com.threecrowd.scrapi.ConfigReader.java Source code

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Here is the source code for com.threecrowd.scrapi.ConfigReader.java

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/*
 * Copyright 2012 David Hawthorne, 3Crowd/XDN, 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 com.threecrowd.scrapi;

import java.util.HashMap;

import com.google.gson.Gson;
import com.google.gson.JsonParseException;
import com.google.gson.JsonSyntaxException;
import org.jetbrains.annotations.NotNull;

import java.nio.charset.Charset;

import com.google.common.io.Files;

import java.io.*;

import com.threecrowd.scrapi.models.*;

//
// This class provides the methods for reading in a config file and returning the
// appropriate data structure for the config file read in.
//

class ConfigReader {
    static NodeConfig ReadNodeConfig(final String configuration_file) throws Exception {
        String file_contents = ReadFile(configuration_file);

        if (file_contents.isEmpty()) {
            throw new Exception("config file is empty");
        }

        Gson gson = new Gson();
        return gson.fromJson(file_contents, NodeConfig.class);
    }

    @SuppressWarnings({ "AssignmentToNull" })
    static String ReadFile(@NotNull final String filename) throws Exception {

        return Files.toString(new File(filename), Charset.defaultCharset());
    }
}