org.dd4t.core.util.IOUtils.java Source code

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Here is the source code for org.dd4t.core.util.IOUtils.java

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/**  
 *  Copyright 2011 Capgemini & SDL
 * 
 *    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.dd4t.core.util;

import java.io.BufferedReader;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;

import org.springframework.core.io.FileSystemResource;

public class IOUtils {
    public static String convertStreamToString(InputStream is) throws IOException {
        /*
         * To convert the InputStream to String we use the
         * BufferedReader.readLine() method. We iterate until the BufferedReader
         * return null which means there's no more data to read. Each line will
         * appended to a StringBuilder and returned as String.
         */
        if (is != null) {
            StringBuilder sb = new StringBuilder();
            String line;
            try {
                BufferedReader reader = new BufferedReader(new InputStreamReader(is, "UTF-8"));
                while ((line = reader.readLine()) != null) {
                    sb.append(line).append("\n");
                }
            } finally {
                is.close();
            }
            return sb.toString();
        } else {
            return "";
        }
    }

    public static String convertFileToString(String filePath) {
        FileSystemResource resource = new FileSystemResource(filePath);
        File file = resource.getFile();
        byte[] buffer = new byte[(int) file.length()];
        try {
            resource.getInputStream().read(buffer);
            resource.getInputStream().close();
            return new String(buffer);
        } catch (IOException e) {
            return null;
        }
    }
}