com.googlecode.blaisemath.json.PaletteDeserializer Maven / Gradle / Ivy
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Support for JSON serialization of blaisemath and some Java types, using Jackson.
package com.googlecode.blaisemath.json;
/*-
* #%L
* blaise-json
* --
* Copyright (C) 2019 Elisha Peterson
* --
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import com.google.common.collect.Maps;
import com.googlecode.blaisemath.encode.ColorCoder;
import com.googlecode.blaisemath.palette.MapPalette;
import com.googlecode.blaisemath.palette.Palette;
import com.googlecode.blaisemath.style.AttributeSet;
import com.googlecode.blaisemath.style.AttributeSetCoder;
import com.googlecode.blaisemath.util.Colors;
import java.awt.Color;
import java.io.IOException;
import java.util.Map;
/**
* Deserializes an {@link AttributeSet} from a string.
* @author Elisha Peterson
*/
public class PaletteDeserializer extends JsonDeserializer {
@Override
public Palette deserialize(JsonParser p, DeserializationContext ctxt) throws IOException {
String val = p.readValueAs(String.class);
return toPalette(new AttributeSetCoder().decode(val));
}
/**
* Convert attribute set to palette, by restricting to just values that are colors or color strings.
* @param attr attribute set
* @return palette
*/
public static Palette toPalette(AttributeSet attr) {
Map cols = Maps.newLinkedHashMap();
attr.getAttributeMap().forEach((key, val) -> {
if (val instanceof String) {
val = ((String) val).trim();
}
if (val instanceof Color) {
cols.put(key, (Color) val);
} else if (val instanceof String && ColorCoder.decodable((String) val)) {
cols.put(key, Colors.decode((String) val));
}
});
return MapPalette.create(cols);
}
}
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