Java tutorial
import org.apache.commons.beanutils.Converter;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.commons.beanutils.BeanUtilsBean;
import org.apache.commons.beanutils.ConvertUtilsBean;
import org.apache.commons.beanutils.PropertyUtilsBean;
import org.apache.commons.beanutils.ConversionException;
import java.util.Map;
public class BeanUtilsExampleV4 {
public static void main(String args[]) throws Exception {
BeanUtilsExampleV4 diff = new BeanUtilsExampleV4();
Actor actor = diff.prepareData();
ConvertUtilsBean convertUtilsBean = new ConvertUtilsBean();
convertUtilsBean.deregister(String.class);
convertUtilsBean.register(new MyStringConverter(), String.class);
convertUtilsBean.deregister(Long.class);
convertUtilsBean.register(new MyLongConverter(), Long.class);
convertUtilsBean.register(new MyLongConverter(), Long.TYPE);
BeanUtilsBean beanUtilsBean =
new BeanUtilsBean(convertUtilsBean, new PropertyUtilsBean());
System.err.println("==== Values before calling describe ==== ");
System.err.println("By PropertyUtils: " +
PropertyUtils.getProperty(actor, "name"));
System.err.println("By BeanUtils: " +
beanUtilsBean.getProperty(actor, "name"));
System.err.println(beanUtilsBean.getProperty(actor, "worth"));
Map describedData = beanUtilsBean.describe(actor);
// check the map
System.err.println("==== Values in Map ==== ");
System.err.println(describedData.get("name"));
System.err.println(describedData.get("worth"));
// create a new Actor Bean
Actor newActor = new Actor();
beanUtilsBean.populate(newActor, describedData);
System.err.println("==== Values after calling populate ==== ");
System.err.println(beanUtilsBean.getProperty(newActor, "name"));
System.err.println(beanUtilsBean.getProperty(newActor, "worth"));
}
private Actor prepareData() {
Actor actor = new Actor();
actor.setName("Michael Caine");
actor.setGender(1);
actor.setWorth(10000000);
return actor;
}
}
class MyStringConverter implements Converter {
public Object convert(Class type, Object value) {
if (value == null) {
return (String) null;
} else {
return (value.toString().replaceAll("\\s", ""));
}
}
}
class MyLongConverter implements Converter {
private Object defaultValue;
private boolean useDefault;
public MyLongConverter() {
this(true, new Long(0));
}
public MyLongConverter(boolean useDefault, Object defaultValue) {
this.useDefault = useDefault;
this.defaultValue = defaultValue;
}
public Object convert(Class type, Object value) {
if(value == null) {
if(useDefault) {
return defaultValue;
} else {
throw new ConversionException("No default value specified");
}
}
if(value instanceof Long) {
return new Long(((Long)value).longValue() + 1000);
} else {
try {
return new Long(new Long(value.toString()).longValue() + 1000);
} catch (Exception e) {
System.err.println(e);
if(useDefault) {
return defaultValue;
} else {
throw new ConversionException(e);
}
}
}
}
}
------------------------------------------------------------------------
import java.util.Map;
import java.util.List;
import java.util.Date;
public class Movie {
public Movie() {
}
public Date getDateOfRelease() { return this.dateOfRelease; }
public void setDateOfRelease(Date dateOfRelease) {
this.dateOfRelease = dateOfRelease;
}
public String getTitle() { return this.title; }
public void setTitle(String title) {this.title = title; }
public Person getDirector() { return this.director; }
public void setDirector(Person director) { this.director = director; }
public List getActors() { return this.actors; }
public void setActors(List actors) { this.actors= actors; }
public String[] getKeywords() { return this.keywords; }
public void setKeyWords(String[] keywords) { this.keywords = keywords; }
public Map getGenre() { return this.genre; }
public void setGenre(Map genre) { this.genre = genre; }
private Date dateOfRelease;
private String title;
private Person director;
private List actors;
private String[] keywords;
private Map genre;
}------------------------------------------------------------------------
import java.util.Map;
import org.apache.commons.lang.builder.EqualsBuilder;
import org.apache.commons.lang.builder.HashCodeBuilder;
import org.apache.commons.lang.builder.ToStringBuilder;
public class Person {
public Person() {
}
public String getName() {
return this.name == null ? "NoName" : this.name; }
public void setName(String name) { this.name = name; }
public int getGender() { return this.gender; }
public void setGender(int gender) { // 0 - Indeterminate, 1 - Male, 2 - Female
this.gender = (gender > 2 || gender < 0) ? 0 : gender; }
public Map getContactNumber() { return this.contactNumber; }
public void setContactNumber(Map contactNumber) {
this.contactNumber = contactNumber;
}
/**public boolean equals(Object o) {
if(o == this) return true;
if(!(o instanceof Person)) return false;
Person otherPerson = (Person)o;
if(otherPerson.getName().equals(this.name) &&
otherPerson.getGender() == this.gender) return true;
return false;
}*/
public boolean equals(Object o) {
if(!(o instanceof Person)) return false;
Person otherPerson = (Person)o;
return new EqualsBuilder()
.append(name, otherPerson.getName())
.append(gender, otherPerson.getGender())
.isEquals();
}
public int hashCode() {
return new HashCodeBuilder(7, 51)
.append(name)
.append(gender)
.append(contactNumber)
.toHashCode();
}
public String toString() {
return new ToStringBuilder(this)
.append("Name", name)
.append("Gender", gender)
.append("Contact Details", contactNumber)
.toString();
}
private String name;
private int gender;
private Map contactNumber;
}------------------------------------------------------------------------
import java.util.List;
public class Actor extends Person {
public Actor() {
}
public List getMovieCredits() { return this.movieCredits; }
public void setMovieCredits(List movieCredits) {
this.movieCredits = movieCredits;
}
public long getWorth() { return this.worth; }
public void setWorth(long worth) { this.worth = worth; }
private List movieCredits;
private long worth;
}