Polish profile expression support

Issue: SPR-12458

spring-core/src/main/java/org/springframework/core/env/Environment.java

@@ -73,7 +73,7 @@ public interface Environment extends PropertyResolver {
 	/**
 	 * Return the set of profiles explicitly made active for this environment. Profiles
 	 * are used for creating logical groupings of bean definitions to be registered
-	 * conditionally, for example based on deployment environment.  Profiles can be
+	 * conditionally, for example based on deployment environment. Profiles can be
 	 * activated by setting {@linkplain AbstractEnvironment#ACTIVE_PROFILES_PROPERTY_NAME
 	 * "spring.profiles.active"} as a system property or by calling
 	 * {@link ConfigurableEnvironment#setActiveProfiles(String...)}.
@@ -98,11 +98,11 @@ public interface Environment extends PropertyResolver {
 	 * Return whether one or more of the given profiles is active or, in the case of no
 	 * explicit active profiles, whether one or more of the given profiles is included in
 	 * the set of default profiles. If a profile begins with '!' the logic is inverted,
-	 * i.e. the method will return true if the given profile is <em>not</em> active.
-	 * For example, <pre class="code">env.acceptsProfiles("p1", "!p2")</pre> will
-	 * return {@code true} if profile 'p1' is active or 'p2' is not active.
+	 * i.e. the method will return {@code true} if the given profile is <em>not</em> active.
+	 * For example, {@code env.acceptsProfiles("p1", "!p2")} will return {@code true} if
+	 * profile 'p1' is active or 'p2' is not active.
 	 * @throws IllegalArgumentException if called with zero arguments
-	 * or if any profile is {@code null}, empty or whitespace-only
+	 * or if any profile is {@code null}, empty, or whitespace only
 	 * @see #getActiveProfiles
 	 * @see #getDefaultProfiles
 	 * @see #acceptsProfiles(Profiles)
@@ -112,7 +112,8 @@ public interface Environment extends PropertyResolver {
 	boolean acceptsProfiles(String... profiles);
 
 	/**
-	 * Return whether the active profiles match the given {@link Profiles} predicate.
+	 * Return whether the {@linkplain #getActiveProfiles() active profiles}
+	 * match the given {@link Profiles} predicate.
 	 */
 	boolean acceptsProfiles(Profiles profiles);
 

spring-core/src/main/java/org/springframework/core/env/Profiles.java

@@ -19,11 +19,11 @@ package org.springframework.core.env;
 import java.util.function.Predicate;
 
 /**
- * Profile predicate that may be {@link Environment#acceptsProfiles(Profiles) accepted} by
- * an {@link Environment}.
- * <p>
- * May be implemented directly or, more usually, created using the {@link #of(String...)
- * of(...)} factory method.
+ * Profile predicate that may be {@linkplain Environment#acceptsProfiles(Profiles)
+ * accepted} by an {@link Environment}.
+ *
+ * <p>May be implemented directly or, more usually, created using the
+ * {@link #of(String...) of(...)} factory method.
  *
  * @author Phillip Webb
  * @since 5.1
@@ -32,31 +32,36 @@ import java.util.function.Predicate;
 public interface Profiles {
 
 	/**
-	 * Test if this profile predicate matches against given active profiles.
-	 * @param activeProfiles test whether a given profile is currently active
+	 * Test if this profile predicate matches against the given active profiles
+	 * predicate.
+	 * @param activeProfiles predicate that tests whether a given profile is
+	 * currently active
 	 */
 	boolean matches(Predicate<String> activeProfiles);
 
 	/**
 	 * Return a new {@link Profiles} instance that checks for matches against the given
-	 * profile strings. The returned instance will
-	 * {@link Profiles#matches(Predicate)} match} if any one of the given profile strings
-	 * match.
-	 * <p>
-	 * A profile string may contains a simple profile name (for example
-	 * {@code "production"}) or a profile expression. A profile expression allows for more
-	 * complicated profile logic to be expressed, for example
+	 * profile strings.
+	 *
+	 * <p>The returned instance will {@linkplain Profiles#matches(Predicate) match}
+	 * if any one of the given profile strings matches.
+	 *
+	 * <p>A profile string may contain a simple profile name (for example
+	 * {@code "production"}) or a profile expression. A profile expression allows
+	 * for more complicated profile logic to be expressed, for example
 	 * {@code "production & cloud"}.
-	 * <p>
-	 * The following operators are supported in profile expressions:
+	 *
+	 * <p>The following operators are supported in profile expressions:
 	 * <ul>
 	 * <li>{@code !} - A logical <em>not</em> of the profile</li>
 	 * <li>{@code &} - A logical <em>and</em> of the profiles</li>
-	 * <li>{@code |} - A logical <em>or</em> of the profiles</li></li>
-	 * <p>
-	 * Please note that the {@code &} and {@code |} operators may not be mixed without
-	 * using parentheses. For example {@code "a & b | c"} is not a valid expression, it
-	 * must be expressed as {@code "(a & b) | c"}.
+	 * <li>{@code |} - A logical <em>or</em> of the profiles</li>
+	 * </ul>
+	 *
+	 * <p>Please note that the {@code &} and {@code |} operators may not be mixed
+	 * without using parentheses. For example {@code "a & b | c"} is not a valid
+	 * expression; it must be expressed as {@code "(a & b) | c"} or
+	 * {@code "a & (b | c)"}.
 	 *
 	 * @param profiles the profiles to include
 	 * @return a new {@link Profiles} instance

spring-core/src/main/java/org/springframework/core/env/ProfilesParser.java

@@ -19,7 +19,6 @@ package org.springframework.core.env;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
-import java.util.Set;
 import java.util.StringTokenizer;
 import java.util.function.Predicate;
 
@@ -30,6 +29,7 @@ import org.springframework.util.StringUtils;
  * Internal parser used by {@link Profiles#of}.
  *
  * @author Phillip Webb
+ * @since 5.1
  */
 class ProfilesParser {
 
@@ -43,7 +43,7 @@ class ProfilesParser {
 	}
 
 	private static Profiles parseExpression(String expression) {
-		Assert.hasText(expression,
+		Assert.hasText(expression, () ->
 				"Invalid profile expression [" + expression + "]: must contain text");
 		StringTokenizer tokens = new StringTokenizer(expression, "()&|!", true);
 		return parseTokens(expression, tokens);
@@ -97,7 +97,7 @@ class ProfilesParser {
 
 	private static void assertWellFormed(String expression, boolean wellFormed) {
 		Assert.isTrue(wellFormed,
-				() -> "Malformed profile expression '" + expression + "'");
+				() -> "Malformed profile expression [" + expression + "]");
 	}
 
 	private static Profiles or(Profiles... profiles) {
@@ -122,7 +122,7 @@ class ProfilesParser {
 		return (profiles) -> profiles.matches(activeProfile);
 	}
 
-	enum Operator {
+	private enum Operator {
 		AND,
 		OR
 	}