/*
 * Copyright 2018 Red Hat, Inc. and/or its affiliates.
 *
 * 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.jbpm.process.workitem.transform;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class FileTransformer {

    private static final Logger logger = LoggerFactory.getLogger(FileTransformer.class);

    // All transform methods must be static and must contain the @Transformer annotation
    @Transformer
    public static String fileToString(File file) {
        try {
            String fileString = "";
            BufferedReader reader = new BufferedReader(new FileReader(file));
            String line = "";
            while ((line = reader.readLine()) != null) {
                fileString += line;
            }
            return fileString;
        } catch (Exception e) {
            logger.error("Failed to read file {}", file.getName());
        }
        return null;
    }

    @Transformer
    public static BufferedReader fileToBufferedReader(File file) {
        try {
            BufferedReader reader = new BufferedReader(new FileReader(file));
            return reader;
        } catch (Exception e) {
            logger.error("Failed to read file {}", file.getName());
        }
        return null;
    }
}
