package com.lowagie.text.pdf.collection;
import com.lowagie.text.pdf.PdfArray;
import com.lowagie.text.pdf.PdfBoolean;
import com.lowagie.text.pdf.PdfDictionary;
import com.lowagie.text.pdf.PdfName;
import com.lowagie.text.pdf.PdfObject;
public class PdfCollectionSort extends PdfDictionary {
/**
* Constructs a PDF Collection Sort Dictionary.
* @param key the key of the field that will be used to sort entries
*/
public PdfCollectionSort(String key) {
super(PdfName.COLLECTIONSORT);
put(PdfName.S, new PdfName(key));
}
/**
* Constructs a PDF Collection Sort Dictionary.
* @param keys the keys of the fields that will be used to sort entries
*/
public PdfCollectionSort(String[] keys) {
super(PdfName.COLLECTIONSORT);
PdfArray array = new PdfArray();
for (int i = 0; i < keys.length; i++) {
array.add(new PdfName(keys[i]));
}
put(PdfName.S, array);
}
/**
* Defines the sort order of the field (ascending or descending).
* @param ascending true is the default, use false for descending order
*/
public void setSortOrder(boolean ascending) {
PdfObject o = (PdfObject)get(PdfName.S);
if (o instanceof PdfName) {
put(PdfName.A, new PdfBoolean(ascending));
}
else {
throw new IllegalArgumentException("You have to define a boolean array for this collection sort dictionary.");
}
}
/**
* Defines the sort order of the field (ascending or descending).
* @param ascending an array with every element corresponding with a name of a field.
*/
public void setSortOrder(boolean[] ascending) {
PdfObject o = (PdfObject)get(PdfName.S);
if (o instanceof PdfArray) {
if (((PdfArray)o).size() != ascending.length) {
throw new IllegalArgumentException("The number of booleans in this array doesn't correspond with the number of fields.");
}
PdfArray array = new PdfArray();
for (int i = 0; i < ascending.length; i++) {
array.add(new PdfBoolean(ascending[i]));
}
put(PdfName.A, array);
}
else {
throw new IllegalArgumentException("You need a single boolean for this collection sort dictionary.");
}
}
}