// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.io;
import static org.openstreetmap.josm.tools.I18n.tr;
import java.util.HashMap;
/**
* Represents the server capabilities
*
*/
public class Capabilities {
private HashMap<String, HashMap<String,String>> capabilities;
public Capabilities() {
capabilities = new HashMap<String, HashMap<String,String>>();
}
public boolean isDefined(String element, String attribute) {
if (! capabilities.containsKey(element)) return false;
HashMap<String, String> e = capabilities.get(element);
if (e == null) return false;
return (e.get(attribute) != null);
}
public String get(String element, String attribute ) {
if (! capabilities.containsKey(element)) return null;
HashMap<String, String> e = capabilities.get(element);
if (e == null) return null;
return e.get(attribute);
}
/**
* replies the value of configuration item in the capabilities as
* double value
*
* @param element the name of the element
* @param attribute the name of the attribute
* @return the value; null, if the respective configuration item doesn't exist
* @throws NumberFormatException if the value is not a valid double
*/
public Double getDouble(String element, String attribute) throws NumberFormatException {
String s = get(element, attribute);
if (s == null) return null;
return Double.parseDouble(s);
}
public Long getLong(String element, String attribute) {
String s = get(element, attribute);
if (s == null) return null;
return Long.parseLong(s);
}
public void put(String element, String attribute, String value) {
if (capabilities == null) {
capabilities = new HashMap<String, HashMap<String,String>>();
}
if (! capabilities.containsKey(element)) {
HashMap<String,String> h = new HashMap<String, String>();
capabilities.put(element, h);
}
HashMap<String, String> e = capabilities.get(element);
e.put(attribute, value);
}
public void clear() {
capabilities = new HashMap<String, HashMap<String,String>>();
}
public boolean supportsVersion(String version) {
return get("version", "minimum").compareTo(version) <= 0
&& get("version", "maximum").compareTo(version) >= 0;
}
/**
* Replies the max number of objects in a changeset. -1 if either the capabilities
* don't include this parameter or if the parameter value is illegal (not a number,
* a negative number)
*
* @return the max number of objects in a changeset
*/
public int getMaxChangesetSize() {
String v = get("changesets", "maximum_elements");
if (v == null) return -1;
try {
int n = Integer.parseInt(v);
if (n <= 0) {
System.err.println(tr("Warning: illegal value of attribute ''{0}'' of element ''{1}'' in server capabilities. Got ''{2}''", "changesets", "maximum_elements", n ));
return -1;
}
return n;
} catch(NumberFormatException e) {
System.err.println(tr("Warning: illegal value of attribute ''{0}'' of element ''{1}'' in server capabilities. Got ''{2}''", "changesets", "maximum_elements", v ));
return -1;
}
}
}