Example usage for java.io Reader read

Introduction

In this page you can find the example usage for java.io Reader read.

Prototype

public abstract int read(char cbuf[], int off, int len) throws IOException;

Source Link

Document

Reads characters into a portion of an array.

Usage

From source file:it.doqui.index.ecmengine.business.personalization.encryption.content.DecryptingContentReaderDecorator.java

public String getContentString(int length) throws ContentIOException {
    logger.debug("[DecryptingContentReaderDecorator::getContentString] BEGIN");

    Reader localReader = null;
    try {//from   w w  w  .ja va2 s. com
        if (length < 0 || length > Integer.MAX_VALUE) {
            throw new IllegalArgumentException("Character count must be positive and within range");
        }

        // just create buffer of the required size
        char[] buffer = new char[length];

        String encoding = getEncoding();

        // create a reader from the input stream
        localReader = (encoding == null) ? new InputStreamReader(getContentInputStream())
                : new InputStreamReader(getContentInputStream(), getEncoding());

        // read it all, if possible
        int count = localReader.read(buffer, 0, length);

        // there may have been fewer characters - create a new string as the result
        return ((count != -1) ? new String(buffer, 0, count) : "");
    } catch (IOException e) {
        logger.error(
                "[DecryptingContentReaderDecorator::getContentString] I/O Error reading from: " + localReader,
                e);
        throw new ContentIOException(
                "Failed to copy content to string: \n" + "   accessor: " + this + "\n" + "   length: " + length,
                e);
    } finally {
        if (localReader != null) {
            try {
                localReader.close();
            } catch (Throwable e) {
                logger.warn("[DecryptingContentReaderDecorator::getContentString] Error closing local reader: "
                        + localReader, e);
            }
        }
        logger.debug("[DecryptingContentReaderDecorator::getContentString] END");
    }
}