it.uniroma2.sag.kelp.data.representation.structure.similarity.StructureElementSimilarityTypeResolver.java Source code

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Here is the source code for it.uniroma2.sag.kelp.data.representation.structure.similarity.StructureElementSimilarityTypeResolver.java

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/*
 * Copyright 2014 Simone Filice and Giuseppe Castellucci and Danilo Croce and Roberto Basili
 * 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 it.uniroma2.sag.kelp.data.representation.structure.similarity;

import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;

import org.reflections.Reflections;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.annotation.JsonTypeInfo.Id;
import com.fasterxml.jackson.annotation.JsonTypeName;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.jsontype.TypeIdResolver;
import com.fasterxml.jackson.databind.type.TypeFactory;

/**
 * It is a class implementing <code>TypeIdResolver</code> which will be used by
 * Jackson library during the serialization in JSON and deserialization of
 * classes implementing <code>StructureElementSimilarityI</code>, that are used
 * to estimate a similarity function between <code>StructuredElement</code>s
 * 
 * @author Simone Filice
 * 
 */
public class StructureElementSimilarityTypeResolver implements TypeIdResolver {

    private final static Logger logger = LoggerFactory.getLogger(StructureElementSimilarityTypeResolver.class);

    private static Map<String, Class<? extends StructureElementSimilarityI>> idToClassMapping;
    private static Map<Class<? extends StructureElementSimilarityI>, String> classToIdMapping;

    static {
        Reflections reflections = new Reflections("it");
        idToClassMapping = new HashMap<String, Class<? extends StructureElementSimilarityI>>();
        classToIdMapping = new HashMap<Class<? extends StructureElementSimilarityI>, String>();
        Set<Class<? extends StructureElementSimilarityI>> classes = reflections
                .getSubTypesOf(StructureElementSimilarityI.class);
        for (Class<? extends StructureElementSimilarityI> clazz : classes) {
            if (Modifier.isAbstract(clazz.getModifiers())) {
                continue;
            }
            String abbreviation;
            if (clazz.isAnnotationPresent(JsonTypeName.class)) {
                JsonTypeName info = clazz.getAnnotation(JsonTypeName.class);
                abbreviation = info.value();

            } else {
                abbreviation = clazz.getSimpleName();
            }

            idToClassMapping.put(abbreviation, clazz);
            classToIdMapping.put(clazz, abbreviation);
        }
        logger.info("StructureElementSimilarity Implementations: {}", idToClassMapping);
    }

    private JavaType mBaseType;

    public Id getMechanism() {
        return Id.CUSTOM;
    }

    public String idFromBaseType() {
        return idFromValueAndType(null, mBaseType.getRawClass());
    }

    public String idFromValue(Object obj) {
        return idFromValueAndType(obj, obj.getClass());
    }

    public void init(JavaType arg0) {
        mBaseType = arg0;
    }

    public JavaType typeFromId(String arg0) {

        Class<? extends StructureElementSimilarityI> clazz = idToClassMapping.get(arg0);
        if (clazz != null) {
            JavaType type = TypeFactory.defaultInstance().constructSpecializedType(mBaseType, clazz);
            return type;
        }
        throw new IllegalStateException("cannot find mapping for '" + arg0 + "'");
    }

    public String idFromValueAndType(Object arg0, Class<?> arg1) {
        return classToIdMapping.get(arg0.getClass());
    }

}