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/*
 * Copyright 2010 the original author or authors.
 *
 * 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.jayway.restassured.assertion

import static com.jayway.restassured.assertion.AssertionSupport.*

class JSONAssertion implements Assertion {
  String key;

  def Object getResult(Object object) {
    Object result = getAsJsonObject(object)
    return result;
  }

  def getAsJsonObject(object) {
    key = escapePath(key, minus(), attributeGetter(), integer());
    def result;
    if (key == "\$" || key == "") {
      result = object
    } else {
      def root = 'restAssuredJsonRootObject'
      try {
        def expr;
        if (key =~ /^\[\d+\].*/) {
          expr = "$root$key"
        } else {
          expr = "$root.$key"
        }
        result = Eval.me(root, object, expr)
      } catch (Exception e) {
        throw new IllegalArgumentException(e.getMessage().replace("startup failed:","Invalid JSON expression:").replace("$root.", generateWhitespace(root.length())));
      }
    }
    return result
  }

  def String description() {
    return "JSON path"
  }
}