Java InputStream to String loadTextFile(InputStream stream, String encoding, int maxSize, boolean finish)

Description

Get the contents of the stream to a .self file and parse it.

License

Open Source License

Declaration

public static String loadTextFile(InputStream stream, String encoding, int maxSize, boolean finish) 

Method Source Code

//package com.java2s;
/******************************************************************************
 *
 *  Copyright 2014 Paphus Solutions Inc.
 *
 *  Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/legal/epl-v10.html
 *
 *  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./*from   ww  w  . j  ava  2s .c o m*/
 *
 ******************************************************************************/

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;

public class Main {
    /**
     * Get the contents of the stream to a .self file and parse it.
     */
    public static String loadTextFile(InputStream stream, String encoding, int maxSize, boolean finish) {
        if (encoding.trim().isEmpty()) {
            encoding = "UTF-8";
        }

        // FEFF because this is the Unicode char represented by the UTF-8 byte order mark (EF BB BF).
        String UTF8_BOM = "\uFEFF";

        StringWriter writer = new StringWriter();
        InputStreamReader reader = null;
        try {
            reader = new InputStreamReader(stream, encoding);
            int size = 0;
            int next = reader.read();
            boolean first = true;
            while (next >= 0) {
                if (first && next == UTF8_BOM.charAt(0)) {
                    // skip
                } else {
                    writer.write(next);
                }
                next = reader.read();
                if (size > maxSize) {
                    throw new RuntimeException(
                            "File size limit exceeded: " + size + " > " + maxSize + " token: " + next);
                }
                size++;
            }
        } catch (IOException exception) {
            throw new RuntimeException("IO Error: " + exception.getMessage(), exception);
        } finally {
            if (reader != null && finish) {
                try {
                    reader.close();
                } catch (IOException ignore) {
                }
            }
            if (stream != null && finish) {
                try {
                    stream.close();
                } catch (IOException ignore) {
                }
            }
        }
        return writer.toString();
    }
}

Related

1. inputStreamToStringBuffer(InputStream stream)
2. inputStreamToStringBuilder(final InputStream inputStream, final String charset)
3. inputStreamToStringBuilder(InputStream in, int minimumCapacity)
4. inputStreamToText(InputStream inputStream)
5. loadText(InputStream in)
6. valueOf(InputStream is)