Java tutorial
/** * Copyright (C) 2011, 2012 Commission Junction Inc. * * This file is part of httpobjects. * * httpobjects is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * httpobjects is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with httpobjects; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA. * * Linking this library statically or dynamically with other modules is * making a combined work based on this library. Thus, the terms and * conditions of the GNU General Public License cover the whole * combination. * * As a special exception, the copyright holders of this library give you * permission to link this library with independent modules to produce an * executable, regardless of the license terms of these independent * modules, and to copy and distribute the resulting executable under * terms of your choice, provided that you also meet, for each linked * independent module, the terms and conditions of the license of that * module. An independent module is a module which is not derived from * or based on this library. If you modify this library, you may extend * this exception to your version of the library, but you are not * obligated to do so. If you do not wish to do so, delete this * exception statement from your version. */ package org.httpobjects.jackson; import com.fasterxml.jackson.databind.ObjectMapper; import org.httpobjects.Representation; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.OutputStream; public class JacksonDSL { public static class RepresentationConverter { private final Representation representation; private ObjectMapper objectMapper; private final ByteArrayOutputStream byteStream; private RepresentationConverter(Representation representation) { this.representation = representation; this.objectMapper = new ObjectMapper(); this.byteStream = new ByteArrayOutputStream(); } public RepresentationConverter using(ObjectMapper objectMapper) { this.objectMapper = objectMapper; return this; } public <T> T to(Class<T> convertTo) throws IOException { representation.write(byteStream); return objectMapper.readValue(new ByteArrayInputStream(byteStream.toByteArray()), convertTo); } } public static RepresentationConverter convertRepresentation(Representation representation) { return new RepresentationConverter(representation); } public static Representation JacksonJson(final Object object, final ObjectMapper jackson) { return new Representation() { @Override public void write(OutputStream out) { try { jackson.writeValue(out, object); } catch (Exception e) { throw new RuntimeException(e); } } @Override public String contentType() { return "application/json"; } }; } public static Representation JacksonJson(final Object object) { return JacksonJson(object, new ObjectMapper()); } }