Easy Id Select

In this example we've created a service that creates SelectModels that return id rather than an object.
It's called SelectIdModelFactory and it is almost identical to SelectModelFactory. In AppModule we add it as a service to Tapestry.
Person: You chose personId:
References: Select, Using Select with a List, SelectModel, SelectModelFactory, Defining Tapestry IOC Services, EventContext.

Home

The source for IPersonFinderServiceLocal and @EJB is shown in the Session Beans and @EJB examples.


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<!-- We need a doctype to allow us to use special characters like &nbsp; 
     We use a "strict" DTD to make IE follow the alignment rules. -->
     
<html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_4.xsd">
<body class="container">
    <h3>Easy Id Select</h3>

    In this example we've created a service that creates SelectModels that return id rather than an object.<br/>
    It's called SelectIdModelFactory and it is almost identical to SelectModelFactory. In AppModule we add it as a service to Tapestry.

    <div class="eg">
        <t:form t:id="form" class="form-inline">
            <div class="form-group">
                Person: 
                <t:select model="personIdsModel" value="personId"/>
                <t:submit/>
                You chose personId: ${personId}
            </div>
        </t:form>
    </div>
    
    References: 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/corelib/components/Select.html">Select</a>,
    <a href="http://tapestry.apache.org/using-select-with-a-list.html">Using Select with a List</a>, 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/SelectModel.html">SelectModel</a>, 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/services/SelectModelFactory.html">SelectModelFactory</a>, 
    <a href="http://tapestry.apache.org/defining-tapestry-ioc-services.html">Defining Tapestry IOC Services</a>, 
    <a href="http://tapestry.apache.org/5.4/apidocs/org/apache/tapestry5/EventContext.html">EventContext</a>.<br/><br/>
    
    <t:pagelink page="Index">Home</t:pagelink><br/><br/>
    
    The source for IPersonFinderServiceLocal and @EJB is shown in the Session Beans and @EJB examples.<br/><br/>
    
    <t:tabgroup>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/select/EasyIdSelect.tml"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/pages/examples/select/EasyIdSelect.java"/>
        <t:sourcecodetab src="/web/src/main/resources/META-INF/assets/css/examples/select.css"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/services/SelectIdModelFactory.java"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/services/SelectIdModelFactoryImpl.java"/>
        <t:sourcecodetab src="/web/src/main/java/jumpstart/web/services/AppModule.java"/>
        <t:sourcecodetab src="/business/src/main/java/jumpstart/business/domain/person/Person.java"/>
    </t:tabgroup>
</body>
</html>


package jumpstart.web.pages.examples.select;

import java.util.List;

import javax.ejb.EJB;

import jumpstart.business.domain.person.Person;
import jumpstart.business.domain.person.iface.IPersonFinderServiceLocal;
import jumpstart.web.services.SelectIdModelFactory;

import org.apache.tapestry5.EventContext;
import org.apache.tapestry5.SelectModel;
import org.apache.tapestry5.annotations.Import;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.ioc.annotations.Inject;

@Import(stylesheet = "css/examples/select.css")
public class EasyIdSelect {
    static private final int MAX_RESULTS = 30;

    // The activation context

    @Property
    private Long personId;

    // Screen fields

    @Property
    private SelectModel personIdsModel;

    // Generally useful bits and pieces

    @Inject
    private SelectIdModelFactory selectIdModelFactory;

    @EJB
    private IPersonFinderServiceLocal personFinderService;

    // The code

    void onActivate(EventContext context) {
        if (context.getCount() > 0) {
            personId = context.get(Long.class, 0);
        }
    }

    Long onPassivate() {    
        return personId;
    }

    void onPrepare() {
        // Get all persons - ask business service to find them (from the database)
        List<Person> persons = personFinderService.findPersons(MAX_RESULTS);

        personIdsModel = selectIdModelFactory.create(persons, "firstName", "id");
    }

}


.eg {
                margin: 20px 0;
                padding: 14px;
                color: #333;
                border: 1px solid #ddd;
                border-radius: 6px;
                -webkit-border-radius: 6px;
                -mox-border-radius: 6px;
}

.eg select.form-control {
                width: auto;
}


// Based on Tapestry's SelectModelFactory.

package jumpstart.web.services;

import java.util.List;

import org.apache.tapestry5.SelectModel;

