core/org.eclipse.ptp.ui/src/org/eclipse/ptp/internal/ui/hover/SingleCharReader.java

/*******************************************************************************
 * Copyright (c) 2005 The Regents of the University of California. 
 * This material was produced under U.S. Government contract W-7405-ENG-36 
 * for Los Alamos National Laboratory, which is operated by the University 
 * of California for the U.S. Department of Energy. The U.S. Government has 
 * rights to use, reproduce, and distribute this software. NEITHER THE 
 * GOVERNMENT NOR THE UNIVERSITY MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR 
 * ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified 
 * to produce derivative works, such modified software should be clearly marked, 
 * so as not to confuse it with the version available from LANL.
 * 
 * Additionally, this program and the accompanying materials 
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * LA-CC 04-115
 *******************************************************************************/
package org.eclipse.ptp.internal.ui.hover;

import java.io.IOException;
import java.io.Reader;

/**
 * @author Clement chu
 * 
 */
/**
 * @author clement
 *
 */
public abstract class SingleCharReader extends Reader {
	/* (non-Javadoc)
	 * @see java.io.Reader#read()
	 */
	public abstract int read() throws IOException;
	/* (non-Javadoc)
	 * @see java.io.Reader#read(char[], int, int)
	 */
	public int read(char cbuf[], int off, int len) throws IOException {
		int end= off + len;
		for (int i= off; i < end; i++) {
			int ch= read();
			if (ch == -1) {
				if (i == off) {
					return -1;
				} else {
					return i - off;
				}
			}
			cbuf[i]= (char)ch;
		}
		return len;
	}		
    /* (non-Javadoc)
     * @see java.io.Reader#ready()
     */
    public boolean ready() throws IOException {
		return true;
	}
	/** Get string
	 * @return
	 * @throws IOException
	 */
	public String getString() throws IOException {
		StringBuffer buf= new StringBuffer();
		int ch;
		while ((ch= read()) != -1) {
			buf.append((char)ch);
		}
		return buf.toString();
	}
}