spring security JsonNodeUtils 源码
spring security JsonNodeUtils 代码
文件路径：/oauth2/oauth2-client/src/main/java/org/springframework/security/oauth2/client/jackson2/JsonNodeUtils.java
/*
* Copyright 2002-2020 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.security.oauth2.client.jackson2;
import java.util.Map;
import java.util.Set;
import com.fasterxml.jackson.core.type.TypeReference;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
/**
* Utility class for {@code JsonNode}.
*
* @author Joe Grandja
* @since 5.3
*/
abstract class JsonNodeUtils {
static final TypeReference<Set<String>> STRING_SET = new TypeReference<Set<String>>() {
};
static final TypeReference<Map<String, Object>> STRING_OBJECT_MAP = new TypeReference<Map<String, Object>>() {
};
static String findStringValue(JsonNode jsonNode, String fieldName) {
if (jsonNode == null) {
return null;
}
JsonNode value = jsonNode.findValue(fieldName);
return (value != null && value.isTextual()) ? value.asText() : null;
}
static <T> T findValue(JsonNode jsonNode, String fieldName, TypeReference<T> valueTypeReference,
ObjectMapper mapper) {
if (jsonNode == null) {
return null;
}
JsonNode value = jsonNode.findValue(fieldName);
return (value != null && value.isContainerNode()) ? mapper.convertValue(value, valueTypeReference) : null;
}
static JsonNode findObjectNode(JsonNode jsonNode, String fieldName) {
if (jsonNode == null) {
return null;
}
JsonNode value = jsonNode.findValue(fieldName);
return (value != null && value.isObject()) ? value : null;
}
}
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