/**
 * Used to create an {@link org.apache.tapestry5.SelectModel}.
 */
public interface SelectIdModelFactory
{   
    /**
     * Creates a {@link org.apache.tapestry5.SelectModel} from a list of objects of the same type and a label property name and an id property name.
     * The returned model creates for every object in the list a selectable option and relies on existing 
     * {@link org.apache.tapestry5.ValueEncoder} for the object type. The value of the label property is used as user-presentable label for the option.
     * The value of the id property is used as the hidden id for the option.
     * 
     * @param objects objects to create model from
     * @param labelProperty property for the client-side label
     * @param idProperty property for the client-side value
     * @return the model
     */
    public SelectModel create(List<?> objects, String labelProperty, String idProperty);
}


// Based on Tapestry's SelectModelFactoryImpl.

package jumpstart.web.services;

import java.util.List;

import org.apache.tapestry5.OptionModel;
import org.apache.tapestry5.SelectModel;
import org.apache.tapestry5.ValueEncoder;
import org.apache.tapestry5.internal.OptionModelImpl;
import org.apache.tapestry5.internal.SelectModelImpl;
import org.apache.tapestry5.ioc.internal.util.CollectionFactory;
import org.apache.tapestry5.ioc.services.ClassPropertyAdapter;
import org.apache.tapestry5.ioc.services.PropertyAccess;
import org.apache.tapestry5.ioc.services.PropertyAdapter;
import org.apache.tapestry5.services.ValueEncoderSource;

public class SelectIdModelFactoryImpl implements SelectIdModelFactory {
    private final PropertyAccess propertyAccess;
    private final ValueEncoderSource valueEncoderSource;

    public SelectIdModelFactoryImpl(final PropertyAccess propertyAccess, final ValueEncoderSource valueEncoderSource) {
        super();
        this.propertyAccess = propertyAccess;
        this.valueEncoderSource = valueEncoderSource;
    }

    @SuppressWarnings({ "unchecked", "rawtypes" })
    public SelectModel create(final List<?> objects, final String labelProperty, final String idProperty) {
        final List<OptionModel> options = CollectionFactory.newList();

        for (final Object object : objects) {
            final ClassPropertyAdapter classPropertyAdapter = this.propertyAccess.getAdapter(object);

            final PropertyAdapter labelPropertyAdapter = classPropertyAdapter.getPropertyAdapter(labelProperty);
            final ValueEncoder labelEncoder = this.valueEncoderSource.getValueEncoder(labelPropertyAdapter.getType());
            final Object label = labelPropertyAdapter.get(object);

            final PropertyAdapter idPropertyAdapter = classPropertyAdapter.getPropertyAdapter(idProperty);
            final ValueEncoder idEncoder = this.valueEncoderSource.getValueEncoder(idPropertyAdapter.getType());
            final Object id = idPropertyAdapter.get(object);

            options.add(new OptionModelImpl(labelEncoder.toClient(label), idEncoder.toClient(id)));
        }

        return new SelectModelImpl(null, options);
    }
}


package jumpstart.web.services;

import java.util.Map;

import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.SymbolConstants;
import org.apache.tapestry5.Translator;
import org.apache.tapestry5.annotations.Property;
import org.apache.tapestry5.beanvalidator.ClientConstraintDescriptor;
import org.apache.tapestry5.internal.beanvalidator.BaseCCD;
import org.apache.tapestry5.ioc.Configuration;
import org.apache.tapestry5.ioc.MappedConfiguration;
import org.apache.tapestry5.ioc.OrderedConfiguration;
import org.apache.tapestry5.ioc.ServiceBinder;
import org.apache.tapestry5.ioc.annotations.EagerLoad;
import org.apache.tapestry5.ioc.annotations.Inject;
import org.apache.tapestry5.ioc.annotations.Primary;
import org.apache.tapestry5.ioc.annotations.Symbol;
import org.apache.tapestry5.ioc.services.ClasspathURLConverter;
import org.apache.tapestry5.ioc.services.Coercion;
import org.apache.tapestry5.ioc.services.CoercionTuple;
import org.apache.tapestry5.ioc.services.ThreadLocale;
import org.apache.tapestry5.services.BeanBlockContribution;
import org.apache.tapestry5.services.ComponentRequestFilter;
import org.apache.tapestry5.services.DisplayBlockContribution;
import org.apache.tapestry5.services.EditBlockContribution;
import org.apache.tapestry5.services.Request;
import org.apache.tapestry5.services.javascript.DataConstants;
import org.apache.tapestry5.services.javascript.JavaScriptSupport;
import org.apache.tapestry5.services.security.WhitelistAnalyzer;
import org.apache.tapestry5.services.transform.ComponentClassTransformWorker2;
import org.apache.tapestry5.upload.services.UploadSymbols;
import org.joda.time.DateMidnight;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.joda.time.LocalTime;
import org.slf4j.Logger;

import jumpstart.business.validation.constraints.Letters;
import jumpstart.util.JodaTimeUtil;
import jumpstart.web.translators.MoneyTranslator;
import jumpstart.web.translators.YesNoTranslator;

