Examples with ByteSource com.google.common.io.ByteSource used on opensource projects

Example 66 with ByteSource

use of com.google.common.io.ByteSource in project dhis2-core by dhis2.

the class JCloudsFileResourceContentStore method getFileResourceContent.

// -------------------------------------------------------------------------
// FileResourceContentStore implementation
// -------------------------------------------------------------------------
@Override
public ByteSource getFileResourceContent(String key) {
    final Blob blob = getBlob(key);
    if (blob == null) {
        return null;
    }
    final ByteSource byteSource = new ByteSource() {

        @Override
        public InputStream openStream() {
            try {
                return blob.getPayload().openStream();
            } catch (IOException e) {
                return new NullInputStream(0);
            }
        }
    };
    boolean isEmptyOrFailed;
    try {
        isEmptyOrFailed = byteSource.isEmpty();
    } catch (IOException e) {
        isEmptyOrFailed = true;
    }
    return isEmptyOrFailed ? null : byteSource;
}