2 * Copyright (C) 2001, 2002 The Mir-coders group
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4 * This file is part of Mir.
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6 * Mir is free software; you can redistribute it and/or modify
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7 * it under the terms of the GNU General Public License as published by
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8 * the Free Software Foundation; either version 2 of the License, or
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9 * (at your option) any later version.
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11 * Mir is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 * GNU General Public License for more details.
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16 * You should have received a copy of the GNU General Public License
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17 * along with Mir; if not, write to the Free Software
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18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 * In addition, as a special exception, The Mir-coders gives permission to link
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21 * the code of this program with any library licensed under the Apache Software License,
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22 * The Sun (tm) Java Advanced Imaging library (JAI), The Sun JIMI library
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23 * (or with modified versions of the above that use the same license as the above),
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24 * and distribute linked combinations including the two. You must obey the
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25 * GNU General Public License in all respects for all of the code used other than
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26 * the above mentioned libraries. If you modify this file, you may extend this
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27 * exception to your version of the file, but you are not obligated to do so.
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28 * If you do not wish to do so, delete this exception statement from your version.
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30 package mir.entity.adapter;
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32 import java.util.AbstractList;
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33 import java.util.List;
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34 import java.util.Vector;
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36 import mir.entity.Entity;
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37 import mir.entity.EntityBrowser;
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39 public class EntityListAdapter extends AbstractList {
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41 private int maximumLength;
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42 private EntityBrowser browser;
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43 private EntityAdapterModel model;
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44 private String definition;
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45 private boolean exhausted = false;
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46 private boolean skipped = false;
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50 protected EntityListAdapter(EntityAdapterModel aModel, String aDefinition, EntityBrowser aBrowser, int aSkip, int aMaximumLength) {
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52 definition = aDefinition;
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55 maximumLength = aMaximumLength;
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56 cache = new Vector();
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59 protected EntityListAdapter(EntityAdapterModel aModel, String aDefinition, EntityBrowser aBrowser, int aMaximumLength) {
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60 this(aModel, aDefinition, aBrowser, 0, aMaximumLength);
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63 protected EntityListAdapter(EntityAdapterModel aModel, String aDefinition, EntityBrowser aBrowser) {
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64 this(aModel, aDefinition, aBrowser, 0, -1);
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67 private void skip() {
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72 for(i=0; i<skip; i++)
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73 if (browser.hasNext())
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78 catch (Throwable t) {
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79 throw new RuntimeException(t.getMessage());
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83 private void fetchNext() {
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86 if (browser.hasNext())
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87 cache.add(model.makeEntityAdapter(definition, (Entity) browser.next()));
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89 exhausted = !browser.hasNext() || (maximumLength>0 && cache.size()>=maximumLength) ;
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92 catch (Throwable t) {
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93 throw new RuntimeException(t.getMessage());
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98 private void exhaust() {
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105 private void fetchUntil(int anIndex) {
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108 while (!exhausted && anIndex>=cache.size())
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112 public int size() {
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115 return cache.size();
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118 public Object get(int anIndex) {
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119 fetchUntil(anIndex);
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120 return cache.get(anIndex);
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