, null, null,
contextLoader, cacheAwareContextLoaderDelegate, parent);
}
/**
* Create a new {@code MergedContextConfiguration} instance by copying
* all fields from the supplied {@code MergedContextConfiguration}.
* @since 4.1
*/
public MergedContextConfiguration(MergedContextConfiguration mergedConfig) {
this(mergedConfig.testClass, mergedConfig.locations, mergedConfig.classes,
mergedConfig.contextInitializerClasses, mergedConfig.activeProfiles, mergedConfig.propertySourceLocations,
mergedConfig.propertySourceProperties, mergedConfig.contextCustomizers,
mergedConfig.contextLoader, mergedConfig.cacheAwareContextLoaderDelegate, mergedConfig.parent);
}
/**
* Create a new {@code MergedContextConfiguration} instance for the
* supplied parameters.
* If a {@code null} value is supplied for {@code locations},
* {@code classes}, {@code activeProfiles}, {@code propertySourceLocations},
* or {@code propertySourceProperties} an empty array will be stored instead.
* If a {@code null} value is supplied for the
* {@code contextInitializerClasses} an empty set will be stored instead.
* Furthermore, active profiles will be sorted, and duplicate profiles
* will be removed.
* @param testClass the test class for which the configuration was merged
* @param locations the merged context resource locations
* @param classes the merged annotated classes
* @param contextInitializerClasses the merged context initializer classes
* @param activeProfiles the merged active bean definition profiles
* @param propertySourceLocations the merged {@code PropertySource} locations
* @param propertySourceProperties the merged {@code PropertySource} properties
* @param contextLoader the resolved {@code ContextLoader}
* @param cacheAwareContextLoaderDelegate a cache-aware context loader
* delegate with which to retrieve the parent context
* @param parent the parent configuration or {@code null} if there is no parent
* @since 4.1
*/
public MergedContextConfiguration(Class testClass, @Nullable String[] locations, @Nullable Class[] classes,
@Nullable Set>> contextInitializerClasses,
@Nullable String[] activeProfiles, @Nullable String[] propertySourceLocations,
@Nullable String[] propertySourceProperties, @Nullable ContextLoader contextLoader,
@Nullable CacheAwareContextLoaderDelegate cacheAwareContextLoaderDelegate,
@Nullable MergedContextConfiguration parent) {
this(testClass, locations, classes, contextInitializerClasses, activeProfiles,
propertySourceLocations, propertySourceProperties,
EMPTY_CONTEXT_CUSTOMIZERS, contextLoader,
cacheAwareContextLoaderDelegate, parent);
}
/**
* Create a new {@code MergedContextConfiguration} instance for the
* supplied parameters.
* If a {@code null} value is supplied for {@code locations},
* {@code classes}, {@code activeProfiles}, {@code propertySourceLocations},
* or {@code propertySourceProperties} an empty array will be stored instead.
* If a {@code null} value is supplied for {@code contextInitializerClasses}
* or {@code contextCustomizers}, an empty set will be stored instead.
* Furthermore, active profiles will be sorted, and duplicate profiles
* will be removed.
* @param testClass the test class for which the configuration was merged
* @param locations the merged context resource locations
* @param classes the merged annotated classes
* @param contextInitializerClasses the merged context initializer classes
* @param activeProfiles the merged active bean definition profiles
* @param propertySourceLocations the merged {@code PropertySource} locations
* @param propertySourceProperties the merged {@code PropertySource} properties
* @param contextCustomizers the context customizers
* @param contextLoader the resolved {@code ContextLoader}
* @param cacheAwareContextLoaderDelegate a cache-aware context loader
* delegate with which to retrieve the parent context
* @param parent the parent configuration or {@code null} if there is no parent
* @since 4.3
*/
public MergedContextConfiguration(Class testClass, @Nullable String[] locations, @Nullable Class[] classes,
@Nullable Set>> contextInitializerClasses,
@Nullable String[] activeProfiles, @Nullable String[] propertySourceLocations,
@Nullable String[] propertySourceProperties, @Nullable Set contextCustomizers,
@Nullable ContextLoader contextLoader, @Nullable CacheAwareContextLoaderDelegate cacheAwareContextLoaderDelegate,
@Nullable MergedContextConfiguration parent) {
this.testClass = testClass;
this.locations = processStrings(locations);
this.classes = processClasses(classes);
this.contextInitializerClasses = processContextInitializerClasses(contextInitializerClasses);
this.activeProfiles = processActiveProfiles(activeProfiles);
this.propertySourceLocations = processStrings(propertySourceLocations);
this.propertySourceProperties = processStrings(propertySourceProperties);
this.contextCustomizers = processContextCustomizers(contextCustomizers);
this.contextLoader = contextLoader;
this.cacheAwareContextLoaderDelegate = cacheAwareContextLoaderDelegate;
this.parent = parent;
}
/**
* Get the {@linkplain Class test class} associated with this
* {@code MergedContextConfiguration}.
