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/*
* Copyright (c) 2016 Network New Technologies Inc.
*
* 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 com.networknt.schema;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.DecimalNode;
import com.fasterxml.jackson.databind.node.NullNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.math.BigDecimal;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* {@link JsonValidator} for enum.
*/
public class EnumValidator extends BaseJsonValidator implements JsonValidator {
private static final Logger logger = LoggerFactory.getLogger(EnumValidator.class);
private final Set<JsonNode> nodes;
private final String error;
public EnumValidator(SchemaLocation schemaLocation, JsonNodePath evaluationPath, JsonNode schemaNode, JsonSchema parentSchema, ValidationContext validationContext) {
super(schemaLocation, evaluationPath, schemaNode, parentSchema, ValidatorTypeCode.ENUM, validationContext);
if (schemaNode != null && schemaNode.isArray()) {
nodes = new HashSet<JsonNode>();
StringBuilder sb = new StringBuilder();
sb.append('[');
String separator = "";
for (JsonNode n : schemaNode) {
if (n.isNumber()) {
// convert to DecimalNode for number comparison
nodes.add(processNumberNode(n));
} else if (n.isArray()) {
ArrayNode a = processArrayNode((ArrayNode) n);
nodes.add(a);
} else {
nodes.add(n);
}
sb.append(separator);
sb.append(n.asText());
separator = ", ";
}
// check if the parent schema declares the fields as nullable
if (validationContext.getConfig().isHandleNullableField()) {
JsonNode nullable = parentSchema.getSchemaNode().get("nullable");
if (nullable != null && nullable.asBoolean()) {
nodes.add(NullNode.getInstance());
separator = ", ";
sb.append(separator);
sb.append("null");
}
}
sb.append(']');
error = sb.toString();
} else {
nodes = Collections.emptySet();
error = "[none]";
}
}
public Set<ValidationMessage> validate(ExecutionContext executionContext, JsonNode node, JsonNode rootNode, JsonNodePath instanceLocation) {
debug(logger, node, rootNode, instanceLocation);
if (node.isNumber()) {
node = processNumberNode(node);
} else if (node.isArray()) {
node = processArrayNode((ArrayNode) node);
}
if (!nodes.contains(node) && !( this.validationContext.getConfig().isTypeLoose() && isTypeLooseContainsInEnum(node))) {
return Collections.singleton(message().instanceNode(node).instanceLocation(instanceLocation)
.locale(executionContext.getExecutionConfig().getLocale())
.failFast(executionContext.isFailFast()).arguments(error).build());
}
return Collections.emptySet();
}
/**
* Check whether enum contains the value of the JsonNode if the typeLoose is enabled.
*
* @param node JsonNode to check
*/
private boolean isTypeLooseContainsInEnum(JsonNode node) {
if (TypeFactory.getValueNodeType(node, this.validationContext.getConfig()) == JsonType.STRING) {
String nodeText = node.textValue();
for (JsonNode n : nodes) {
String value = n.asText();
if (value != null && value.equals(nodeText)) {
return true;
}
}
}
return false;
}
/**
* Processes the number and ensures trailing zeros are stripped.
*
* @param n the node
* @return the node
*/
protected JsonNode processNumberNode(JsonNode n) {
return DecimalNode.valueOf(new BigDecimal(n.decimalValue().toPlainString()));
}
/**
* Processes the array and ensures that numbers within have trailing zeroes stripped.
*
* @param node the node
* @return the node
*/
protected ArrayNode processArrayNode(ArrayNode node) {
if (!hasNumber(node)) {
return node;
}
ArrayNode a = (ArrayNode) node.deepCopy();
for (int x = 0; x < a.size(); x++) {
JsonNode v = a.get(x);
if (v.isNumber()) {
v = processNumberNode(v);
a.set(x, v);
}
}
return a;
}
/**
* Determines if the array node contains a number.
*
* @param node the node
* @return the node
*/
protected boolean hasNumber(ArrayNode node) {
for (int x = 0; x < node.size(); x++) {
JsonNode v = node.get(x);
if (v.isNumber()) {
return true;
}
}
return false;
}
}
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