Revisit Assert to avoid single-arg assert methods (with refined messages)

Issue: SPR-15196

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/DefaultCacheInvocationContext.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -44,14 +44,15 @@ class DefaultCacheInvocationContext<A extends Annotation>
 
 	private final CacheInvocationParameter[] allParameters;
 
-	public DefaultCacheInvocationContext(JCacheOperation<A> operation,
-			Object target, Object[] args) {
+
+	public DefaultCacheInvocationContext(JCacheOperation<A> operation, Object target, Object[] args) {
 		this.operation = operation;
 		this.target = target;
 		this.args = args;
 		this.allParameters = operation.getAllParameters(args);
 	}
 
+
 	@Override
 	public JCacheOperation<A> getOperation() {
 		return this.operation;
@@ -94,17 +95,19 @@ class DefaultCacheInvocationContext<A extends Annotation>
 
 	@Override
 	public <T> T unwrap(Class<T> cls) {
-		throw new IllegalArgumentException("Could not unwrap to '" + cls.getName() + "'");
+		throw new IllegalArgumentException("Cannot unwrap to " + cls);
 	}
 
+
 	@Override
 	public String toString() {
-		final StringBuilder sb = new StringBuilder("CacheInvocationContext{");
-		sb.append("operation=").append(operation);
-		sb.append(", target=").append(target);
-		sb.append(", args=").append(Arrays.toString(args));
-		sb.append(", allParameters=").append(Arrays.toString(allParameters));
+		StringBuilder sb = new StringBuilder("CacheInvocationContext{");
+		sb.append("operation=").append(this.operation);
+		sb.append(", target=").append(this.target);
+		sb.append(", args=").append(Arrays.toString(this.args));
+		sb.append(", allParameters=").append(Arrays.toString(this.allParameters));
 		sb.append('}');
 		return sb.toString();
 	}
+
 }

spring-context-support/src/main/java/org/springframework/cache/jcache/interceptor/JCacheAspectSupport.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -66,7 +66,7 @@ public class JCacheAspectSupport extends AbstractCacheInvoker implements Initial
 
 
 	public void setCacheOperationSource(JCacheOperationSource cacheOperationSource) {
-		Assert.notNull(cacheOperationSource);
+		Assert.notNull(cacheOperationSource, "JCacheOperationSource must not be null");
 		this.cacheOperationSource = cacheOperationSource;
 	}
 
@@ -80,7 +80,7 @@ public class JCacheAspectSupport extends AbstractCacheInvoker implements Initial
 	public void afterPropertiesSet() {
 		Assert.state(getCacheOperationSource() != null, "The 'cacheOperationSource' property is required: " +
 				"If there are no cacheable methods, then don't use a cache aspect.");
-		Assert.state(getErrorHandler() != null, "The 'errorHandler' is required");
+		Assert.state(getErrorHandler() != null, "The 'errorHandler' property is required");
 
 		this.cacheResultInterceptor = new CacheResultInterceptor(getErrorHandler());
 		this.cachePutInterceptor = new CachePutInterceptor(getErrorHandler());
@@ -128,23 +128,23 @@ public class JCacheAspectSupport extends AbstractCacheInvoker implements Initial
 		BasicOperation operation = context.getOperation();
 
 		if (operation instanceof CacheResultOperation) {
-			return cacheResultInterceptor.invoke(
+			return this.cacheResultInterceptor.invoke(
 					(CacheOperationInvocationContext<CacheResultOperation>) context, adapter);
 		}
 		else if (operation instanceof CachePutOperation) {
-			return cachePutInterceptor.invoke(
+			return this.cachePutInterceptor.invoke(
 					(CacheOperationInvocationContext<CachePutOperation>) context, adapter);
 		}
 		else if (operation instanceof CacheRemoveOperation) {
-			return cacheRemoveEntryInterceptor.invoke(
+			return this.cacheRemoveEntryInterceptor.invoke(
 					(CacheOperationInvocationContext<CacheRemoveOperation>) context, adapter);
 		}
 		else if (operation instanceof CacheRemoveAllOperation) {
-			return cacheRemoveAllInterceptor.invoke(
+			return this.cacheRemoveAllInterceptor.invoke(
 					(CacheOperationInvocationContext<CacheRemoveAllOperation>) context, adapter);
 		}
 		else {
-			throw new IllegalArgumentException("Could not handle " + operation);
+			throw new IllegalArgumentException("Cannot handle " + operation);
 		}
 	}
 

spring-context-support/src/main/java/org/springframework/scheduling/quartz/SchedulerFactoryBean.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2017 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.
@@ -43,7 +43,6 @@ import org.springframework.core.io.Resource;
 import org.springframework.core.io.ResourceLoader;
 import org.springframework.core.io.support.PropertiesLoaderUtils;
 import org.springframework.scheduling.SchedulingException;
-import org.springframework.util.Assert;
 import org.springframework.util.CollectionUtils;
 
 /**
@@ -105,6 +104,7 @@ public class SchedulerFactoryBean extends SchedulerAccessor implements FactoryBe
 	private static final ThreadLocal<DataSource> configTimeNonTransactionalDataSourceHolder =
 			new ThreadLocal<>();
 
+
 	/**
 	 * Return the ResourceLoader for the currently configured Quartz Scheduler,
 	 * to be used by ResourceLoaderClassLoadHelper.
@@ -210,7 +210,6 @@ public class SchedulerFactoryBean extends SchedulerAccessor implements FactoryBe
 	 * @see #setQuartzProperties
 	 */
 	public void setSchedulerFactoryClass(Class<? extends SchedulerFactory> schedulerFactoryClass) {
-		Assert.isAssignable(SchedulerFactory.class, schedulerFactoryClass);
 		this.schedulerFactoryClass = schedulerFactoryClass;
 	}