content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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.apache.avro;
  
  import java.io.IOException;
  import java.net.URI;
  
  /**
   * Schema parser for JSON formatted schemata. This initial implementation simply
   * delegates to the {@link Schema.Parser} class, though it should be refactored
   * out of there.
   *
   * <p>
   * Note: this class is intentionally not available via the Java
   * {@link java.util.ServiceLoader}, as its use is hardcoded as fallback when no
   * service exists. This enables users to reliably override the standard JSON
   * parser as well.
   * </p>
   */
  public class JsonSchemaParser implements FormattedSchemaParser {
    /**
     * <p>
     * Parse a schema written in the internal (JSON) format without any validations.
     * </p>
     *
     * <p>
     * Using this method is only safe if used to parse a write schema (i.e., a
     * schema used to read Avro data). Other usages, for example by generated Avro
     * code, can cause interoperability problems.
     * </p>
     *
     * <p>
     * Use with care and sufficient testing!
     * </p>
     *
     * @param fragments one or more strings making up the schema (some schemata
     *                  exceed the compiler limits)
     * @return the parsed schema
     */
    public static Schema parseInternal(String... fragments) {
      StringBuilder buffer = new StringBuilder();
      for (String fragment : fragments) {
        buffer.append(fragment);
      }
  
      boolean saved = Schema.getValidateDefaults();
      try {
        Schema.setValidateDefaults(false);
        ParseContext context = new ParseContext(NameValidator.NO_VALIDATION);
        Schema schema = new JsonSchemaParser().parse(context, buffer, true);
        context.commit();
        context.resolveAllSchemas();
        return context.resolve(schema);
      } finally {
        Schema.setValidateDefaults(saved);
      }
    }
  
    @Override
    public Schema parse(ParseContext parseContext, URI baseUri, CharSequence formattedSchema)
        throws IOException, SchemaParseException {
      return parse(parseContext, formattedSchema, false);
    }
  
    private Schema parse(ParseContext parseContext, CharSequence formattedSchema, boolean allowInvalidDefaults)
        throws SchemaParseException {
      Schema.Parser parser = new Schema.Parser(parseContext);
      if (allowInvalidDefaults) {
        parser.setValidateDefaults(false);
      }
      return parser.parseInternal(formattedSchema.toString());
    }
  }
  