Support profile negation in YAML sub-documents

See gh-4953

spring-boot-docs/src/main/asciidoc/spring-boot-features.adoc

@@ -678,6 +678,10 @@ profile, and it would have to be explicitly reset in all other profiles as neces
 	    password: weak
 ----
 
+Spring profiles designated using the "spring.profiles" element may optionally be
+negated using the {@code !} character. If both negated and non-negated profiles
+are specified for a single document, at least one non-negated profile must match
+and no negated profiles may match.
 
 
 [[boot-features-external-config-yaml-shortcomings]]

spring-boot/src/main/java/org/springframework/boot/yaml/SpringProfileDocumentMatcher.java

@@ -18,23 +18,32 @@ package org.springframework.boot.yaml;
 
 import java.util.Arrays;
 import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.LinkedHashSet;
+import java.util.Map;
 import java.util.Properties;
+import java.util.Set;
 
 import org.springframework.beans.factory.config.YamlProcessor.DocumentMatcher;
 import org.springframework.beans.factory.config.YamlProcessor.MatchStatus;
 import org.springframework.core.env.Environment;
+import org.springframework.util.StringUtils;
 
 /**
  * {@link DocumentMatcher} backed by {@link Environment#getActiveProfiles()}. A YAML
- * document matches if it contains an element "spring.profiles" (a comma-separated list)
- * and one of the profiles is in the active list.
+ * document may define a "spring.profiles" element as a comma-separated list of Spring
+ * profile names, optionally negated using the {@code !} character. If both negated and
+ * non-negated profiles are specified for a single document, at least one non-negated
+ * profile must match and no negated profiles may match.
  *
  * @author Dave Syer
+ * @author Matt Benson
  */
 public class SpringProfileDocumentMatcher implements DocumentMatcher {
 
 	private static final String[] DEFAULT_PROFILES = new String[] { "^\\s*$" };
+	private static final String SPRING_PROFILES = "spring.profiles";
 
 	private String[] activeProfiles = new String[0];
 
@@ -58,7 +67,58 @@ public class SpringProfileDocumentMatcher implements DocumentMatcher {
 		if (profiles.length == 0) {
 			profiles = DEFAULT_PROFILES;
 		}
-		return new ArrayDocumentMatcher("spring.profiles", profiles).matches(properties);
+		ArrayDocumentMatcher next = new ArrayDocumentMatcher(SPRING_PROFILES, profiles);
+
+		if (properties.containsKey(SPRING_PROFILES)) {
+			properties = new Properties(properties);
+
+			Map<Boolean, String> sortedProfiles = sortProfiles(
+					properties.getProperty(SPRING_PROFILES));
+
+			// handle negated profiles:
+			if (sortedProfiles.containsKey(Boolean.FALSE)) {
+				properties.setProperty(SPRING_PROFILES,
+						sortedProfiles.get(Boolean.FALSE));
+
+				MatchStatus matchStatus = next.matches(properties);
+				switch (matchStatus) {
+				case FOUND:
+					return MatchStatus.NOT_FOUND;
+				case NOT_FOUND:
+					return MatchStatus.FOUND;
+				default:
+					break;
+				}
+			}
+			properties.setProperty(SPRING_PROFILES, sortedProfiles.get(Boolean.TRUE));
+		}
+		return next.matches(properties);
+	}
+
+	private Map<Boolean, String> sortProfiles(String value) {
+		if (value.indexOf('!') >= 0) {
+			Set<String> positive = new HashSet<String>();
+			Set<String> negative = new HashSet<String>();
+			for (String s : StringUtils.commaDelimitedListToSet(value)) {
+				if (s.charAt(0) == '!') {
+					negative.add(s.substring(1));
+				}
+				else {
+					positive.add(s);
+				}
+			}
+			if (!negative.isEmpty()) {
+				Map<Boolean, String> result = new HashMap<Boolean, String>();
+				result.put(Boolean.FALSE,
+						StringUtils.collectionToCommaDelimitedString(negative));
+				if (!positive.isEmpty()) {
+					result.put(Boolean.TRUE,
+							StringUtils.collectionToCommaDelimitedString(positive));
+				}
+				return result;
+			}
+		}
+		return Collections.singletonMap(Boolean.TRUE, value);
 	}
 
 }

spring-boot/src/test/java/org/springframework/boot/yaml/SpringProfileDocumentMatcherTests.java

@@ -0,0 +1,112 @@
+/*
+ * Copyright 2012-2016 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.
+ * You may obtain a copy of the License at
+ *
+ *      http://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.boot.yaml;
+
+import java.io.IOException;
+import java.util.Properties;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+import org.springframework.beans.factory.config.YamlProcessor.MatchStatus;
+import org.springframework.core.io.ByteArrayResource;
+import org.springframework.core.io.support.PropertiesLoaderUtils;
+
+/**
+ * Tests for {@link SpringProfileDocumentMatcher}.
+ *
+ * @author Matt Benson
+ */
+public class SpringProfileDocumentMatcherTests {
+
+	@Test
+	public void testMatchesSingleProfile() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.FOUND,
+				matcher.matches(getProperties("spring.profiles: foo")));
+	}
+
+	@Test
+	public void testAbstainNoConfiguredProfiles() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.ABSTAIN,
+				matcher.matches(getProperties("some.property: spam")));
+	}
+
+	@Test
+	public void testNoActiveProfiles() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher();
+		Assert.assertSame(MatchStatus.NOT_FOUND,
+				matcher.matches(getProperties("spring.profiles: bar,spam")));
+	}
+
+	@Test
+	public void testMatchesCommaSeparatedArray() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.FOUND,
+				matcher.matches(getProperties("spring.profiles: bar,spam")));
+	}
+
+	@Test
+	public void testNoMatchingProfiles() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.NOT_FOUND,
+				matcher.matches(getProperties("spring.profiles: baz,blah")));
+	}
+
+	@Test
+	public void testInverseMatchSingle() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.FOUND,
+				matcher.matches(getProperties("spring.profiles: !baz")));
+	}
+
+	@Test
+	public void testInverseMatchMulti() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar");
+		Assert.assertSame(MatchStatus.FOUND,
+				matcher.matches(getProperties("spring.profiles: !baz,!blah")));
+	}
+
+	@Test
+	public void testNegatedAndNonNegated() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"bar", "blah");
+		Assert.assertSame(MatchStatus.FOUND,
+				matcher.matches(getProperties("spring.profiles: !baz,blah")));
+	}
+
+	@Test
+	public void testNegatedTrumpsMatching() throws IOException {
+		SpringProfileDocumentMatcher matcher = new SpringProfileDocumentMatcher("foo",
+				"baz", "blah");
+		Assert.assertSame(MatchStatus.NOT_FOUND,
+				matcher.matches(getProperties("spring.profiles: !baz,blah")));
+	}
+
+	private Properties getProperties(String values) throws IOException {
+		return PropertiesLoaderUtils
+				.loadProperties(new ByteArrayResource(values.getBytes()));
+	}
+
+}