001package votorola.g.io; // Copyright 2006, 2009, Michael Allan.  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Votorola Software"), to deal in the Votorola Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicence, and/or sell copies of the Votorola Software, and to permit persons to whom the Votorola Software is furnished to do so, subject to the following conditions: The preceding copyright notice and this permission notice shall be included in all copies or substantial portions of the Votorola Software. THE VOTOROLA SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE VOTOROLA SOFTWARE OR THE USE OR OTHER DEALINGS IN THE VOTOROLA SOFTWARE.
002
003import java.io.*;
004import votorola.g.lang.*;
005
006
007/** Reader utilities.
008  */
009public @ThreadSafe final class ReaderX
010{
011
012    private ReaderX() {}
013
014
015
016    /** Appends the entire input stream to the specified appendable.
017      *
018      *     @return the same appendable
019      */
020    public static Appendable appendTo( final Appendable a, final Reader in ) throws IOException
021    {
022        for( ;; ) { int c = in.read(); if( c == -1 ) break; a.append( (char)c ); }
023        return a;
024    }
025
026
027
028    /** Same as in.close() but throws only runtime exceptions.
029      *
030      *     @throws RuntimeException if IOException occurs
031      */
032    public static void runClose( final Reader in )
033    {
034        try{ in.close(); }
035        catch( IOException x ) { throw new RuntimeException( x ); }
036    }
037
038
039
040    /** Same as in.close() but throws no exceptions.
041      *
042      *     @return null if in closed normally; otherwise the IOException that occured
043      */
044    public static IOException tryClose( final Reader in )
045    {
046        try
047        {
048            in.close();
049            return null;
050        }
051        catch( IOException x ) { return x; }
052    }
053
054
055
056}