Use most specific getter when generating metadata

This commit makes sure to use the most specific getter if more than
one candidate exists.

Closes gh-24002

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java

@@ -38,6 +38,7 @@ import org.springframework.boot.configurationsample.simple.SimpleTypeProperties;
 import org.springframework.boot.configurationsample.specific.AnnotatedGetter;
 import org.springframework.boot.configurationsample.specific.BoxingPojo;
 import org.springframework.boot.configurationsample.specific.BuilderPojo;
+import org.springframework.boot.configurationsample.specific.DeprecatedLessPreciseTypePojo;
 import org.springframework.boot.configurationsample.specific.DeprecatedUnrelatedMethodPojo;
 import org.springframework.boot.configurationsample.specific.DoubleRegistrationProperties;
 import org.springframework.boot.configurationsample.specific.EmptyDefaultValueProperties;
@@ -192,12 +193,22 @@ class ConfigurationMetadataAnnotationProcessorTests extends AbstractMetadataGene
 	}
 
 	@Test
-	void boxingOnSetter() {
+	void deprecatedWithLessPreciseType() {
+		Class<?> type = DeprecatedLessPreciseTypePojo.class;
+		ConfigurationMetadata metadata = compile(type);
+		assertThat(metadata).has(Metadata.withGroup("not.deprecated").fromSource(type));
+		assertThat(metadata).has(Metadata.withProperty("not.deprecated.flag", Boolean.class).withDefaultValue(false)
+				.withNoDeprecation().fromSource(type));
+	}
+
+	@Test
+	void typBoxing() {
 		Class<?> type = BoxingPojo.class;
 		ConfigurationMetadata metadata = compile(type);
 		assertThat(metadata).has(Metadata.withGroup("boxing").fromSource(type));
 		assertThat(metadata)
 				.has(Metadata.withProperty("boxing.flag", Boolean.class).withDefaultValue(false).fromSource(type));
+		assertThat(metadata).has(Metadata.withProperty("boxing.another-flag", Boolean.class).fromSource(type));
 		assertThat(metadata).has(Metadata.withProperty("boxing.counter", Integer.class).fromSource(type));
 	}
 

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/specific/BoxingPojo.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2019 the original author or authors.
+ * Copyright 2012-2020 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.
@@ -29,6 +29,8 @@ public class BoxingPojo {
 
 	private boolean flag;
 
+	private Boolean anotherFlag;
+
 	private Integer counter;
 
 	public boolean isFlag() {
@@ -40,6 +42,14 @@ public class BoxingPojo {
 		this.flag = flag;
 	}
 
+	public boolean isAnotherFlag() {
+		return Boolean.TRUE.equals(this.anotherFlag);
+	}
+
+	public void setAnotherFlag(boolean anotherFlag) {
+		this.anotherFlag = anotherFlag;
+	}
+
 	public Integer getCounter() {
 		return this.counter;
 	}

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/specific/DeprecatedLessPreciseTypePojo.java

@@ -0,0 +1,50 @@
+/*
+ * Copyright 2012-2020 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.boot.configurationsample.specific;
+
+import org.springframework.boot.configurationsample.ConfigurationProperties;
+
+/**
+ * Demonstrate that deprecating accessor with not the same type is not taken into account
+ * to detect the deprecated flag.
+ *
+ * @author Stephane Nicoll
+ */
+@ConfigurationProperties("not.deprecated")
+public class DeprecatedLessPreciseTypePojo {
+
+	private boolean flag;
+
+	@Deprecated
+	public Boolean getFlag() {
+		return this.flag;
+	}
+
+	public boolean isFlag() {
+		return this.flag;
+	}
+
+	public void setFlag(boolean flag) {
+		this.flag = flag;
+	}
+
+	@Deprecated
+	public void setFlag(Boolean flag) {
+		this.flag = flag;
+	}
+
+}