*/
public Class getTestClass() {
return this.testClass;
}
/**
* Get the merged resource locations for {@code ApplicationContext}
* configuration files for the {@linkplain #getTestClass() test class}.
* Context resource locations typically represent XML configuration
* files or Groovy scripts.
*/
public String[] getLocations() {
return this.locations;
}
/**
* Get the merged annotated classes for the {@linkplain #getTestClass() test class}.
*/
public Class[] getClasses() {
return this.classes;
}
/**
* Determine if this {@code MergedContextConfiguration} instance has
* path-based context resource locations.
* @return {@code true} if the {@link #getLocations() locations} array is not empty
* @since 4.0.4
* @see #hasResources()
* @see #hasClasses()
*/
public boolean hasLocations() {
return !ObjectUtils.isEmpty(getLocations());
}
/**
* Determine if this {@code MergedContextConfiguration} instance has
* class-based resources.
* @return {@code true} if the {@link #getClasses() classes} array is not empty
* @since 4.0.4
* @see #hasResources()
* @see #hasLocations()
*/
public boolean hasClasses() {
return !ObjectUtils.isEmpty(getClasses());
}
/**
* Determine if this {@code MergedContextConfiguration} instance has
* either path-based context resource locations or class-based resources.
* @return {@code true} if either the {@link #getLocations() locations}
* or the {@link #getClasses() classes} array is not empty
* @since 4.0.4
* @see #hasLocations()
* @see #hasClasses()
*/
public boolean hasResources() {
return (hasLocations() || hasClasses());
}
/**
* Get the merged {@code ApplicationContextInitializer} classes for the
* {@linkplain #getTestClass() test class}.
*/
public Set>> getContextInitializerClasses() {
return this.contextInitializerClasses;
}
/**
* Get the merged active bean definition profiles for the
* {@linkplain #getTestClass() test class}.
* @see ActiveProfiles
*/
public String[] getActiveProfiles() {
return this.activeProfiles;
}
/**
* Get the merged resource locations for test {@code PropertySources}
* for the {@linkplain #getTestClass() test class}.
* @see TestPropertySource#locations
* @see java.util.Properties
*/
public String[] getPropertySourceLocations() {
return this.propertySourceLocations;
}
/**
* Get the merged test {@code PropertySource} properties for the
* {@linkplain #getTestClass() test class}.
* Properties will be loaded into the {@code Environment}'s set of
* {@code PropertySources}.
* @see TestPropertySource#properties
* @see java.util.Properties
*/
public String[] getPropertySourceProperties() {
return this.propertySourceProperties;
}
/**
* Get the merged {@link ContextCustomizer ContextCustomizers} that will be applied
* when the application context is loaded.
*/
public Set getContextCustomizers() {
return this.contextCustomizers;
}
/**
* Get the resolved {@link ContextLoader} for the {@linkplain #getTestClass() test class}.
*/
public ContextLoader getContextLoader() {
return this.contextLoader;
}
/**
* Get the {@link MergedContextConfiguration} for the parent application context
* in a context hierarchy.
* @return the parent configuration or {@code null} if there is no parent
* @since 3.2.2
* @see #getParentApplicationContext()
*/
@Nullable
public MergedContextConfiguration getParent() {
return this.parent;
}
/**
* Get the parent {@link ApplicationContext} for the context defined by this
* {@code MergedContextConfiguration} from the context cache.
* If the parent context has not yet been loaded, it will be loaded, stored
* in the cache, and then returned.
* @return the parent {@code ApplicationContext} or {@code null} if there is no parent
* @since 3.2.2
* @see #getParent()
*/
@Nullable
public ApplicationContext getParentApplicationContext() {
if (this.parent == null) {
return null;
}
Assert.state(this.cacheAwareContextLoaderDelegate != null,
"Cannot retrieve a parent application context without access to the CacheAwareContextLoaderDelegate");
return this.cacheAwareContextLoaderDelegate.loadContext(this.parent);
}
/**
* Determine if the supplied object is equal to this {@code MergedContextConfiguration}
* instance by comparing both object's {@linkplain #getLocations() locations},
* {@linkplain #getClasses() annotated classes},
* {@linkplain #getContextInitializerClasses() context initializer classes},
* {@linkplain #getActiveProfiles() active profiles},
* {@linkplain #getPropertySourceLocations() property source locations},
* {@linkplain #getPropertySourceProperties() property source properties},
* {@linkplain #getParent() parents}, and the fully qualified names of their
* {@link #getContextLoader() ContextLoaders}.
