/
AnnotationsPropertySource.java
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/
AnnotationsPropertySource.java
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/*
* 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.test.autoconfigure.properties;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.util.LinkedHashMap;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.springframework.core.annotation.MergedAnnotation;
import org.springframework.core.annotation.MergedAnnotationPredicates;
import org.springframework.core.annotation.MergedAnnotations;
import org.springframework.core.annotation.MergedAnnotations.SearchStrategy;
import org.springframework.core.env.EnumerablePropertySource;
import org.springframework.test.context.TestContextAnnotationUtils;
import org.springframework.util.ObjectUtils;
import org.springframework.util.StringUtils;
/**
* {@link EnumerablePropertySource} to adapt annotations marked with
* {@link PropertyMapping @PropertyMapping}.
*
* @author Phillip Webb
* @author Andy Wilkinson
* @since 1.4.0
*/
public class AnnotationsPropertySource extends EnumerablePropertySource<Class<?>> {
private static final Pattern CAMEL_CASE_PATTERN = Pattern.compile("([^A-Z-])([A-Z])");
private final Map<String, Object> properties;
public AnnotationsPropertySource(Class<?> source) {
this("Annotations", source);
}
public AnnotationsPropertySource(String name, Class<?> source) {
super(name, source);
this.properties = getProperties(source);
}
private Map<String, Object> getProperties(Class<?> source) {
Map<String, Object> properties = new LinkedHashMap<>();
getProperties(source, properties);
return properties;
}
private void getProperties(Class<?> source, Map<String, Object> properties) {
MergedAnnotations.from(source, SearchStrategy.SUPERCLASS).stream()
.filter(MergedAnnotationPredicates.unique(MergedAnnotation::getType)).forEach((annotation) -> {
Class<Annotation> type = annotation.getType();
MergedAnnotation<?> typeMapping = MergedAnnotations.from(type).get(PropertyMapping.class,
MergedAnnotation::isDirectlyPresent);
String prefix = typeMapping.getValue(MergedAnnotation.VALUE, String.class).orElse("");
SkipPropertyMapping defaultSkip = typeMapping.getValue("skip", SkipPropertyMapping.class)
.orElse(SkipPropertyMapping.YES);
for (Method attribute : type.getDeclaredMethods()) {
collectProperties(prefix, defaultSkip, annotation, attribute, properties);
}
});
if (TestContextAnnotationUtils.searchEnclosingClass(source)) {
getProperties(source.getEnclosingClass(), properties);
}
}
private void collectProperties(String prefix, SkipPropertyMapping skip, MergedAnnotation<?> annotation,
Method attribute, Map<String, Object> properties) {
MergedAnnotation<?> attributeMapping = MergedAnnotations.from(attribute).get(PropertyMapping.class);
skip = attributeMapping.getValue("skip", SkipPropertyMapping.class).orElse(skip);
if (skip == SkipPropertyMapping.YES) {
return;
}
Optional<Object> value = annotation.getValue(attribute.getName());
if (!value.isPresent()) {
return;
}
if (skip == SkipPropertyMapping.ON_DEFAULT_VALUE) {
if (ObjectUtils.nullSafeEquals(value.get(), annotation.getDefaultValue(attribute.getName()).orElse(null))) {
return;
}
}
String name = getName(prefix, attributeMapping, attribute);
putProperties(name, skip, value.get(), properties);
}
private String getName(String prefix, MergedAnnotation<?> attributeMapping, Method attribute) {
String name = attributeMapping.getValue(MergedAnnotation.VALUE, String.class).orElse("");
if (!StringUtils.hasText(name)) {
name = toKebabCase(attribute.getName());
}
return dotAppend(prefix, name);
}
private String toKebabCase(String name) {
Matcher matcher = CAMEL_CASE_PATTERN.matcher(name);
StringBuffer result = new StringBuffer();
while (matcher.find()) {
matcher.appendReplacement(result, matcher.group(1) + '-' + StringUtils.uncapitalize(matcher.group(2)));
}
matcher.appendTail(result);
return result.toString().toLowerCase(Locale.ENGLISH);
}
private String dotAppend(String prefix, String postfix) {
if (StringUtils.hasText(prefix)) {
return prefix.endsWith(".") ? prefix + postfix : prefix + "." + postfix;
}
return postfix;
}
private void putProperties(String name, SkipPropertyMapping defaultSkip, Object value,
Map<String, Object> properties) {
if (ObjectUtils.isArray(value)) {
Object[] array = ObjectUtils.toObjectArray(value);
for (int i = 0; i < array.length; i++) {
putProperties(name + "[" + i + "]", defaultSkip, array[i], properties);
}
}
else if (value instanceof MergedAnnotation<?>) {
MergedAnnotation<?> annotation = (MergedAnnotation<?>) value;
for (Method attribute : annotation.getType().getDeclaredMethods()) {
collectProperties(name, defaultSkip, (MergedAnnotation<?>) value, attribute, properties);
}
}
else {
properties.put(name, value);
}
}
@Override
public boolean containsProperty(String name) {
return this.properties.containsKey(name);
}
@Override
public Object getProperty(String name) {
return this.properties.get(name);
}
@Override
public String[] getPropertyNames() {
return StringUtils.toStringArray(this.properties.keySet());
}
public boolean isEmpty() {
return this.properties.isEmpty();
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
return this.properties.equals(((AnnotationsPropertySource) obj).properties);
}
@Override
public int hashCode() {
return this.properties.hashCode();
}
}