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package org.simpleframework.http.socket.table;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
public class WebSocketTableRow {
private final Map<String, WebSocketTableCell> cells;
private final WebSocketValueEncoder encoder;
private final WebSocketTableSchema schema;
private final int index;
public WebSocketTableRow(WebSocketTableSchema schema, int index) {
this.cells = new ConcurrentHashMap<String, WebSocketTableCell>();
this.encoder = new WebSocketValueEncoder();
this.index = index;
this.schema = schema;
}
public int getIndex(){
return index;
}
public void setValue(String column, String value){
WebSocketTableCell cell = getValue(column);
if(cell == null) {
WebSocketTableCell newCell = new WebSocketTableCell(column, value);
List<String> columns = schema.columnNames();
boolean match = false;
for(String name : columns) {
if(name.equals(column)) {
match = true;
}
}
if(!match) {
throw new IllegalStateException("Could not find " + column + " in schema");
}
cells.put(column, newCell);
} else {
String previous = cell.getValue();
if(previous != null && !previous.equals(value)) {
WebSocketTableCell replaceCell = new WebSocketTableCell(column, value);
cells.put(column, replaceCell);
}
}
}
public WebSocketTableCell getValue(String column) {
return cells.get(column);
}
public String calculateChange(long lastUpdateDone) {
StringBuilder builder = new StringBuilder();
builder.append(index);
builder.append(":");
String delim = "";
int count = 0;
List<String> columns = schema.columnNames();
for(int i = 0; i < columns.size(); i++){
String column = columns.get(i);
WebSocketTableCell cell = cells.get(column);
if(cell != null) {
long cellChanged = cell.getTimeStamp();
long difference = cellChanged - lastUpdateDone;
if(difference > 0) { // positive means change happened later than update
builder.append(delim);
builder.append(i);
builder.append("=");
builder.append(cell.getValue());
count++;
delim = ",";
}
}
}
if(count <= 0) {
return "";
}
return builder.toString();
}
}
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