*/
@Override
public boolean equals(@Nullable Object other) {
if (this == other) {
return true;
}
if (other == null || other.getClass() != getClass()) {
return false;
}
MergedContextConfiguration otherConfig = (MergedContextConfiguration) other;
if (!Arrays.equals(this.locations, otherConfig.locations)) {
return false;
}
if (!Arrays.equals(this.classes, otherConfig.classes)) {
return false;
}
if (!this.contextInitializerClasses.equals(otherConfig.contextInitializerClasses)) {
return false;
}
if (!Arrays.equals(this.activeProfiles, otherConfig.activeProfiles)) {
return false;
}
if (!Arrays.equals(this.propertySourceLocations, otherConfig.propertySourceLocations)) {
return false;
}
if (!Arrays.equals(this.propertySourceProperties, otherConfig.propertySourceProperties)) {
return false;
}
if (!this.contextCustomizers.equals(otherConfig.contextCustomizers)) {
return false;
}
if (this.parent == null) {
if (otherConfig.parent != null) {
return false;
}
}
else if (!this.parent.equals(otherConfig.parent)) {
return false;
}
if (!nullSafeClassName(this.contextLoader).equals(nullSafeClassName(otherConfig.contextLoader))) {
return false;
}
return true;
}
/**
* Generate a unique hash code for all properties of this
* {@code MergedContextConfiguration} excluding the
* {@linkplain #getTestClass() test class}.
*/
@Override
public int hashCode() {
int result = Arrays.hashCode(this.locations);
result = 31 * result + Arrays.hashCode(this.classes);
result = 31 * result + this.contextInitializerClasses.hashCode();
result = 31 * result + Arrays.hashCode(this.activeProfiles);
result = 31 * result + Arrays.hashCode(this.propertySourceLocations);
result = 31 * result + Arrays.hashCode(this.propertySourceProperties);
result = 31 * result + this.contextCustomizers.hashCode();
result = 31 * result + (this.parent != null ? this.parent.hashCode() : 0);
result = 31 * result + nullSafeClassName(this.contextLoader).hashCode();
return result;
}
/**
* Provide a String representation of the {@linkplain #getTestClass() test class},
* {@linkplain #getLocations() locations}, {@linkplain #getClasses() annotated classes},
* {@linkplain #getContextInitializerClasses() context initializer classes},
* {@linkplain #getActiveProfiles() active profiles},
* {@linkplain #getPropertySourceLocations() property source locations},
* {@linkplain #getPropertySourceProperties() property source properties},
* {@linkplain #getContextCustomizers() context customizers},
* the name of the {@link #getContextLoader() ContextLoader}, and the
* {@linkplain #getParent() parent configuration}.
*/
@Override
public String toString() {
return new ToStringCreator(this)
.append("testClass", this.testClass)
.append("locations", ObjectUtils.nullSafeToString(this.locations))
.append("classes", ObjectUtils.nullSafeToString(this.classes))
.append("contextInitializerClasses", ObjectUtils.nullSafeToString(this.contextInitializerClasses))
.append("activeProfiles", ObjectUtils.nullSafeToString(this.activeProfiles))
.append("propertySourceLocations", ObjectUtils.nullSafeToString(this.propertySourceLocations))
.append("propertySourceProperties", ObjectUtils.nullSafeToString(this.propertySourceProperties))
.append("contextCustomizers", this.contextCustomizers)
.append("contextLoader", nullSafeClassName(this.contextLoader))
.append("parent", this.parent)
.toString();
}
private static String[] processStrings(@Nullable String[] array) {
return (array != null ? array : EMPTY_STRING_ARRAY);
}
private static Class[] processClasses(@Nullable Class[] classes) {
return (classes != null ? classes : EMPTY_CLASS_ARRAY);
}
private static Set>> processContextInitializerClasses(
@Nullable Set>> contextInitializerClasses) {
return (contextInitializerClasses != null ?
Collections.unmodifiableSet(contextInitializerClasses) : EMPTY_INITIALIZER_CLASSES);
}
private static Set processContextCustomizers(
@Nullable Set contextCustomizers) {
return (contextCustomizers != null ?
Collections.unmodifiableSet(contextCustomizers) : EMPTY_CONTEXT_CUSTOMIZERS);
}
private static String[] processActiveProfiles(@Nullable String[] activeProfiles) {
if (activeProfiles == null) {
return EMPTY_STRING_ARRAY;
}
// Active profiles must be unique
Set profilesSet = new LinkedHashSet<>(Arrays.asList(activeProfiles));
return StringUtils.toStringArray(profilesSet);
}
/**
* Generate a null-safe {@link String} representation of the supplied
* {@link ContextLoader} based solely on the fully qualified name of the
* loader or "null" if the supplied loader is {@code null}.
*/
protected static String nullSafeClassName(@Nullable ContextLoader contextLoader) {
return (contextLoader != null ? contextLoader.getClass().getName() : "null");
}
}