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.cds;
31:
32: import java.util.List;
33:
34: import de.intarsys.pdf.cos.COSArray;
35: import de.intarsys.pdf.cos.COSName;
36: import de.intarsys.pdf.cos.COSObject;
37:
38: /**
39: * Abstract superclass for implementing name and number trees.
40: */
41: abstract public class CDSTreeNode extends CDSBase {
42:
43: /** common names */
44: public static final COSName DK_Kids = COSName.constant("Kids"); //$NON-NLS-1$
45:
46: public static final COSName DK_Limits = COSName.constant("Limits"); //$NON-NLS-1$
47:
48: protected List kids;
49:
50: protected List entries;
51:
52: /**
53: * a two element array defining the smallest and the largest key contained
54: * in the receiver (recursively)
55: */
56: protected COSArray limits;
57:
58: public CDSTreeNode(COSObject object) {
59: super (object);
60: }
61:
62: public boolean isIntermediate() {
63: return cosGetDict().containsKey(DK_Kids);
64: }
65:
66: abstract public boolean isLeaf();
67:
68: }
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