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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.ObjectNode;
import com.networknt.schema.annotation.JsonNodeAnnotation;
import com.networknt.schema.i18n.DefaultMessageSource;
import org.slf4j.Logger;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import java.util.function.Consumer;
public abstract class BaseJsonValidator extends ValidationMessageHandler implements JsonValidator {
protected final boolean suppressSubSchemaRetrieval;
protected final JsonNode schemaNode;
protected ValidationContext validationContext;
public BaseJsonValidator(SchemaLocation schemaLocation, JsonNodePath evaluationPath, JsonNode schemaNode,
JsonSchema parentSchema, ValidatorTypeCode validatorType, ValidationContext validationContext) {
this(schemaLocation, evaluationPath, schemaNode, parentSchema, validatorType, validatorType, validationContext,
false);
}
public BaseJsonValidator(SchemaLocation schemaLocation, JsonNodePath evaluationPath, JsonNode schemaNode,
JsonSchema parentSchema, ErrorMessageType errorMessageType, Keyword keyword,
ValidationContext validationContext, boolean suppressSubSchemaRetrieval) {
super(errorMessageType,
(validationContext != null && validationContext.getConfig() != null)
? validationContext.getConfig().isCustomMessageSupported()
: true,
(validationContext != null && validationContext.getConfig() != null)
? validationContext.getConfig().getMessageSource()
: DefaultMessageSource.getInstance(),
keyword,
parentSchema, schemaLocation, evaluationPath);
this.validationContext = validationContext;
this.schemaNode = schemaNode;
this.suppressSubSchemaRetrieval = suppressSubSchemaRetrieval;
}
/**
* Copy constructor.
*
* @param copy to copy from
*/
protected BaseJsonValidator(BaseJsonValidator copy) {
super(copy);
this.suppressSubSchemaRetrieval = copy.suppressSubSchemaRetrieval;
this.schemaNode = copy.schemaNode;
this.validationContext = copy.validationContext;
}
private static JsonSchema obtainSubSchemaNode(final JsonNode schemaNode, final ValidationContext validationContext) {
final JsonNode node = schemaNode.get("id");
if (node == null) {
return null;
}
if (node.equals(schemaNode.get("$schema"))) {
return null;
}
final String text = node.textValue();
if (text == null) {
return null;
}
final SchemaLocation schemaLocation = SchemaLocation.of(node.textValue());
return validationContext.getJsonSchemaFactory().getSchema(schemaLocation, validationContext.getConfig());
}
protected static boolean equals(double n1, double n2) {
return Math.abs(n1 - n2) < 1e-12;
}
protected static void debug(Logger logger, JsonNode node, JsonNode rootNode, JsonNodePath instanceLocation) {
logger.debug("validate( {}, {}, {})", node, rootNode, instanceLocation);
}
/**
* Checks based on the current {@link DiscriminatorContext} whether the provided {@link JsonSchema} a match against
* against the current discriminator.
*
* @param currentDiscriminatorContext the currently active {@link DiscriminatorContext}
* @param discriminator the discriminator to use for the check
* @param discriminatorPropertyValue the value of the discriminator/propertyName field
* @param jsonSchema the {@link JsonSchema} to check
*/
protected static void checkDiscriminatorMatch(final DiscriminatorContext currentDiscriminatorContext,
final ObjectNode discriminator,
final String discriminatorPropertyValue,
final JsonSchema jsonSchema) {
if (discriminatorPropertyValue == null) {
currentDiscriminatorContext.markMatch();
return;
}
final JsonNode discriminatorMapping = discriminator.get("mapping");
if (null == discriminatorMapping) {
checkForImplicitDiscriminatorMappingMatch(currentDiscriminatorContext,
discriminatorPropertyValue,
jsonSchema);
} else {
checkForExplicitDiscriminatorMappingMatch(currentDiscriminatorContext,
discriminatorPropertyValue,
discriminatorMapping,
jsonSchema);
if (!currentDiscriminatorContext.isDiscriminatorMatchFound()
&& noExplicitDiscriminatorKeyOverride(discriminatorMapping, jsonSchema)) {
checkForImplicitDiscriminatorMappingMatch(currentDiscriminatorContext,
discriminatorPropertyValue,
jsonSchema);
}
}
}
/**
* Rolls up all nested and compatible discriminators to the root discriminator of the type. Detects attempts to redefine
* the propertyName or mappings.
