Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2015 Jakob Hende * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package org.xlrnet.metadict.web.jackson; import com.fasterxml.jackson.core.JsonGenerator; import com.fasterxml.jackson.databind.SerializerProvider; import com.fasterxml.jackson.databind.ser.impl.BeanAsArraySerializer; import com.fasterxml.jackson.databind.ser.impl.ObjectIdWriter; import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase; import org.apache.commons.lang3.NotImplementedException; import org.apache.commons.lang3.StringUtils; import org.xlrnet.metadict.api.query.DictionaryObject; import org.xlrnet.metadict.core.util.FormatUtils; import java.io.IOException; /** * Custom serializer for {@link DictionaryObject} objects that adds a precalculated field with additional information * (i.e. additional forms, grammatical gender, etc) that can be used on clients to avoid performance bottlenecks. */ class DictionaryObjectSerializer extends BeanSerializerBase { protected static final String ADDITIONAL_REPRESENTATION_FIELD_NAME = "additionalRepresentation"; private static final long serialVersionUID = -6223143085371045487L; public DictionaryObjectSerializer(BeanSerializerBase src, ObjectIdWriter objectIdWriter) { super(src, objectIdWriter); } protected DictionaryObjectSerializer(BeanSerializerBase src) { super(src); } public DictionaryObjectSerializer(DictionaryObjectSerializer src, String[] toIgnore) { super(src, toIgnore); } @Override public void serialize(Object bean, JsonGenerator jsonGenerator, SerializerProvider serializerProvider) throws IOException { jsonGenerator.writeStartObject(); serializeFields(bean, jsonGenerator, serializerProvider); if (bean instanceof DictionaryObject) { String representation = FormatUtils.formatDictionaryObjectRepresentation((DictionaryObject) bean); if (StringUtils.isNotEmpty(representation)) { jsonGenerator.writeStringField(ADDITIONAL_REPRESENTATION_FIELD_NAME, representation); } } jsonGenerator.writeEndObject(); } @Override public BeanSerializerBase withObjectIdWriter(ObjectIdWriter objectIdWriter) { return new DictionaryObjectSerializer(this, objectIdWriter); } @Override public BeanSerializerBase withFilterId(Object filterId) { throw new NotImplementedException(getClass().getCanonicalName() + ".withFilterId() is not implemented - avoid using @JsonFilter annotations"); } /** * See {@see BeanSerializer#asArraySerializer} implementation. */ @Override protected BeanSerializerBase asArraySerializer() { if ((_objectIdWriter == null) && (_anyGetterWriter == null) && (_propertyFilterId == null)) { return new BeanAsArraySerializer(this); } return this; } @Override protected BeanSerializerBase withIgnorals(String[] strings) { return new DictionaryObjectSerializer(this, strings); } }