org.commonjava.aprox.model.core.io.ProjectVersionRefSerializerModule.java Source code

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Here is the source code for org.commonjava.aprox.model.core.io.ProjectVersionRefSerializerModule.java

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/*******************************************************************************
 * Copyright (c) 2014 Red Hat, Inc..
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/gpl.html
 * 
 * Contributors:
 *     Red Hat, Inc. - initial API and implementation
 ******************************************************************************/
package org.commonjava.aprox.model.core.io;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

import javax.enterprise.context.ApplicationScoped;

import org.commonjava.maven.atlas.ident.ref.ArtifactRef;
import org.commonjava.maven.atlas.ident.ref.ProjectRef;
import org.commonjava.maven.atlas.ident.ref.ProjectVersionRef;
import org.commonjava.maven.atlas.ident.ref.VersionlessArtifactRef;

import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.SerializerProvider;
import com.fasterxml.jackson.databind.deser.std.StdDeserializer;
import com.fasterxml.jackson.databind.module.SimpleModule;
import com.fasterxml.jackson.databind.ser.std.StdSerializer;

@ApplicationScoped
public class ProjectVersionRefSerializerModule extends SimpleModule {

    private static final long serialVersionUID = 1L;

    public ProjectVersionRefSerializerModule() {
        super("ProjectRef (with variants) Serializer");

        // ProjectRef
        addSerializer(ProjectRef.class, new ProjectRefSerializer<ProjectRef>(ProjectRef.class));

        addDeserializer(ProjectRef.class, new ProjectRefDeserializer<ProjectRef>(ProjectRef.class));

        // ProjectVersionRef
        addSerializer(ProjectVersionRef.class,
                new ProjectRefSerializer<ProjectVersionRef>(ProjectVersionRef.class));

        addDeserializer(ProjectVersionRef.class,
                new ProjectRefDeserializer<ProjectVersionRef>(ProjectVersionRef.class));

        // ArtifactRef
        addSerializer(ArtifactRef.class, new ProjectRefSerializer<ArtifactRef>(ArtifactRef.class));

        addDeserializer(ArtifactRef.class, new ProjectRefDeserializer<ArtifactRef>(ArtifactRef.class));

        // VersionlessArtifactRef
        addSerializer(VersionlessArtifactRef.class,
                new ProjectRefSerializer<VersionlessArtifactRef>(VersionlessArtifactRef.class));

        addDeserializer(VersionlessArtifactRef.class,
                new ProjectRefDeserializer<VersionlessArtifactRef>(VersionlessArtifactRef.class));
    }

    @Override
    public int hashCode() {
        return getClass().getSimpleName().hashCode() + 17;
    }

    @Override
    public boolean equals(final Object other) {
        return getClass().equals(other.getClass());
    }

    private static final class ProjectRefSerializer<T extends ProjectRef> extends StdSerializer<T> {
        ProjectRefSerializer(final Class<T> refCls) {
            super(refCls);
        }

        @Override
        public void serialize(final T src, final JsonGenerator generator, final SerializerProvider provider)
                throws IOException, JsonGenerationException {
            generator.writeString(src.toString());
        }
    }

    private static final class ProjectRefDeserializer<T extends ProjectRef> extends StdDeserializer<T> {
        private static final long serialVersionUID = 1L;

        private final Class<T> refCls;

        ProjectRefDeserializer(final Class<T> refCls) {
            super(refCls);
            this.refCls = refCls;
        }

        @Override
        public T deserialize(final JsonParser jp, final DeserializationContext ctxt)
                throws IOException, JsonProcessingException {
            try {
                final Method parseMethod = refCls.getMethod("parse", String.class);
                return refCls.cast(parseMethod.invoke(null, jp.getText()));
            } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
                throw new IOException("Failed to lookup/invoke parse() method on " + refCls.getSimpleName(), e);
            }
        }
    }

}