// License: GPL. For details, see LICENSE file.
package org.openstreetmap.josm.gui.mappaint;
import java.awt.Color;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.TreeSet;
import java.util.regex.Pattern;
import org.openstreetmap.josm.Main;
import org.openstreetmap.josm.gui.mappaint.mapcss.CSSColors;
import org.openstreetmap.josm.tools.ColorHelper;
import org.openstreetmap.josm.tools.Utils;
/**
* Simple map of properties with dynamic typing.
*/
public final class Cascade {
private final Map<String, Object> prop;
private boolean defaultSelectedHandling = true;
private static final Pattern HEX_COLOR_PATTERN = Pattern.compile("#([0-9a-fA-F]{3}|[0-9a-fA-F]{6}|[0-9a-fA-F]{8})");
/**
* Constructs a new {@code Cascade}.
*/
public Cascade() {
this.prop = new HashMap<>();
}
/**
* Constructs a new {@code Cascade} from existing one.
* @param other other Cascade
*/
public Cascade(Cascade other) {
this.prop = new HashMap<>(other.prop);
}
public <T> T get(String key, T def, Class<T> klass) {
return get(key, def, klass, false);
}
/**
* Get value for the given key
* @param <T> the expected type
* @param key the key
* @param def default value, can be null
* @param klass the same as T
* @param suppressWarnings show or don't show a warning when some value is
* found, but cannot be converted to the requested type
* @return if a value with class klass has been mapped to key, returns this
* value, def otherwise
*/
public <T> T get(String key, T def, Class<T> klass, boolean suppressWarnings) {
if (def != null && !klass.isInstance(def))
throw new IllegalArgumentException(def+" is not an instance of "+klass);
Object o = prop.get(key);
if (o == null)
return def;
T res = convertTo(o, klass);
if (res == null) {
if (!suppressWarnings) {
Main.warn(String.format("Unable to convert property %s to type %s: found %s of type %s!", key, klass, o, o.getClass()));
}
return def;
} else
return res;
}
public Object get(String key) {
return prop.get(key);
}
public void put(String key, Object val) {
prop.put(key, val);
}
public void putOrClear(String key, Object val) {
if (val != null) {
prop.put(key, val);
} else {
prop.remove(key);
}
}
public void remove(String key) {
prop.remove(key);
}
@SuppressWarnings("unchecked")
public static <T> T convertTo(Object o, Class<T> klass) {
if (o == null)
return null;
if (klass.isInstance(o))
return (T) o;
if (klass == float.class || klass == Float.class)
return (T) toFloat(o);
if (klass == double.class || klass == Double.class) {
o = toFloat(o);
if (o != null) {
o = Double.valueOf((Float) o);
}
return (T) o;
}
if (klass == boolean.class || klass == Boolean.class)
return (T) toBool(o);
if (klass == float[].class)
return (T) toFloatArray(o);
if (klass == Color.class)
return (T) toColor(o);
if (klass == String.class) {
if (o instanceof Keyword)
return (T) ((Keyword) o).val;
if (o instanceof Color) {
Color c = (Color) o;
int alpha = c.getAlpha();
if (alpha != 255)
return (T) String.format("#%06x%02x", ((Color) o).getRGB() & 0x00ffffff, alpha);
return (T) String.format("#%06x", ((Color) o).getRGB() & 0x00ffffff);
}
return (T) o.toString();
}
return null;
}
private static Float toFloat(Object o) {
if (o instanceof Number)
return ((Number) o).floatValue();
if (o instanceof String && !((String) o).isEmpty()) {
try {
return Float.valueOf((String) o);
} catch (NumberFormatException e) {
if (Main.isDebugEnabled()) {
Main.debug('\'' + (String) o + "' cannot be converted to float");
}
}
}
return null;
}
private static Boolean toBool(Object o) {
if (o instanceof Boolean)
return (Boolean) o;
String s = null;
if (o instanceof Keyword) {
s = ((Keyword) o).val;
} else if (o instanceof String) {
s = (String) o;
}
if (s != null)
return !(s.isEmpty() || "false".equals(s) || "no".equals(s) || "0".equals(s) || "0.0".equals(s));
if (o instanceof Number)
return ((Number) o).floatValue() != 0;
if (o instanceof List)
return !((List) o).isEmpty();
if (o instanceof float[])
return ((float[]) o).length != 0;
return null;
}
private static float[] toFloatArray(Object o) {
if (o instanceof float[])
return (float[]) o;
if (o instanceof List) {
List<?> l = (List<?>) o;
float[] a = new float[l.size()];
for (int i = 0; i < l.size(); ++i) {
Float f = toFloat(l.get(i));
if (f == null)
return null;
else
a[i] = f;
}
return a;
}
Float f = toFloat(o);
if (f != null)
return new float[] {f};
return null;
}
private static Color toColor(Object o) {
if (o instanceof Color)
return (Color) o;
if (o instanceof Keyword)
return CSSColors.get(((Keyword) o).val);
if (o instanceof String) {
Color c = CSSColors.get((String) o);
if (c != null)
return c;
if (HEX_COLOR_PATTERN.matcher((String) o).matches()) {
return ColorHelper.html2color((String) o);
}
}
return null;
}
@Override
public String toString() {
StringBuilder res = new StringBuilder("Cascade{ ");
// List properties in alphabetical order to be deterministic, without changing "prop" to a TreeMap
// (no reason too, not sure about the potential memory/performance impact of such a change)
TreeSet<String> props = new TreeSet<>();
for (Entry<String, Object> entry : prop.entrySet()) {
StringBuilder sb = new StringBuilder(entry.getKey()).append(':');
Object val = entry.getValue();
if (val instanceof float[]) {
sb.append(Arrays.toString((float[]) val));
} else if (val instanceof Color) {
sb.append(Utils.toString((Color) val));
} else if (val != null) {
sb.append(val);
}
sb.append("; ");
props.add(sb.toString());
}
for (String s : props) {
res.append(s);
}
return res.append('}').toString();
}
public boolean containsKey(String key) {
return prop.containsKey(key);
}
public boolean isDefaultSelectedHandling() {
return defaultSelectedHandling;
}
public void setDefaultSelectedHandling(boolean defaultSelectedHandling) {
this.defaultSelectedHandling = defaultSelectedHandling;
}
}