*
* @param currentDiscriminatorContext the currently active {@link DiscriminatorContext}
* @param discriminator the discriminator to use for the check
* @param schema the value of the discriminator/propertyName field
* @param instanceLocation the logging prefix
*/
protected static void registerAndMergeDiscriminator(final DiscriminatorContext currentDiscriminatorContext,
final ObjectNode discriminator,
final JsonSchema schema,
final JsonNodePath instanceLocation) {
final JsonNode discriminatorOnSchema = schema.schemaNode.get("discriminator");
if (null != discriminatorOnSchema && null != currentDiscriminatorContext
.getDiscriminatorForPath(schema.schemaLocation)) {
// this is where A -> B -> C inheritance exists, A has the root discriminator and B adds to the mapping
final JsonNode propertyName = discriminatorOnSchema.get("propertyName");
if (null != propertyName) {
throw new JsonSchemaException(instanceLocation + " schema " + schema + " attempts redefining the discriminator property");
}
final ObjectNode mappingOnContextDiscriminator = (ObjectNode) discriminator.get("mapping");
final ObjectNode mappingOnCurrentSchemaDiscriminator = (ObjectNode) discriminatorOnSchema.get("mapping");
if (null == mappingOnContextDiscriminator && null != mappingOnCurrentSchemaDiscriminator) {
// here we have a mapping on a nested discriminator and none on the root discriminator, so we can simply
// make it the root's
discriminator.set("mapping", discriminatorOnSchema);
} else if (null != mappingOnContextDiscriminator && null != mappingOnCurrentSchemaDiscriminator) {
// here we have to merge. The spec doesn't specify anything on this, but here we don't accept redefinition of
// mappings that already exist
final Iterator> fieldsToAdd = mappingOnCurrentSchemaDiscriminator.fields();
while (fieldsToAdd.hasNext()) {
final Map.Entry fieldToAdd = fieldsToAdd.next();
final String mappingKeyToAdd = fieldToAdd.getKey();
final JsonNode mappingValueToAdd = fieldToAdd.getValue();
final JsonNode currentMappingValue = mappingOnContextDiscriminator.get(mappingKeyToAdd);
if (null != currentMappingValue && currentMappingValue != mappingValueToAdd) {
throw new JsonSchemaException(instanceLocation + "discriminator mapping redefinition from " + mappingKeyToAdd
+ "/" + currentMappingValue + " to " + mappingValueToAdd);
} else if (null == currentMappingValue) {
mappingOnContextDiscriminator.set(mappingKeyToAdd, mappingValueToAdd);
}
}
}
}
currentDiscriminatorContext.registerDiscriminator(schema.schemaLocation, discriminator);
}
private static void checkForImplicitDiscriminatorMappingMatch(final DiscriminatorContext currentDiscriminatorContext,
final String discriminatorPropertyValue,
final JsonSchema schema) {
if (schema.schemaLocation.getFragment().getName(-1).equals(discriminatorPropertyValue)) {
currentDiscriminatorContext.markMatch();
}
}
private static void checkForExplicitDiscriminatorMappingMatch(final DiscriminatorContext currentDiscriminatorContext,
final String discriminatorPropertyValue,
final JsonNode discriminatorMapping,
final JsonSchema schema) {
final Iterator> explicitMappings = discriminatorMapping.fields();
while (explicitMappings.hasNext()) {
final Map.Entry candidateExplicitMapping = explicitMappings.next();
if (candidateExplicitMapping.getKey().equals(discriminatorPropertyValue)
&& ("#" + schema.schemaLocation.getFragment().toString())
.equals(candidateExplicitMapping.getValue().asText())) {
currentDiscriminatorContext.markMatch();
break;
}
}
}
private static boolean noExplicitDiscriminatorKeyOverride(final JsonNode discriminatorMapping,
final JsonSchema parentSchema) {
final Iterator> explicitMappings = discriminatorMapping.fields();
while (explicitMappings.hasNext()) {
final Map.Entry candidateExplicitMapping = explicitMappings.next();
if (candidateExplicitMapping.getValue().asText()
.equals(parentSchema.schemaLocation.getFragment().toString())) {
return false;
}
}
return true;
}
@Override
public SchemaLocation getSchemaLocation() {
return this.schemaLocation;
}
@Override
public JsonNodePath getEvaluationPath() {
return this.evaluationPath;
}
@Override
public String getKeyword() {
return this.keyword.getValue();
}
public JsonNode getSchemaNode() {
return this.schemaNode;
}
/**
* Gets the parent schema.