/**
 * This module is automatically included as part of the Tapestry IoC Registry, it's a good place to configure and extend
 * Tapestry, or to place your own service definitions. See http://tapestry.apache.org/5.3.4/tapestry-ioc/module.html
 */
public class AppModule {
    private static final String UPLOADS_PATH = "jumpstart.upload-path";

    @Inject
    @Symbol(SymbolConstants.PRODUCTION_MODE)
    @Property(write = false)
    private static boolean productionMode;

    // Add 2 services to those provided by Tapestry.
    // - CountryNames, and SelectIdModelFactory are used by pages which ask Tapestry to @Inject them.

    public static void bind(ServiceBinder binder) {
        binder.bind(CountryNames.class);
        binder.bind(SelectIdModelFactory.class, SelectIdModelFactoryImpl.class);
    }

    // Tell Tapestry about our custom translators and their message file.
    // We do this by contributing configuration to Tapestry's TranslatorAlternatesSource service, FieldValidatorSource
    // service, and ComponentMessagesSource service.

    @SuppressWarnings("rawtypes")
    public static void contributeTranslatorAlternatesSource(MappedConfiguration<String, Translator> configuration,
            ThreadLocale threadLocale) {
        configuration.add("yesno", new YesNoTranslator("yesno"));
        configuration.add("money2", new MoneyTranslator("money2", 2, threadLocale));
    }

    public void contributeComponentMessagesSource(OrderedConfiguration<String> configuration) {
        configuration.add("myTranslationMessages", "jumpstart/web/translators/TranslationMessages");
    }

    // Tell Tapestry about the client-side (javascript) validators that corresponds to each server-side Bean Validator.

    public static void contributeClientConstraintDescriptorSource(final JavaScriptSupport javaScriptSupport,
            final Configuration<ClientConstraintDescriptor> configuration) {

        configuration.add(new BaseCCD(Letters.class) {

            public void applyClientValidation(MarkupWriter writer, String message, Map<String, Object> attributes) {
                javaScriptSupport.require("beanvalidation/letters");
                writer.attributes(DataConstants.VALIDATION_ATTRIBUTE, true, "data-validate-letters", true,
                        "data-letters-message", message);
            }

        });

    }

    // Tell Tapestry about our custom ValueEncoders.
    // We do this by contributing configuration to Tapestry's ValueEncoderSource service.

    // @SuppressWarnings("rawtypes")
    // public static void contributeValueEncoderSource(MappedConfiguration<Class, Object> configuration) {
    // configuration.addInstance(Person.class, PersonEncoder.class);
    // }

    // Tell Tapestry which locales we support, and tell Tapestry to use its jQuery implementation for its JavaScript.
    // We do this by contributing configuration to Tapestry's ApplicationDefaults service.

    public static void contributeApplicationDefaults(MappedConfiguration<String, String> configuration) {
        configuration.add(SymbolConstants.SUPPORTED_LOCALES, "en_US,en_GB,fr");
        configuration.add(SymbolConstants.JAVASCRIPT_INFRASTRUCTURE_PROVIDER, "jquery");
    }

    // Tell Tapestry how to detect and protect pages that require security.
    // We do this by contributing a custom ComponentRequestFilter to Tapestry's ComponentRequestHandler service.
    // - ComponentRequestHandler is shown in
    // http://tapestry.apache.org/request-processing.html#RequestProcessing-Overview
    // - Based on http://tapestryjava.blogspot.com/2009/12/securing-tapestry-pages-with.html

    public void contributeComponentRequestHandler(OrderedConfiguration<ComponentRequestFilter> configuration) {
        configuration.addInstance("PageProtectionFilter", PageProtectionFilter.class);
    }

    // Tell Tapestry how to handle JBoss 7's classpath URLs - JBoss uses a "virtual file system".
    // We do this by overriding Tapestry's ClasspathURLConverter service.
    // See "Running Tapestry on JBoss" in http://wiki.apache.org/tapestry/Tapestry5HowTos .

