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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.gateway.services.healthcheck.el.json;

import java.io.File;
import java.io.InputStream;
import java.net.URL;

import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Predicate;

/**
 * Utility class to {@link #evaluate} a jsonPath on the provided object.
 * Delegates evaluation to JsonPath.
 * Note {@link #evaluate} is used as {@code #jsonPath()} SpEL function.
 *
 * @author David BRASSELY (david at gravitee.io)
 * @author GraviteeSource Team
 */
public final class JsonPathUtils {

    private JsonPathUtils() {
    }

    public static  T evaluate(Object json, String jsonPath, Predicate... predicates) throws Exception {
        if (json instanceof String) {
            return JsonPath.read((String) json, jsonPath, predicates);
        }
        else if (json instanceof File) {
            return JsonPath.read((File) json, jsonPath, predicates);
        }
        else if (json instanceof URL) {
            return JsonPath.read((URL) json, jsonPath, predicates);
        }
        else if (json instanceof InputStream) {
            return JsonPath.read((InputStream) json, jsonPath, predicates);
        }
        else {
            return JsonPath.read(json, jsonPath, predicates);
        }
    }
}