org.apache.poi.hwpf.model.ListTables Maven / Gradle / Ivy
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contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to You under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
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http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
==================================================================== */
package org.apache.poi.hwpf.model;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import org.apache.poi.hwpf.model.io.HWPFOutputStream;
import org.apache.poi.util.LittleEndian;
import org.apache.poi.util.POILogFactory;
import org.apache.poi.util.POILogger;
/**
* @author Ryan Ackley
*/
public final class ListTables
{
private static final int LIST_DATA_SIZE = 28;
private static final int LIST_FORMAT_OVERRIDE_SIZE = 16;
private static POILogger log = POILogFactory.getLogger(ListTables.class);
ListMap _listMap = new ListMap();
ArrayList _overrideList = new ArrayList();
public ListTables()
{
}
public ListTables(byte[] tableStream, int lstOffset, int lfoOffset)
{
// get the list data
int length = LittleEndian.getShort(tableStream, lstOffset);
lstOffset += LittleEndian.SHORT_SIZE;
int levelOffset = lstOffset + (length * LIST_DATA_SIZE);
for (int x = 0; x < length; x++)
{
ListData lst = new ListData(tableStream, lstOffset);
_listMap.put(Integer.valueOf(lst.getLsid()), lst);
lstOffset += LIST_DATA_SIZE;
int num = lst.numLevels();
for (int y = 0; y < num; y++)
{
ListLevel lvl = new ListLevel(tableStream, levelOffset);
lst.setLevel(y, lvl);
levelOffset += lvl.getSizeInBytes();
}
}
// now get the list format overrides. The size is an int unlike the LST size
length = LittleEndian.getInt(tableStream, lfoOffset);
lfoOffset += LittleEndian.INT_SIZE;
int lfolvlOffset = lfoOffset + (LIST_FORMAT_OVERRIDE_SIZE * length);
for (int x = 0; x < length; x++)
{
ListFormatOverride lfo = new ListFormatOverride(tableStream, lfoOffset);
lfoOffset += LIST_FORMAT_OVERRIDE_SIZE;
int num = lfo.numOverrides();
for (int y = 0; y < num; y++)
{
while(tableStream[lfolvlOffset] == -1)
{
lfolvlOffset++;
}
ListFormatOverrideLevel lfolvl = new ListFormatOverrideLevel(tableStream, lfolvlOffset);
lfo.setOverride(y, lfolvl);
lfolvlOffset += lfolvl.getSizeInBytes();
}
_overrideList.add(lfo);
}
}
public int addList(ListData lst, ListFormatOverride override)
{
int lsid = lst.getLsid();
while (_listMap.get(Integer.valueOf(lsid)) != null)
{
lsid = lst.resetListID();
override.setLsid(lsid);
}
_listMap.put(Integer.valueOf(lsid), lst);
_overrideList.add(override);
return lsid;
}
public void writeListDataTo(HWPFOutputStream tableStream)
throws IOException
{
int listSize = _listMap.size();
// use this stream as a buffer for the levels since their size varies.
ByteArrayOutputStream levelBuf = new ByteArrayOutputStream();
byte[] shortHolder = new byte[2];
LittleEndian.putShort(shortHolder, (short)listSize);
tableStream.write(shortHolder);
for(Integer x : _listMap.sortedKeys()) {
ListData lst = _listMap.get(x);
tableStream.write(lst.toByteArray());
ListLevel[] lvls = lst.getLevels();
for (int y = 0; y < lvls.length; y++)
{
levelBuf.write(lvls[y].toByteArray());
}
}
tableStream.write(levelBuf.toByteArray());
}
public void writeListOverridesTo(HWPFOutputStream tableStream)
throws IOException
{
// use this stream as a buffer for the levels since their size varies.
ByteArrayOutputStream levelBuf = new ByteArrayOutputStream();
int size = _overrideList.size();
byte[] intHolder = new byte[4];
LittleEndian.putInt(intHolder, size);
tableStream.write(intHolder);
for (int x = 0; x < size; x++)
{
ListFormatOverride lfo = _overrideList.get(x);
tableStream.write(lfo.toByteArray());
ListFormatOverrideLevel[] lfolvls = lfo.getLevelOverrides();
for (int y = 0; y < lfolvls.length; y++)
{
levelBuf.write(lfolvls[y].toByteArray());
}
}
tableStream.write(levelBuf.toByteArray());
}
public ListFormatOverride getOverride(int lfoIndex)
{
return _overrideList.get(lfoIndex - 1);
}
public int getOverrideCount() {
return _overrideList.size();
}
public int getOverrideIndexFromListID(int lstid)
{
int returnVal = -1;
int size = _overrideList.size();
for (int x = 0; x < size; x++)
{
ListFormatOverride next = _overrideList.get(x);
if (next.getLsid() == lstid)
{
// 1-based index I think
returnVal = x+1;
break;
}
}
if (returnVal == -1)
{
throw new NoSuchElementException("No list found with the specified ID");
}
return returnVal;
}
public ListLevel getLevel(int listID, int level)
{
ListData lst = _listMap.get(Integer.valueOf(listID));
if(level < lst.numLevels()) {
ListLevel lvl = lst.getLevels()[level];
return lvl;
}
log.log(POILogger.WARN, "Requested level " + level + " which was greater than the maximum defined (" + lst.numLevels() + ")");
return null;
}
public ListData getListData(int listID)
{
return _listMap.get(Integer.valueOf(listID));
}
public boolean equals(Object obj)
{
if (obj == null)
{
return false;
}
ListTables tables = (ListTables)obj;
if (_listMap.size() == tables._listMap.size())
{
Iterator it = _listMap.keySet().iterator();
while (it.hasNext())
{
Integer key = it.next();
ListData lst1 = _listMap.get(key);
ListData lst2 = tables._listMap.get(key);
if (!lst1.equals(lst2))
{
return false;
}
}
int size = _overrideList.size();
if (size == tables._overrideList.size())
{
for (int x = 0; x < size; x++)
{
if (!_overrideList.get(x).equals(tables._overrideList.get(x)))
{
return false;
}
}
return true;
}
}
return false;
}
private static class ListMap implements Map {
private ArrayList keyList = new ArrayList();
private HashMap parent = new HashMap();
private ListMap() {}
public void clear() {
keyList.clear();
parent.clear();
}
public boolean containsKey(Object key) {
return parent.containsKey(key);
}
public boolean containsValue(Object value) {
return parent.containsValue(value);
}
public ListData get(Object key) {
return parent.get(key);
}
public boolean isEmpty() {
return parent.isEmpty();
}
public ListData put(Integer key, ListData value) {
keyList.add(key);
return parent.put(key, value);
}
public void putAll(Map map) {
for(Entry entry : map.entrySet()) {
put(entry.getKey(), entry.getValue());
}
}
public ListData remove(Object key) {
keyList.remove(key);
return parent.remove(key);
}
public int size() {
return parent.size();
}
public Set> entrySet() {
throw new IllegalStateException("Use sortedKeys() + get() instead");
}
public List sortedKeys() {
return Collections.unmodifiableList(keyList);
}
public Set keySet() {
throw new IllegalStateException("Use sortedKeys() instead");
}
public Collection values() {
ArrayList values = new ArrayList();
for(Integer key : keyList) {
values.add(parent.get(key));
}
return values;
}
}
}