johnzon-mapper/src/test/java/org/superbiz/ExtendMappingTest.java

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 * regarding copyright ownership. The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
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 * http://www.apache.org/licenses/LICENSE-2.0
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package org.superbiz;

import org.apache.johnzon.mapper.MapperConfig;
import org.apache.johnzon.mapper.Mappings;
import org.apache.johnzon.mapper.access.FieldAccessMode;
import org.apache.johnzon.mapper.converter.EnumConverter;
import org.apache.johnzon.mapper.map.LazyConverterMap;
import org.junit.Test;

import java.lang.reflect.Type;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
import java.util.Map;

import static java.util.Collections.emptyMap;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;

// json libs have a meta registry like our Mappings
// often other libs can use it to do advanced features without instantiating beans (swagger for instance)
// this class ensure we can do it
// that's why it is not in johnzon package
public class ExtendMappingTest {
    @Test // strictly speaking compilation checked 50% of the test
    public void run() {
        final MyMappings myMappings = new MyMappings();
        final Mappings.ClassMapping model = myMappings.findOrCreateClassMapping(MyModel.class);
        assertTrue(myMappings.classes().isEmpty());
        assertEquals(1, model.getters.size());
        assertEquals(1, model.setters.size());
        assertNotNull(FieldAccessMode.FieldReader.class.cast(model.getters.values().iterator().next().reader).getType());
        assertNotNull(FieldAccessMode.FieldWriter.class.cast(model.setters.values().iterator().next().writer).getType());
    }

    public static class MyModel {
        public String name;
    }

    public static class MyMappings extends Mappings {
        public MyMappings() {
            super(new MapperConfig(
                    new LazyConverterMap(), new HashMap<>(), new HashMap<>(),
                    -1, true, true, true, false, false, false,
                    new FieldAccessMode(false, false),
                    StandardCharsets.UTF_8, String::compareTo, false, null, false, false,
                    emptyMap(), true, false, true, null,
                    null, null, null, null,
                    type -> new EnumConverter(type)));
        }

        @Override
        public ClassMapping findOrCreateClassMapping(final Type clazz) {
            final ClassMapping mapping = super.findOrCreateClassMapping(clazz);
            classes.remove(clazz); // no leak for single usage cases
            return mapping;
        }

        public Map<?, ?> classes() {
            return classes;
        }
    }
}