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afterhill/AddressForTest.java

Created April 23, 2013 18:23
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AddressForTest.java
package exercise;
@Exportable("address")
public class AddressForTest {
@Persistent
private String country = null;
@Persistent
private String province = null;
@Persistent
private String city = null;
@Persistent
private String street = null;
@Persistent
private String door = null;
public AddressForTest(String country, String province, String city,
String street, String door) {
this.country = country;
this.province = province;
this.city = city;
this.street = street;
this.door = door;
}
}
Raw
AddressListForTest.java
package exercise;
import java.util.ArrayList;
@Exportable(name="addressList", description="address list")
public class AddressListForTest {
@Persistent
private String friendName = null;
@Persistent
private int age = 0;
@Persistent
private ArrayList<String> telephone = null;
@Persistent
private ArrayList<AddressForTest> addressForTest = null;
@Persistent
private String note = null;
public AddressListForTest(String friendName, int age, ArrayList<String> telephone,
ArrayList<AddressForTest> addressList, String note) {
this.friendName = friendName;
this.age = age;
this.telephone = telephone;
this.addressForTest = addressList;
this.note = note;
}
}
Raw
Exportable.java
package exercise;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
@Retention(RetentionPolicy.RUNTIME)
public @interface Exportable {
String name() default "";
String value() default "";
String description() default "";
}
Raw
ExportToXML.java
package exercise;
import java.lang.reflect.Field;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.Map;
public class ExportToXML {
public void exportFields(Object obj) throws IllegalArgumentException,
IllegalAccessException {
Exportable exportable = obj.getClass().getAnnotation(Exportable.class);
if (exportable != null) {
if (exportable.value().length() > 0) {
//System.out.println("Class annoation Name: " + exportable.name());
} else {
//System.out.println("Class annoation Name: "
// + exportable.value());
}
} else {
//System.out.println(obj.getClass().getName()
// + " class does not yet having" + " an annotation!");
}
Field[] fields = obj.getClass().getDeclaredFields();
for (Field field : fields) {
Persistent fieldAnnotation = field.getAnnotation(Persistent.class);
if (fieldAnnotation == null) {
continue;
}
field.setAccessible(true);
Class<?> typeClass = field.getType();
String name = field.getName();
String value = getFieldValue(field, typeClass, obj);
if (value != null) {
System.out
.println(getIndent() + "<" + name + ">\n" + getIndent()
+ "\t" + value + "\n" + getIndent() + "</"
+ name + ">");
} else if ((field.get(obj) instanceof Collection)
|| (field.get(obj) instanceof Map)) {
exportObject(field.get(obj));
}
}
}
private void exportObject(Object object) throws IllegalArgumentException,
IllegalAccessException {
Exportable exportable = null;
String elementName = null;
if (cyclicChecker.contains(object)) {
return;
}
cyclicChecker.add(object);
if (object instanceof Collection) {
Iterator<?> i = ((Collection<?>) object).iterator();
for (; i.hasNext();) {
exportObject(i.next());
}
} else if (object instanceof Map) {
for (Iterator<?> i = ((Map<?, ?>) object).keySet().iterator(); i
.hasNext();) {
exportObject(i.next());
}
} else {
exportable = object.getClass().getAnnotation(Exportable.class);
if (exportable != null) {
if (exportable.value().length() > 0) {
elementName = exportable.value();
} else {
elementName = exportable.name();
}
}
if (exportable == null || elementName.length() == 0) {
elementName = object.getClass().getSimpleName();
}
System.out.println(getIndent() + "<" + elementName + ">");
levelDepth++;
if (exportable == null) {
System.out.println(getIndent() + object.toString());
} else {
exportFields(object);
}
levelDepth--;
System.out.println(getIndent() + "</" + elementName + ">");
}
cyclicChecker.remove(object);
}
int levelDepth = 0;
Collection<Object> cyclicChecker = new ArrayList<Object>();
private String getIndent() {
String s = "";
for (int i = 0; i < levelDepth; i++) {
s += "\t";
}
return s;
}
private String getFieldValue(Field field, Class<?> typeClass, Object obj) {
String value = null;
try {
if (typeClass == String.class)
value = (String) field.get(obj);
else if (typeClass == int.class)
value = Integer.toString(field.getInt(obj));
else if (typeClass == long.class)
value = Long.toString(field.getLong(obj));
else if (typeClass == float.class)
value = Float.toString(field.getFloat(obj));
else if (typeClass == double.class)
value = Double.toString(field.getDouble(obj));
else if (typeClass == short.class)
value = Short.toString(field.getShort(obj));
else if (typeClass == byte.class)
value = Byte.toString(field.getByte(obj));
else if (typeClass == char.class)
value = Character.toString(field.getChar(obj));
else if (typeClass == boolean.class)
value = Boolean.toString(field.getBoolean(obj));
} catch (Exception e) {
e.printStackTrace();
value = null;
}
return value;
}
public static void main(String[] args) throws IllegalArgumentException,
IllegalAccessException {
AddressForTest address = new AddressForTest("China", "Beijing",
"Beijing", "Big", "180");
ExportToXML etx = new ExportToXML();
ArrayList<String> telephoneList = new ArrayList<String>();
telephoneList.add("61324124");
telephoneList.add("13424231");
ArrayList<AddressForTest> addressList = new ArrayList<>();
addressList.add(address);
AddressListForTest adl = new AddressListForTest("coolbaby", 18,
telephoneList, addressList, "I LOVE U EVER!");
etx.exportObject(adl);
}
}
Raw
Persistent.java
package exercise;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
@Retention(RetentionPolicy.RUNTIME)
public @interface Persistent {
String value() default "";
}
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