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1
51
52 package org.ozoneDB.xml.util;
53
54 import java.io.OutputStream  ;
55 import java.io.IOException ;
56 import java.io.UTFDataFormatException ;
57 import java.io.Serializable ;
58
59 import java.util.HashMap ;
60
61
65 final class CompiledXMLOutputStream extends OutputStream implements Serializable {
66
67 private static final boolean COMPRESS = true;
68
69 private final OutputStream out;
70 private final HashMap map = new HashMap ();
71 private int indexCount = 0;
72
73
74 public CompiledXMLOutputStream( OutputStream out ) throws IOException {
75 this.out = out;
76 }
77
78
79 public final void writeEvent( int event ) throws IOException {
80 this.out.write( event );
81 }
82
83
84 public final void writeAttributes( int attributes ) throws IOException {
85 OutputStream out = this.out;
86 out.write( attributes >>> 8 & 0xFF );
87 out.write( attributes & 0xFF );
88 }
90
91
92 public final void writeString( String str ) throws IOException {
93 Integer index;
94
95 if (CompiledXMLOutputStream.COMPRESS) {
96 index = (Integer )map.get( str );
97 } else {
98 index = null;
99 }
100
101 if (index == null) {
102 int length = str.length();
103 if (CompiledXMLOutputStream.COMPRESS) {
104 map.put(str, new Integer (indexCount++));
105 }
107 if (length > 2 << 15) {
108 throw new IOException ( "String cannot be bigger than 32K" );
109 }
110 this.writeChars( str.toCharArray(), 0, length );
111 } else {
112 int i = index.intValue();
113 this.out.write( i >>> 8 & 0xFF | 0x80 );
114 this.out.write( i & 0xFF );
115 }
116 }
117
118
119 public final void writeChars( char[] ch, int start, int length ) throws IOException {
120 int utflen = 0;
121 int c;
122 int count = 0;
123 int end = start + length;
124
125
126 for (int i = start; i < end; i++) {
127 c = ch[i];
128 utflen += (c >= 0x0001 && c <= 0x007F) ? 1 : (c > 0x07FF) ? 3 : 2;
129 }
130
131 if (utflen > 65535) {
132 throw new UTFDataFormatException ();
133 }
134
135 byte[] bytearr = new byte[utflen + 2];
136 bytearr[count++] = (byte)(utflen >>> 8 & 0xFF);
137 bytearr[count++] = (byte)(utflen >>> 0 & 0xFF);
138 for (int i = start; i < end; i++) {
139 c = ch[i];
140 if (c >= 0x0001 && c <= 0x007F) {
141 bytearr[count++] = (byte)c;
142 } else if (c > 0x07FF) {
143 bytearr[count++] = (byte)(0xE0 | c >> 12 & 0x0F);
144 bytearr[count++] = (byte)(0x80 | c >> 6 & 0x3F);
145 bytearr[count++] = (byte)(0x80 | c >> 0 & 0x3F);
146 } else {
147 bytearr[count++] = (byte)(0xC0 | c >> 6 & 0x1F);
148 bytearr[count++] = (byte)(0x80 | c >> 0 & 0x3F);
149 }
150 }
151
152 this.out.write(bytearr, 0, count);
153 }
154
155
156 public final void write(int c) throws IOException {
157 this.out.write(c);
158 }
159 }
160 |
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