*
* This is the lexical parent schema.
*
* @return the parent schema
*/
public JsonSchema getParentSchema() {
return this.parentSchema;
}
/**
* Gets the evaluation parent schema.
*
* This is the dynamic parent schema when following references.
*
* @see JsonSchema#fromRef(JsonSchema, JsonNodePath)
* @return the evaluation parent schema
*/
public JsonSchema getEvaluationParentSchema() {
if (this.evaluationParentSchema != null) {
return this.evaluationParentSchema;
}
return getParentSchema();
}
protected JsonSchema fetchSubSchemaNode(ValidationContext validationContext) {
return this.suppressSubSchemaRetrieval ? null : obtainSubSchemaNode(this.schemaNode, validationContext);
}
public Set validate(ExecutionContext executionContext, JsonNode node) {
return validate(executionContext, node, node, atRoot());
}
protected String getNodeFieldType() {
JsonNode typeField = this.getParentSchema().getSchemaNode().get("type");
if (typeField != null) {
return typeField.asText();
}
return null;
}
protected void preloadJsonSchemas(final Collection schemas) {
for (final JsonSchema schema : schemas) {
schema.initializeValidators();
}
}
/**
* Get the root path.
*
* @return The path.
*/
protected JsonNodePath atRoot() {
return new JsonNodePath(this.validationContext.getConfig().getPathType());
}
@Override
public String toString() {
return getEvaluationPath().getName(-1);
}
/**
* Determines if the keyword exists adjacent in the evaluation path.
*
* This does not check if the keyword exists in the current meta schema as this
* can be a cross-draft case where the properties keyword is in a Draft 7 schema
* and the unevaluatedProperties keyword is in an outer Draft 2020-12 schema.
*
* The fact that the validator exists in the evaluation path implies that the
* keyword was valid in whatever meta schema for that schema it was created for.
*
* @param keyword the keyword to check
* @return true if found
*/
protected boolean hasAdjacentKeywordInEvaluationPath(String keyword) {
boolean hasValidator = false;
JsonSchema schema = getEvaluationParentSchema();
while (schema != null) {
for (JsonValidator validator : schema.getValidators()) {
if (keyword.equals(validator.getKeyword())) {
hasValidator = true;
break;
}
}
if (hasValidator) {
break;
}
schema = schema.getEvaluationParentSchema();
}
return hasValidator;
}
@Override
protected MessageSourceValidationMessage.Builder message() {
return super.message().schemaNode(this.schemaNode);
}
/**
* Determine if annotations should be reported.
*
* @param executionContext the execution context
* @return true if annotations should be reported
*/
protected boolean collectAnnotations(ExecutionContext executionContext) {
return collectAnnotations(executionContext, getKeyword());
}
/**
* Determine if annotations should be reported.
*
* @param executionContext the execution context
* @param keyword the keyword
* @return true if annotations should be reported
*/
protected boolean collectAnnotations(ExecutionContext executionContext, String keyword) {
return executionContext.getExecutionConfig().isAnnotationCollectionEnabled()
&& executionContext.getExecutionConfig().getAnnotationCollectionFilter().test(keyword);
}
/**
* Puts an annotation.
*
* @param executionContext the execution context
* @param customizer to customize the annotation
*/
protected void putAnnotation(ExecutionContext executionContext, Consumer customizer) {
JsonNodeAnnotation.Builder builder = JsonNodeAnnotation.builder().evaluationPath(this.evaluationPath)
.schemaLocation(this.schemaLocation).keyword(getKeyword());
customizer.accept(builder);
executionContext.getAnnotations().put(builder.build());
}
}