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1
50
51 package com.lowagie.text.pdf;
52
53 import java.io.ByteArrayOutputStream  ;
54 import java.io.IOException ;
55 import java.io.OutputStream ;
56 import java.util.zip.DeflaterOutputStream ;
57
58 import com.lowagie.text.Document;
59 import com.lowagie.text.ExceptionConverter;
60
61 public class PRStream extends PdfStream {
62
63 protected PdfReader reader;
64 protected int offset;
65 protected int length;
66
67 protected int objNum = 0;
69 protected int objGen = 0;
70
71 public PRStream(PRStream stream, PdfDictionary newDic) {
72 reader = stream.reader;
73 offset = stream.offset;
74 length = stream.length;
75 compressed = stream.compressed;
76 streamBytes = stream.streamBytes;
77 bytes = stream.bytes;
78 objNum = stream.objNum;
79 objGen = stream.objGen;
80 if (newDic != null)
81 putAll(newDic);
82 else
83 hashMap.putAll(stream.hashMap);
84 }
85
86 public PRStream(PRStream stream, PdfDictionary newDic, PdfReader reader) {
87 this(stream, newDic);
88 this.reader = reader;
89 }
90
91 public PRStream(PdfReader reader, int offset) {
92 this.reader = reader;
93 this.offset = offset;
94 }
95
96 public PRStream(PdfReader reader, byte conts[]) {
97 this.reader = reader;
98 this.offset = -1;
99 if (Document.compress) {
100 try {
101 ByteArrayOutputStream stream = new ByteArrayOutputStream ();
102 DeflaterOutputStream zip = new DeflaterOutputStream (stream);
103 zip.write(conts);
104 zip.close();
105 bytes = stream.toByteArray();
106 }
107 catch (IOException ioe) {
108 throw new ExceptionConverter(ioe);
109 }
110 put(PdfName.FILTER, PdfName.FLATEDECODE);
111 }
112 else
113 bytes = conts;
114 setLength(bytes.length);
115 }
116
117
120 public void setData(byte[] data) {
121 remove(PdfName.FILTER);
122 this.offset = -1;
123 if (Document.compress) {
124 try {
125 ByteArrayOutputStream stream = new ByteArrayOutputStream ();
126 DeflaterOutputStream zip = new DeflaterOutputStream (stream);
127 zip.write(data);
128 zip.close();
129 bytes = stream.toByteArray();
130 }
131 catch (IOException ioe) {
132 throw new ExceptionConverter(ioe);
133 }
134 put(PdfName.FILTER, PdfName.FLATEDECODE);
135 }
136 else
137 bytes = data;
138 setLength(bytes.length);
139 }
140
141 public void setLength(int length) {
142 this.length = length;
143 put(PdfName.LENGTH, new PdfNumber(length));
144 }
145
146 public int getOffset() {
147 return offset;
148 }
149
150 public int getLength() {
151 return length;
152 }
153
154 public PdfReader getReader() {
155 return reader;
156 }
157
158 public byte[] getBytes() {
159 return bytes;
160 }
161
162 public void setObjNum(int objNum, int objGen) {
163 this.objNum = objNum;
164 this.objGen = objGen;
165 }
166
167 int getObjNum() {
168 return objNum;
169 }
170
171 int getObjGen() {
172 return objGen;
173 }
174
175 public void toPdf(PdfWriter writer, OutputStream os) throws IOException {
176 byte[] b = PdfReader.getStreamBytesRaw(this);
177 PdfEncryption crypto = null;
178 if (writer != null)
179 crypto = writer.getEncryption();
180 PdfObject objLen = get(PdfName.LENGTH);
181 int nn = b.length;
182 if (crypto != null)
183 nn = crypto.calculateStreamSize(nn);
184 put(PdfName.LENGTH, new PdfNumber(nn));
185 superToPdf(writer, os);
186 put(PdfName.LENGTH, objLen);
187 os.write(STARTSTREAM);
188 if (length > 0) {
189 if (crypto != null)
190 b = crypto.encryptByteArray(b);
191 os.write(b);
192 }
193 os.write(ENDSTREAM);
194 }
195 } |
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