001: /*
002: * Copyright (c) 2007, intarsys consulting GmbH
003: *
004: * Redistribution and use in source and binary forms, with or without
005: * modification, are permitted provided that the following conditions are met:
006: *
007: * - Redistributions of source code must retain the above copyright notice,
008: * this list of conditions and the following disclaimer.
009: *
010: * - Redistributions in binary form must reproduce the above copyright notice,
011: * this list of conditions and the following disclaimer in the documentation
012: * and/or other materials provided with the distribution.
013: *
014: * - Neither the name of intarsys nor the names of its contributors may be used
015: * to endorse or promote products derived from this software without specific
016: * prior written permission.
017: *
018: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
019: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
020: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
021: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
022: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
023: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
024: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
025: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
026: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
027: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
028: * POSSIBILITY OF SUCH DAMAGE.
029: */
030: package de.intarsys.pdf.st;
031:
032: import java.io.IOException;
033:
034: import de.intarsys.pdf.cos.COSObject;
035: import de.intarsys.pdf.cos.COSObjectKey;
036: import de.intarsys.pdf.crypt.ISystemSecurityHandler;
037: import de.intarsys.pdf.parser.COSLoadException;
038:
039: /**
040: * Represents an occupied object entry in a pdf xref table.
041: */
042: public class STXRefEntryOccupied extends STXRefEntry {
043: /** The offset of the entry */
044: private long offset;
045:
046: public STXRefEntryOccupied(COSObjectKey key, long offset) {
047: super (key);
048: this .offset = offset;
049: }
050:
051: /**
052: * @see de.intarsys.pdf.st.STXRefEntry#isFree()
053: */
054: public boolean isFree() {
055: return false;
056: }
057:
058: /*
059: * (non-Javadoc)
060: *
061: * @see de.intarsys.pdf.writer.XRefEntry#unlink()
062: */
063: protected void unlink() {
064: // do nothing
065: }
066:
067: /*
068: * (non-Javadoc)
069: *
070: * @see de.intarsys.pdf.storage.STXRefEntry#loadObject(de.intarsys.pdf.cos.COSIndirectObject)
071: */
072: public COSObject load(STDocument doc,
073: ISystemSecurityHandler securityHandler) throws IOException,
074: COSLoadException {
075: doc.getRandomAccess().seek(getOffset());
076: return doc.getParser().parseIndirectObject(
077: doc.getRandomAccess(), securityHandler);
078: }
079:
080: public STXRefEntryOccupied fill(int pos) {
081: setOffset(pos);
082: return this ;
083: }
084:
085: public long getOffset() {
086: return offset;
087: }
088:
089: public void setOffset(long offset) {
090: this .offset = offset;
091: }
092:
093: /*
094: * (non-Javadoc)
095: *
096: * @see de.intarsys.pdf.storage.STXRefEntry#getColumn1()
097: */
098: public long getColumn1() {
099: return getOffset();
100: }
101:
102: /*
103: * (non-Javadoc)
104: *
105: * @see de.intarsys.pdf.storage.STXRefEntry#getColumn2()
106: */
107: public int getColumn2() {
108: return getGenerationNumber();
109: }
110:
111: /*
112: * (non-Javadoc)
113: *
114: * @see de.intarsys.pdf.storage.STXRefEntry#accept(de.intarsys.pdf.storage.IXRefEntryVisitor)
115: */
116: public void accept(IXRefEntryVisitor visitor)
117: throws XRefEntryVisitorException {
118: visitor.visitFromOccupied(this );
119: }
120:
121: public STXRefEntry copy() {
122: return new STXRefEntryOccupied(getKey(), getOffset());
123: }
124: }
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