1 /*
   2  * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package com.sun.xml.internal.bind.v2.runtime.unmarshaller;
  27 
  28 import java.io.IOException;
  29 
  30 import com.sun.xml.internal.bind.v2.runtime.output.Pcdata;
  31 import com.sun.xml.internal.bind.v2.runtime.output.UTF8XmlOutput;
  32 
  33 /**
  34  * Typed {@link CharSequence} for int[].
  35  *
  36  * <p>
  37  * Fed to unmarshaller when the 'text' data is actually
  38  * a virtual image of int array.
  39  *
  40  * <p>
  41  * This class holds int[] as a triplet of (data,start,len)
  42  * where 'start' and 'len' represents the start position of the
  43  * data and the length.
  44  *
  45  * @author Kohsuke Kawaguchi
  46  */
  47 public final class IntArrayData extends Pcdata {
  48 
  49     private int[] data;
  50     private int start;
  51     private int len;
  52 
  53     /**
  54      * String representation of the data. Lazily computed.
  55      */
  56     private StringBuilder literal;
  57 
  58 
  59     public IntArrayData(int[] data, int start, int len) {
  60         set(data, start, len);
  61     }
  62 
  63     public IntArrayData() {
  64     }
  65 
  66     /**
  67      * Sets the int[] data to this object.
  68      *
  69      * <p>
  70      * This method doesn't make a copy for a performance reason.
  71      * The caller is still free to modify the array it passed to this method,
  72      * but he should do so with a care. The unmarshalling code isn't expecting
  73      * the value to be changed while it's being routed.
  74      */
  75     public void set(int[] data, int start, int len) {
  76         this.data = data;
  77         this.start = start;
  78         this.len = len;
  79         this.literal = null;
  80     }
  81 
  82     public int length() {
  83         return getLiteral().length();
  84     }
  85 
  86     public char charAt(int index) {
  87         return getLiteral().charAt(index);
  88     }
  89 
  90     public CharSequence subSequence(int start, int end) {
  91         return getLiteral().subSequence(start,end);
  92     }
  93 
  94     /**
  95      * Computes the literal form from the data.
  96      */
  97     private StringBuilder getLiteral() {
  98         if(literal!=null)   return literal;
  99 
 100         literal = new StringBuilder();
 101         int p = start;
 102         for( int i=len; i>0; i-- ) {
 103             if(literal.length()>0)  literal.append(' ');
 104             literal.append(data[p++]);
 105         }
 106 
 107         return literal;
 108     }
 109 
 110     public String toString() {
 111         return literal.toString();
 112     }
 113 
 114     public void writeTo(UTF8XmlOutput output) throws IOException {
 115         int p = start;
 116         for( int i=len; i>0; i-- ) {
 117             if(i!=len)
 118                 output.write(' ');
 119             output.text(data[p++]);
 120         }
 121     }
 122 }