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iText, a free Java-PDF library
/*
* $Id: IndexEvents.java 5075 2012-02-27 16:36:18Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2012 1T3XT BVBA
* Authors: Bruno Lowagie, Paulo Soares, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program 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 Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.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.itextpdf.text.Chunk;
import com.itextpdf.text.Document;
import com.itextpdf.text.Rectangle;
import com.itextpdf.text.pdf.PdfPageEventHelper;
import com.itextpdf.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.itextpdf.text.pdf.PdfPageEventHelper#onGenericTag(
* com.itextpdf.text.pdf.PdfWriter, com.itextpdf.text.Document,
* com.itextpdf.text.Rectangle, java.lang.String)
*/
@Override
public void onGenericTag(PdfWriter writer, Document document,
Rectangle rect, String text) {
indextag.put(text, Integer.valueOf(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(Entry en1, Entry en2) {
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 = indexentry.get(i);
String key = e.getKey();
Entry master = 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 = 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(Integer.valueOf(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
*/
@Override
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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