SingleCharReader


1   /*******************************************************************************
2    * Copyright (c) 2000, 2005 IBM Corporation and others.
3    * All rights reserved. This program and the accompanying materials
4    * are made available under the terms of the Eclipse Public License v1.0
5    * which accompanies this distribution, and is available at
6    * http://www.eclipse.org/legal/epl-v10.html
7    * 
8    * Contributors:
9    *     IBM Corporation - initial API and implementation
10   *******************************************************************************/
11  package org.eclipse.ant.internal.ui.editor.derived;
12  
13  
14  import java.io.IOException  ;
15  import java.io.Reader  ;
16  
17  /**
18   * @see org.eclipse.jdt.internal.corext.javadoc.SingleCharReader
19   */
20  public abstract class SingleCharReader extends Reader   {
21      
22      /**
23       * @see Reader#read()
24       */
25      public abstract int read() throws IOException  ;
26  
27      /**
28       * @see Reader#read(char[],int,int)
29       */
30      public int read(char cbuf[], int off, int len) throws IOException   {
31          int end= off + len;
32          for (int i= off; i < end; i++) {
33              int ch= read();
34              if (ch == -1) {
35                  if (i == off) {
36                      return -1;
37                  } 
38                  return i - off;
39              }
40              cbuf[i]= (char)ch;
41          }
42          return len;
43      }       
44      
45      /**
46       * @see Reader#ready()
47       */     
48      public boolean ready() throws IOException   {
49          return true;
50      }
51      
52      /**
53       * Gets the content as a String
54       */
55      public String   getString() throws IOException   {
56          StringBuffer   buf= new StringBuffer  ();
57          int ch;
58          while ((ch= read()) != -1) {
59              buf.append((char)ch);
60          }
61          return buf.toString();
62      }
63  }
64
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