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package cz.frantovo.rozsireneAtributy;
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import java.io.File;
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import java.io.IOException;
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import java.nio.ByteBuffer;
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import java.nio.file.Path;
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import java.nio.file.attribute.UserDefinedFileAttributeView;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import javax.swing.event.TableModelEvent;
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import javax.swing.event.TableModelListener;
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import javax.swing.table.TableModel;
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/**
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*
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* @author fiki
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*/
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public class Model implements TableModel {
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private static final Logger log = Logger.getLogger(Model.class.getSimpleName());
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private String[] sloupečky = {"Název", "Hodnota"};
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private HashSet<TableModelListener> posluchače = new HashSet<TableModelListener>();
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private UserDefinedFileAttributeView souborovySystem;
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private ArrayList<Atribut> atributy = new ArrayList<Atribut>();
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public Model(File soubor) throws IOException {
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Path cesta = soubor.toPath();
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souborovySystem = cesta.getFileAttributeView(UserDefinedFileAttributeView.class);
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načtiAtributy();
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}
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public int getRowCount() {
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return atributy.size();
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}
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public int getColumnCount() {
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return sloupečky.length;
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}
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public String getColumnName(int n) {
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return sloupečky[n];
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}
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public Class<?> getColumnClass(int n) {
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return String.class;
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}
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public boolean isCellEditable(int m, int n) {
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return true;
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}
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public Object getValueAt(int m, int n) {
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if (n == 0) {
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return atributy.get(m).getKlic();
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} else if (n == 1) {
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return atributy.get(m).getHodnota();
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} else {
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return null;
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}
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}
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public void setValueAt(Object value, int m, int n) {
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Atribut a = atributy.get(m);
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try {
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if (n == 0) {
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/** Měníme klíč – název atributu */
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String novýKlíč = String.valueOf(value.toString());
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if (!novýKlíč.equals(a.getKlic())) {
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if (a.getKlic() != null) {
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souborovySystem.delete(a.getKlic());
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}
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a.setKlic(novýKlíč);
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if (a.getHodnotaBajty() != null) {
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souborovySystem.write(a.getKlic(), a.getHodnotaBajty());
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}
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}
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} else if (n == 1) {
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/** Měníme hodnotu atributu */
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a.setHodnota(String.valueOf(value.toString()));
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souborovySystem.write(a.getKlic(), a.getHodnotaBajty());
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}
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} catch (IOException e) {
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log.log(Level.SEVERE, "Selhalo ukládání atributu na souborový systém", e);
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}
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}
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public void addTableModelListener(TableModelListener l) {
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posluchače.add(l);
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}
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public void removeTableModelListener(TableModelListener l) {
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posluchače.remove(l);
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}
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/**
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* @param m číslo řádku
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* @return atribut, který se na něm nachází
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*/
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public Atribut getAtribut(int m) {
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return atributy.get(m);
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}
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public void přidejAtribut(Atribut a) {
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atributy.add(a);
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upozorniPosluchače();
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}
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public void odeberAtribut(Atribut a) throws IOException {
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atributy.remove(a);
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souborovySystem.delete(a.getKlic());
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upozorniPosluchače();
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}
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public final void načtiAtributy() throws IOException {
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List<String> jménaAtributů = souborovySystem.list();
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atributy.clear();
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for (String jménoAtributu : jménaAtributů) {
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ByteBuffer hodnotaAtributu = ByteBuffer.allocate(souborovySystem.size(jménoAtributu));
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souborovySystem.read(jménoAtributu, hodnotaAtributu);
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atributy.add(new Atribut(jménoAtributu, hodnotaAtributu));
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}
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upozorniPosluchače();
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}
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private void upozorniPosluchače() {
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for (TableModelListener p : posluchače) {
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p.tableChanged(new TableModelEvent(this));
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}
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}
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}
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