Java tutorial
/* * Copyright 2014 Adam Dubiel. * * 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. */ package org.smartparam.manager.json.vendor.jackson; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.ser.std.StdSerializer; import java.io.IOException; import org.smartparam.engine.matchers.type.Range; /** * * @author Adam Dubiel */ public class RangeSerializer extends StdSerializer<Range> { public RangeSerializer() { super(Range.class); } @Override public void serialize(Range value, JsonGenerator jgen, SerializerProvider provider) throws IOException { jgen.writeStartObject(); jgen.writeStringField("type", evaluateType(value)); jgen.writeObjectField("from", value.from()); jgen.writeObjectField("to", value.to()); jgen.writeEndObject(); } private String evaluateType(Range<?> range) { if (range.isFromInfinity() && range.isToInfinity()) { return "Infinity"; } if (!range.isFromInfinity()) { return range.from().getClass().getSimpleName(); } if (!range.isToInfinity()) { return range.to().getClass().getSimpleName(); } throw new IllegalArgumentException( "How can it be that range " + range + " is not infinite yet none of it ends is finite? "); } }