    @SuppressWarnings("rawtypes")
    public static void contributeServiceOverride(MappedConfiguration<Class, Object> configuration) {
        configuration.add(ClasspathURLConverter.class, new ClasspathURLConverterJBoss7());
    }

    // Tell Tapestry how to handle @EJB in page and component classes.
    // We do this by contributing configuration to Tapestry's ComponentClassTransformWorker service.
    // - Based on http://wiki.apache.org/tapestry/JEE-Annotation.

    @Primary
    public static void contributeComponentClassTransformWorker(
            OrderedConfiguration<ComponentClassTransformWorker2> configuration) {
        configuration.addInstance("EJB", EJBAnnotationWorker.class, "before:Property");
    }

    // Tell Tapestry how to handle pages annotated with @WhitelistAccessOnly, eg. Tapestry's ServiceStatus and
    // PageCatalog.
    // The default WhitelistAnalyzer allows localhost only and only in non-production mode.
    // Our aim is to make the servicestatus page available to ALL clients when not in production mode.
    // We do this by contributing our own WhitelistAnalyzer to Tapestry's ClientWhitelist service.

    public static void contributeClientWhitelist(OrderedConfiguration<WhitelistAnalyzer> configuration) {
        if (!productionMode) {
            configuration.add("NonProductionWhitelistAnalyzer", new WhitelistAnalyzer() {
                @Override
                public boolean isRequestOnWhitelist(Request request) {
                    if (request.getPath().startsWith("/core/servicestatus")) {
                        return true;
                    }
                    else {
                        // This is copied from org.apache.tapestry5.internal.services.security.LocalhostOnly
                        String remoteHost = request.getRemoteHost();
                        return remoteHost.equals("localhost") || remoteHost.equals("127.0.0.1")
                                || remoteHost.equals("0:0:0:0:0:0:0:1%0") || remoteHost.equals("0:0:0:0:0:0:0:1");
                    }
                }
            }, "before:*");
        }
    }

    // Tell Tapestry how to build our Filer service (used in the FileUpload example).
    // Annotate it with EagerLoad to force resolution of symbols at startup rather than when it is first used.

    @EagerLoad
    public static IFiler buildFiler(Logger logger, @Inject @Symbol(UPLOADS_PATH) final String uploadsPath,
            @Inject @Symbol(UploadSymbols.FILESIZE_MAX) final long fileSizeMax) {
        return new Filer(logger, UPLOADS_PATH, uploadsPath, UploadSymbols.FILESIZE_MAX, fileSizeMax);
    }

    // Tell Tapestry how to coerce Joda Time types to and from Java Date types for the TypeCoercers example.
    // We do this by contributing configuration to Tapestry's TypeCoercer service.
    // - Based on http://tapestry.apache.org/typecoercer-service.html

    @SuppressWarnings("rawtypes")
    public static void contributeTypeCoercer(Configuration<CoercionTuple> configuration) {

        // From java.util.Date to DateMidnight

        Coercion<java.util.Date, DateMidnight> toDateMidnight = new Coercion<java.util.Date, DateMidnight>() {
            public DateMidnight coerce(java.util.Date input) {
                // TODO - confirm this conversion always works, esp. across timezones
                return JodaTimeUtil.toDateMidnight(input);
            }
        };

        configuration.add(new CoercionTuple<>(java.util.Date.class, DateMidnight.class, toDateMidnight));

        // From DateMidnight to java.util.Date

        Coercion<DateMidnight, java.util.Date> fromDateMidnight = new Coercion<DateMidnight, java.util.Date>() {
            public java.util.Date coerce(DateMidnight input) {
                // TODO - confirm this conversion always works, esp. across timezones
                return JodaTimeUtil.toJavaDate(input);
            }
        };

        configuration.add(new CoercionTuple<>(DateMidnight.class, java.util.Date.class, fromDateMidnight));

        // From java.util.Date to LocalDate

        Coercion<java.util.Date, LocalDate> toLocalDate = new Coercion<java.util.Date, LocalDate>() {
            public LocalDate coerce(java.util.Date input) {
                // TODO - confirm this conversion always works, esp. across timezones
                return JodaTimeUtil.toLocalDate(input);
            }
        };

        configuration.add(new CoercionTuple<>(java.util.Date.class, LocalDate.class, toLocalDate));

        // From LocalDate to java.util.Date

        Coercion<LocalDate, java.util.Date> fromLocalDate = new Coercion<LocalDate, java.util.Date>() {
            public java.util.Date coerce(LocalDate input) {
                // TODO - confirm this conversion always works, esp. across timezones
                return JodaTimeUtil.toJavaDate(input);
            }
        };

        configuration.add(new CoercionTuple<>(LocalDate.class, java.util.Date.class, fromLocalDate));
    }

