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iText, a free Java-PDF library
/*
* Copyright 2005 by Michael Niedermair.
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2005 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2000-2005 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf.events;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;
import com.lowagie.text.Chunk;
import com.lowagie.text.Document;
import com.lowagie.text.Rectangle;
import com.lowagie.text.pdf.PdfPageEventHelper;
import com.lowagie.text.pdf.PdfWriter;
/**
* Class for an index.
*
* @author Michael Niedermair
*/
public class IndexEvents extends PdfPageEventHelper {
/**
* keeps the indextag with the pagenumber
*/
private Map indextag = new TreeMap();
/**
* All the text that is passed to this event, gets registered in the indexentry.
*
* @see com.lowagie.text.pdf.PdfPageEventHelper#onGenericTag(
* com.lowagie.text.pdf.PdfWriter, com.lowagie.text.Document,
* com.lowagie.text.Rectangle, java.lang.String)
*/
public void onGenericTag(PdfWriter writer, Document document,
Rectangle rect, String text) {
indextag.put(text, new Integer(writer.getPageNumber()));
}
// --------------------------------------------------------------------
/**
* indexcounter
*/
private long indexcounter = 0;
/**
* the list for the index entry
*/
private List indexentry = new ArrayList();
/**
* Create an index entry.
*
* @param text The text for the Chunk.
* @param in1 The first level.
* @param in2 The second level.
* @param in3 The third level.
* @return Returns the Chunk.
*/
public Chunk create(final String text, final String in1, final String in2,
final String in3) {
Chunk chunk = new Chunk(text);
String tag = "idx_" + (indexcounter++);
chunk.setGenericTag(tag);
chunk.setLocalDestination(tag);
Entry entry = new Entry(in1, in2, in3, tag);
indexentry.add(entry);
return chunk;
}
/**
* Create an index entry.
*
* @param text The text for the Chunk.
* @param in1 The first level.
* @return Returns the Chunk.
*/
public Chunk create(final String text, final String in1) {
return create(text, in1, "", "");
}
/**
* Create an index entry.
*
* @param text The text for the Chunk.
* @param in1 The first level.
* @param in2 The second level.
* @return Returns the Chunk.
*/
public Chunk create(final String text, final String in1, final String in2) {
return create(text, in1, in2, "");
}
/**
* Create an index entry.
*
* @param text The text.
* @param in1 The first level.
* @param in2 The second level.
* @param in3 The third level.
*/
public void create(final Chunk text, final String in1, final String in2,
final String in3) {
String tag = "idx_" + (indexcounter++);
text.setGenericTag(tag);
text.setLocalDestination(tag);
Entry entry = new Entry(in1, in2, in3, tag);
indexentry.add(entry);
}
/**
* Create an index entry.
*
* @param text The text.
* @param in1 The first level.
*/
public void create(final Chunk text, final String in1) {
create(text, in1, "", "");
}
/**
* Create an index entry.
*
* @param text The text.
* @param in1 The first level.
* @param in2 The second level.
*/
public void create(final Chunk text, final String in1, final String in2) {
create(text, in1, in2, "");
}
/**
* Comparator for sorting the index
*/
private Comparator comparator = new Comparator() {
public int compare(Object arg0, Object arg1) {
Entry en1 = (Entry) arg0;
Entry en2 = (Entry) arg1;
int rt = 0;
if (en1.getIn1() != null && en2.getIn1() != null) {
if ((rt = en1.getIn1().compareToIgnoreCase(en2.getIn1())) == 0) {
// in1 equals
if (en1.getIn2() != null && en2.getIn2() != null) {
if ((rt = en1.getIn2()
.compareToIgnoreCase(en2.getIn2())) == 0) {
// in2 equals
if (en1.getIn3() != null && en2.getIn3() != null) {
rt = en1.getIn3().compareToIgnoreCase(
en2.getIn3());
}
}
}
}
}
return rt;
}
};
/**
* Set the comparator.
* @param aComparator The comparator to set.
*/
public void setComparator(Comparator aComparator) {
comparator = aComparator;
}
/**
* Returns the sorted list with the entries and the collected page numbers.
* @return Returns the sorted list with the entries and the collected page numbers.
*/
public List getSortedEntries() {
Map grouped = new HashMap();
for (int i = 0; i < indexentry.size(); i++) {
Entry e = (Entry) indexentry.get(i);
String key = e.getKey();
Entry master = (Entry) grouped.get(key);
if (master != null) {
master.addPageNumberAndTag(e.getPageNumber(), e.getTag());
} else {
e.addPageNumberAndTag(e.getPageNumber(), e.getTag());
grouped.put(key, e);
}
}
// copy to a list and sort it
List sorted = new ArrayList(grouped.values());
Collections.sort(sorted, comparator);
return sorted;
}
// --------------------------------------------------------------------
/**
* Class for an index entry.
*
* In the first step, only in1, in2,in3 and tag are used.
* After the collections of the index entries, pagenumbers are used.
*
*/
public class Entry {
/**
* first level
*/
private String in1;
/**
* second level
*/
private String in2;
/**
* third level
*/
private String in3;
/**
* the tag
*/
private String tag;
/**
* the list of all page numbers.
*/
private List pagenumbers = new ArrayList();
/**
* the list of all tags.
*/
private List tags = new ArrayList();
/**
* Create a new object.
* @param aIn1 The first level.
* @param aIn2 The second level.
* @param aIn3 The third level.
* @param aTag The tag.
*/
public Entry(final String aIn1, final String aIn2, final String aIn3,
final String aTag) {
in1 = aIn1;
in2 = aIn2;
in3 = aIn3;
tag = aTag;
}
/**
* Returns the in1.
* @return Returns the in1.
*/
public String getIn1() {
return in1;
}
/**
* Returns the in2.
* @return Returns the in2.
*/
public String getIn2() {
return in2;
}
/**
* Returns the in3.
* @return Returns the in3.
*/
public String getIn3() {
return in3;
}
/**
* Returns the tag.
* @return Returns the tag.
*/
public String getTag() {
return tag;
}
/**
* Returns the pagenumber for this entry.
* @return Returns the pagenumber for this entry.
*/
public int getPageNumber() {
int rt = -1;
Integer i = (Integer) indextag.get(tag);
if (i != null) {
rt = i.intValue();
}
return rt;
}
/**
* Add a pagenumber.
* @param number The page number.
* @param tag
*/
public void addPageNumberAndTag(final int number, final String tag) {
pagenumbers.add(new Integer(number));
tags.add(tag);
}
/**
* Returns the key for the map-entry.
* @return Returns the key for the map-entry.
*/
public String getKey() {
return in1 + "!" + in2 + "!" + in3;
}
/**
* Returns the pagenumbers.
* @return Returns the pagenumbers.
*/
public List getPagenumbers() {
return pagenumbers;
}
/**
* Returns the tags.
* @return Returns the tags.
*/
public List getTags() {
return tags;
}
/**
* print the entry (only for test)
* @return the toString implementation of the entry
*/
public String toString() {
StringBuffer buf = new StringBuffer();
buf.append(in1).append(' ');
buf.append(in2).append(' ');
buf.append(in3).append(' ');
for (int i = 0; i < pagenumbers.size(); i++) {
buf.append(pagenumbers.get(i)).append(' ');
}
return buf.toString();
}
}
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