01: /*
02: * Copyright (c) 2007, intarsys consulting GmbH
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * - Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: *
10: * - Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * - Neither the name of intarsys nor the names of its contributors may be used
15: * to endorse or promote products derived from this software without specific
16: * prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28: * POSSIBILITY OF SUCH DAMAGE.
29: */
30: package de.intarsys.pdf.font;
31:
32: /**
33: * A selector for a character within a font (Character ID).
34: * <p>
35: * A character may be identified by different means (name, index, unicode..).
36: *
37: */
38: abstract public class CID {
39: /**
40: * The special CID for undefined glyphs.
41: */
42: public static final CID Notdef = new CIDSelectorCID(0);
43:
44: /**
45: *
46: */
47: protected CID() {
48: super ();
49: }
50:
51: /**
52: * The integer equivalent of the cid.
53: * <p>
54: * A CID must not be larger than the platform integer size.
55: *
56: * @return The integer equivalent of the cid.
57: */
58: abstract public int getValue();
59:
60: /**
61: * The font number referenced by this cid.
62: * <p>
63: * In PDF this is always 0.
64: *
65: * @return The font number referenced by this cid.
66: */
67: public int getFontNumber() {
68: return 0;
69: }
70:
71: /**
72: * The number of bytes this CID occupies.
73: *
74: * @return The number of bytes this CID occupies.
75: */
76: abstract public int getLength();
77: }
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