1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.io;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.util.HashMap;
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7 |
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8 | /**
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9 | * Represents the server capabilities
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10 | *
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11 | */
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12 | public class Capabilities {
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13 | private HashMap<String, HashMap<String,String>> capabilities;
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14 |
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15 | public Capabilities() {
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16 | capabilities = new HashMap<String, HashMap<String,String>>();
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17 | }
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18 |
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19 | public boolean isDefined(String element, String attribute) {
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20 | if (! capabilities.containsKey(element)) return false;
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21 | HashMap<String, String> e = capabilities.get(element);
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22 | if (e == null) return false;
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23 | return (e.get(attribute) != null);
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24 | }
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25 |
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26 | public String get(String element, String attribute ) {
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27 | if (! capabilities.containsKey(element)) return null;
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28 | HashMap<String, String> e = capabilities.get(element);
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29 | if (e == null) return null;
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30 | return e.get(attribute);
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31 | }
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32 |
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33 | /**
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34 | * replies the value of configuration item in the capabilities as
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35 | * double value
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36 | *
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37 | * @param element the name of the element
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38 | * @param attribute the name of the attribute
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39 | * @return the value; null, if the respective configuration item doesn't exist
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40 | * @throws NumberFormatException if the value is not a valid double
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41 | */
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42 | public Double getDouble(String element, String attribute) throws NumberFormatException {
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43 | String s = get(element, attribute);
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44 | if (s == null) return null;
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45 | return Double.parseDouble(s);
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46 | }
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47 |
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48 | public Long getLong(String element, String attribute) {
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49 | String s = get(element, attribute);
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50 | if (s == null) return null;
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51 | return Long.parseLong(s);
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52 | }
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53 |
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54 | public void put(String element, String attribute, String value) {
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55 | if (capabilities == null) {
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56 | capabilities = new HashMap<String, HashMap<String,String>>();
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57 | }
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58 | if (! capabilities.containsKey(element)) {
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59 | HashMap<String,String> h = new HashMap<String, String>();
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60 | capabilities.put(element, h);
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61 | }
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62 | HashMap<String, String> e = capabilities.get(element);
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63 | e.put(attribute, value);
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64 | }
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65 |
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66 | public void clear() {
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67 | capabilities = new HashMap<String, HashMap<String,String>>();
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68 | }
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69 |
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70 | public boolean supportsVersion(String version) {
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71 | return get("version", "minimum").compareTo(version) <= 0
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72 | && get("version", "maximum").compareTo(version) >= 0;
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73 | }
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74 |
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75 | /**
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76 | * Replies the max number of objects in a changeset. -1 if either the capabilities
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77 | * don't include this parameter or if the parameter value is illegal (not a number,
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78 | * a negative number)
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79 | *
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80 | * @return the max number of objects in a changeset
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81 | */
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82 | public int getMaxChangsetSize() {
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83 | String v = get("changesets", "maximum_elements");
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84 | if (v == null) return -1;
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85 | try {
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86 | int n = Integer.parseInt(v);
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87 | if (n <= 0) {
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88 | System.err.println(tr("Warning: illegal value of attribute '{0}'' of element ''{1}'' in server capabilities. Got ''{2}", "changesets", "maximum_elements", n ));
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89 | return -1;
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90 | }
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91 | return n;
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92 | } catch(NumberFormatException e) {
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93 | System.err.println(tr("Warning: illegal value of attribute '{0}'' of element ''{1}'' in server capabilities. Got ''{2}", "changesets", "maximum_elements", v ));
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94 | return -1;
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95 | }
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96 | }
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97 | }
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