feat: allow case-insensitive boolean conversion (#293)

Author: cschierle

src/main/java/net/kaczmarzyk/spring/data/jpa/utils/Converter.java

@@ -141,7 +141,7 @@ public <T> T convert(String value, Class<T> expectedClass, boolean ignoreCase) {
 		if (expectedClass.isEnum()) {
 			return (T) convertToEnum(value, (Class<? extends Enum<?>>) expectedClass, ignoreCase);
 		} else if (isAssignableFromAnyOf(expectedClass, Boolean.class, boolean.class)) {
-			return (T) convertToBoolean(value);
+			return (T) convertToBoolean(value, ignoreCase);
 		} else if (isAssignableFromAnyOf(expectedClass, Integer.class, int.class, Long.class, long.class)) {
 			return (T) convertToLong(value);
 		} else if (isAssignableFromAnyOf(expectedClass, float.class, Float.class)) {
@@ -240,10 +240,11 @@ private BigDecimal convertToBigDecimal(String value) {
 		}
 	}
 
-	private Boolean convertToBoolean(String value) {
-		if ("true".equals(value)) {
+	private Boolean convertToBoolean(String value, boolean ignoreCase) {
+        var valueToParse = ignoreCase ? value.toLowerCase() : value;
+		if ("true".equals(valueToParse)) {
 			return true;
-		} else if ("false".equals(value)) {
+		} else if ("false".equals(valueToParse)) {
 			return false;
 		} else {
 			throw new ValueRejectedException(value, "unparseable boolean");

src/test/java/net/kaczmarzyk/spring/data/jpa/utils/converter/ConverterTest.java

@@ -82,16 +82,28 @@ public void convertsToBoolean() {
 		assertThat(converter.convert("true", Boolean.class)).isEqualTo(true);
 		assertThat(converter.convert("false", Boolean.class)).isEqualTo(false);
 	}
-	
+
+	@Test
+	public void convertsToBooleanIgnoringCase() {
+		assertThat(converter.convert("TRUE", Boolean.class, true)).isEqualTo(true);
+		assertThat(converter.convert("FALSE", Boolean.class, true)).isEqualTo(false);
+	}
+
 	@Test
 	public void convertsToBooleanByPrimitiveType() {
 		assertThat(converter.convert("true", boolean.class)).isEqualTo(true);
 		assertThat(converter.convert("false", boolean.class)).isEqualTo(false);
 	}
-	
+
+	@Test
+	public void convertsToBooleanByPrimitiveTypeIgnoringCase() {
+		assertThat(converter.convert("TRUE", boolean.class, true)).isEqualTo(true);
+		assertThat(converter.convert("FALSE", boolean.class, true)).isEqualTo(false);
+	}
+
 	@Test
 	public void throwsExceptionOnInvalidBooleanValue() {
-		assertThatThrownBy(() -> converter.convert("TRUE", Boolean.class))
+		assertThatThrownBy(() -> converter.convert("invalid", Boolean.class))
 				.isInstanceOf(IllegalArgumentException.class);
 	}