/*
    * SPDX-FileCopyrightText: none
    * SPDX-License-Identifier: CC0-1.0
    */
   
   package dev.metaschema.databind.io.json;
   
   import java.io.IOException;
   import java.util.HashSet;
  import java.util.Set;
  
  import dev.metaschema.core.model.IBoundObject;
  import dev.metaschema.core.model.util.JsonUtil;
  import dev.metaschema.databind.io.AbstractProblemHandler;
  import dev.metaschema.databind.model.IBoundDefinitionModelComplex;
  
  /**
   * This problem handler implementation handles common issues when parsing
   * JSON-based Metaschema module instances.
   */
  public class DefaultJsonProblemHandler
      extends AbstractProblemHandler
      implements IJsonProblemHandler {
    private static final String JSON_SCHEMA_FIELD_NAME = "$schema";
    private static final Set<String> IGNORED_FIELD_NAMES;
  
    static {
      IGNORED_FIELD_NAMES = new HashSet<>();
      IGNORED_FIELD_NAMES.add(JSON_SCHEMA_FIELD_NAME);
    }
  
    /**
     * Construct a new problem handler with required field validation enabled.
     */
    public DefaultJsonProblemHandler() {
      super();
    }
  
    /**
     * Construct a new problem handler with the specified validation setting.
     *
     * @param validateRequiredFields
     *          {@code true} to validate that required fields are present,
     *          {@code false} to skip validation
     */
    public DefaultJsonProblemHandler(boolean validateRequiredFields) {
      super(validateRequiredFields);
    }
  
    @Override
    public boolean handleUnknownProperty(
        IBoundDefinitionModelComplex classBinding,
        IBoundObject targetObject,
        String fieldName,
        IJsonParsingContext parsingContext) throws IOException {
      boolean retval = false;
      if (IGNORED_FIELD_NAMES.contains(fieldName)) {
        JsonUtil.skipNextValue(parsingContext.getReader(), parsingContext.getSource());
        retval = true;
      }
      return retval;
    }
  }