Java tutorial
/* * GoogleBaseGenerator.java * * Created on November 17, 2005, 2:46 PM * * This library is provided under dual licenses. * You may choose the terms of the Lesser General Public License or the Apache * License at your discretion. * * Copyright (C) 2005 Robert Cooper, Temple of the Screaming Penguin * * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * * 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 com.rometools.modules.base.io; import java.beans.PropertyDescriptor; import java.net.URL; import java.util.Date; import java.util.HashMap; import java.util.HashSet; import java.util.Set; import org.jdom2.Element; import org.jdom2.Namespace; import com.rometools.modules.base.GoogleBase; import com.rometools.modules.base.GoogleBaseImpl; import com.rometools.modules.base.types.CurrencyEnumeration; import com.rometools.modules.base.types.DateTimeRange; import com.rometools.modules.base.types.FloatUnit; import com.rometools.modules.base.types.GenderEnumeration; import com.rometools.modules.base.types.IntUnit; import com.rometools.modules.base.types.PaymentTypeEnumeration; import com.rometools.modules.base.types.PriceTypeEnumeration; import com.rometools.modules.base.types.ShippingType; import com.rometools.modules.base.types.ShortDate; import com.rometools.modules.base.types.Size; import com.rometools.modules.base.types.YearType; import com.rometools.rome.feed.module.Module; import com.rometools.rome.io.ModuleGenerator; /** * * @author <a href="mailto:cooper@screaming-penguin.com">Robert "kebernet" Cooper * @version $Revision: 1.1 $ */ public class GoogleBaseGenerator implements ModuleGenerator { private static final Namespace NS = Namespace.getNamespace("g-core", GoogleBase.URI); /** Creates a new instance of GoogleBaseGenerator */ public GoogleBaseGenerator() { super(); } @Override public String getNamespaceUri() { return GoogleBase.URI; } @Override public Set<Namespace> getNamespaces() { final HashSet<Namespace> set = new HashSet<Namespace>(); set.add(GoogleBaseGenerator.NS); return set; } @Override public void generate(final Module module, final Element element) { final GoogleBaseImpl mod = (GoogleBaseImpl) module; final HashMap<Object, Object> props2tags = new HashMap<Object, Object>(GoogleBaseParser.PROPS2TAGS); final PropertyDescriptor[] pds = GoogleBaseParser.pds; for (final PropertyDescriptor pd : pds) { final String tagName = (String) props2tags.get(pd.getName()); if (tagName == null) { continue; } Object[] values = null; try { if (pd.getPropertyType().isArray()) { values = (Object[]) pd.getReadMethod().invoke(mod, (Object[]) null); } else { values = new Object[] { pd.getReadMethod().invoke(mod, (Object[]) null) }; } for (int j = 0; values != null && j < values.length; j++) { if (values[j] != null) { element.addContent(generateTag(values[j], tagName)); } } } catch (final Exception e) { e.printStackTrace(); } } } public Element generateTag(final Object o, final String tagName) { if (o instanceof URL || o instanceof Float || o instanceof Boolean || o instanceof Integer || o instanceof String || o instanceof FloatUnit || o instanceof IntUnit || o instanceof GenderEnumeration || o instanceof PaymentTypeEnumeration || o instanceof PriceTypeEnumeration || o instanceof CurrencyEnumeration || o instanceof Size || o instanceof YearType) { return generateSimpleElement(tagName, o.toString()); } else if (o instanceof ShortDate) { return generateSimpleElement(tagName, GoogleBaseParser.SHORT_DT_FMT.format(o)); } else if (o instanceof Date) { return generateSimpleElement(tagName, GoogleBaseParser.LONG_DT_FMT.format(o)); } else if (o instanceof ShippingType) { final ShippingType st = (ShippingType) o; final Element element = new Element(tagName, GoogleBaseGenerator.NS); element.addContent(generateSimpleElement("country", st.getCountry())); element.addContent(generateSimpleElement("service", st.getService().toString())); element.addContent(generateSimpleElement("price", st.getPrice().toString())); return element; } else if (o instanceof DateTimeRange) { final DateTimeRange dtr = (DateTimeRange) o; final Element element = new Element(tagName, GoogleBaseGenerator.NS); element.addContent(generateSimpleElement("start", GoogleBaseParser.LONG_DT_FMT.format(dtr.getStart()))); element.addContent(generateSimpleElement("end", GoogleBaseParser.LONG_DT_FMT.format(dtr.getEnd()))); return element; } throw new RuntimeException("Unknown class type to handle: " + o.getClass().getName()); } protected Element generateSimpleElement(final String name, final String value) { final Element element = new Element(name, GoogleBaseGenerator.NS); element.addContent(value); return element; } }