01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: /* $Id: KnuthPossPosIter.java 524062 2007-03-30 12:25:19Z vhennebert $ */
19:
20: package org.apache.fop.layoutmgr;
21:
22: import java.util.List;
23:
24: public class KnuthPossPosIter extends PositionIterator {
25:
26: private int iterCount;
27:
28: /**
29: * Main constructor
30: * @param elementList List of Knuth elements
31: * @param startPos starting position, inclusive
32: * @param endPos ending position, exclusive
33: */
34: public KnuthPossPosIter(List elementList, int startPos, int endPos) {
35: super (elementList.listIterator(startPos));
36: iterCount = endPos - startPos;
37: }
38:
39: /**
40: * Auxiliary constructor
41: * @param elementList List of Knuth elements
42: */
43: public KnuthPossPosIter(List elementList) {
44: this (elementList, 0, elementList.size());
45: }
46:
47: // Check position < endPos
48:
49: /**
50: * @see org.apache.fop.layoutmgr.PositionIterator#checkNext()
51: */
52: protected boolean checkNext() {
53: if (iterCount > 0) {
54: return super .checkNext();
55: } else {
56: endIter();
57: return false;
58: }
59: }
60:
61: /**
62: * @see java.util.Iterator#next()
63: */
64: public Object next() {
65: --iterCount;
66: return super .next();
67: }
68:
69: public ListElement getKE() {
70: return (ListElement) peekNext();
71: }
72:
73: protected LayoutManager getLM(Object nextObj) {
74: return ((ListElement) nextObj).getLayoutManager();
75: }
76:
77: protected Position getPos(Object nextObj) {
78: return ((ListElement) nextObj).getPosition();
79: }
80: }
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