SchemaErrorMessageCustomizer.java

/*
 * Copyright 2014-2016 CyberVision, 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 org.kaaproject.kaa.server.admin.client.util;

public class SchemaErrorMessageCustomizer implements ErrorMessageCustomizer {

  private static final String LEFT_SQUARE_BRACKET = "[";
  private static final String RIGHT_SQUARE_BRACKET = "]";
  private static final String SEMICOLON = ";";

  @Override
  public String customizeErrorMessage(Throwable caught) {
    String origMessage = caught.getLocalizedMessage();
    String errorMessage = null;
    int leftSquareBracketIndex = origMessage.indexOf(LEFT_SQUARE_BRACKET);
    int rightSquareBracketIndex = -1;
    if (leftSquareBracketIndex != -1) {
      rightSquareBracketIndex = origMessage.indexOf(RIGHT_SQUARE_BRACKET, leftSquareBracketIndex);
    }
    if (rightSquareBracketIndex != -1) {
      StringBuilder builder = new StringBuilder();
      builder.append("Incorrect json schema: Please check your schema at");
      String[] array = origMessage.substring(leftSquareBracketIndex, rightSquareBracketIndex)
              .split(SEMICOLON);
      if (array != null && array.length == 2) {
        builder.append(array[1]);
        errorMessage = builder.toString();
      }
    }
    return errorMessage;
  }

}