    // Tell Tapestry how its BeanDisplay and BeanEditor can handle the JodaTime types.
    // We do this by contributing configuration to Tapestry's DefaultDataTypeAnalyzer and BeanBlockSource services.
    // - Based on http://tapestry.apache.org/beaneditform-guide.html .

    public static void contributeDefaultDataTypeAnalyzer(
            @SuppressWarnings("rawtypes") MappedConfiguration<Class, String> configuration) {
        configuration.add(DateTime.class, "dateTime");
        configuration.add(DateMidnight.class, "dateMidnight");
        configuration.add(LocalDateTime.class, "localDateTime");
        configuration.add(LocalDate.class, "localDate");
        configuration.add(LocalTime.class, "localTime");
    }

    public static void contributeBeanBlockSource(Configuration<BeanBlockContribution> configuration) {

        configuration.add(new DisplayBlockContribution("dateTime", "infra/AppPropertyDisplayBlocks", "dateTime"));
        configuration
                .add(new DisplayBlockContribution("dateMidnight", "infra/AppPropertyDisplayBlocks", "dateMidnight"));
        configuration
                .add(new DisplayBlockContribution("localDateTime", "infra/AppPropertyDisplayBlocks", "localDateTime"));
        configuration.add(new DisplayBlockContribution("localDate", "infra/AppPropertyDisplayBlocks", "localDate"));
        configuration.add(new DisplayBlockContribution("localTime", "infra/AppPropertyDisplayBlocks", "localTime"));

        configuration.add(new EditBlockContribution("dateMidnight", "infra/AppPropertyEditBlocks", "dateMidnight"));
        configuration.add(new EditBlockContribution("localDate", "infra/AppPropertyEditBlocks", "localDate"));

    }

}


package jumpstart.business.domain.person;

import java.io.Serializable;
import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.EnumType;
import javax.persistence.Enumerated;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.PrePersist;
import javax.persistence.PreUpdate;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Version;
import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;


/**
 * The Person entity.
 */
@Entity
@SuppressWarnings("serial")
public class Person implements Serializable {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(nullable = false)
    private Long id;

    @Version
    @Column(nullable = false)
    private Integer version;

    @Column(length = 10, nullable = false)
    @NotNull
    @Size(max = 10)
    private String firstName;

    @Column(length = 10, nullable = false)
    @NotNull
    @Size(max = 10)
    private String lastName;
    
    @Enumerated(EnumType.STRING)
    @NotNull
    private Regions region;

    @Temporal(TemporalType.DATE)
    @NotNull
    private Date startDate;

    public String toString() {
        final String DIVIDER = ", ";
        
        StringBuilder buf = new StringBuilder();
        buf.append(this.getClass().getSimpleName() + ": ");
        buf.append("[");
        buf.append("id=" + id + DIVIDER);
        buf.append("version=" + version + DIVIDER);
        buf.append("firstName=" + firstName + DIVIDER);
        buf.append("lastName=" + lastName + DIVIDER);
        buf.append("region=" + region + DIVIDER);
        buf.append("startDate=" + startDate);
        buf.append("]");
        return buf.toString();
    }

    // Default constructor is required by JPA.
    public Person() {
    }

    public Person(String firstName, String lastName, Regions region, Date startDate) {
        super();
        this.firstName = firstName;
        this.lastName = lastName;
        this.region = region;
        this.startDate = startDate;
    }

    // The need for an equals() method is discussed at http://www.hibernate.org/109.html
    
    @Override
    public boolean equals(Object obj) {
        return (obj == this) || (obj instanceof Person) && id != null && id.equals(((Person) obj).getId());
    }

    // The need for a hashCode() method is discussed at http://www.hibernate.org/109.html

    @Override
    public int hashCode() {
        return id == null ? super.hashCode() : id.hashCode();
    }

    @PrePersist
    @PreUpdate
    public void validate() throws ValidationException {

    }

    public Long getId() {
        return id;
    }

    public Integer getVersion() {
        return version;
    }

    public void setVersion(Integer version) {
        this.version = version;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public Regions getRegion() {
        return region;
    }

    public void setRegion(Regions region) {
        this.region = region;
    }

    public Date getStartDate() {
        return startDate;
    }

    public void setStartDate(Date startDate) {
        this.startDate = startDate;
    }

}