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//================================ AjaxXmlBuilder======================
import java.lang.reflect.InvocationTargetException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.beanutils.BeanUtils;
import org.apache.commons.lang.builder.ToStringBuilder;
/**
* Helper class to build valid XML typically returned in a response to the client.
*
* 生成xml类型文件的帮助类，我们可以将xml文件放到response中返回给客户端
*
* @author Darren Spurgeon
* @version $Revision$ $Date$
*/
public class AjaxXmlBuilder {
private String encoding = "UTF-8";
private List items = new ArrayList();
public String getEncoding() {
return encoding;
}
public void setEncoding(String encoding) {
this.encoding = encoding;
}
/**
* Add item to XML.
*
* @param name
* The name of the item
* @param value
* The value of the item
* @return
*/
public AjaxXmlBuilder addItem(String name, String value) {
items.add(new Item(name, value, false));
return this;
}
/**
* Add item wrapped with inside a CDATA element.
*
* @param name
* The name of the item
* @param value
* The value of the item
* @return
*/
public AjaxXmlBuilder addItemAsCData(String name, String value) {
items.add(new Item(name, value, true));
return this;
}
/**
* Add items from a collection.
*
* @param collection
* @param nameProperty
* @param valueProperty
* @return
* @throws IllegalAccessException
* @throws InvocationTargetException
* @throws NoSuchMethodException
*/
public AjaxXmlBuilder addItems(Collection collection, String nameProperty,
String valueProperty) throws IllegalAccessException,
InvocationTargetException, NoSuchMethodException {
return addItems(collection, nameProperty, valueProperty, false);
}
/**
* Add items from a collection.
*
* @param collection
* @param nameProperty
* @param valueProperty
* @return
* @throws IllegalAccessException
* @throws InvocationTargetException
* @throws NoSuchMethodException
*/
public AjaxXmlBuilder addItems(Collection collection, String nameProperty,
String valueProperty, boolean asCData)
throws IllegalAccessException, InvocationTargetException,
NoSuchMethodException {
for (Iterator iter = collection.iterator(); iter.hasNext();) {
Object element = (Object) iter.next();
String name = BeanUtils.getProperty(element, nameProperty);
String value = BeanUtils.getProperty(element, valueProperty);
if (asCData) {
items.add(new Item(name, value, false));
} else {
items.add(new Item(name, value, true));
}
}
return this;
}
/**
* Add items from a collection as CDATA element.
*
* @param collection
* @param nameProperty
* @param valueProperty
* @return
* @throws IllegalAccessException
* @throws InvocationTargetException
* @throws NoSuchMethodException
*/
public AjaxXmlBuilder addItemsAsCData(Collection collection,
String nameProperty, String valueProperty)
throws IllegalAccessException, InvocationTargetException,
NoSuchMethodException {
return addItems(collection, nameProperty, valueProperty, true);
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
StringBuffer xml = new StringBuffer().append("<?xml version=\"1.0\"");
if (encoding != null) {
xml.append(" encoding=\"");
xml.append(encoding);
xml.append("\"");
}
xml.append(" ?>");
xml.append("<ajax-response>");
xml.append("<response>");
for (Iterator iter = items.iterator(); iter.hasNext();) {
Item item = (Item) iter.next();
xml.append("<item>");
xml.append("<name>");
if (item.isAsCData()) {
xml.append("<![CDATA[");
}
xml.append(item.getName());
if (item.isAsCData()) {
xml.append("]]>");
}
xml.append("</name>");
xml.append("<value>");
if (item.isAsCData()) {
xml.append("<![CDATA[");
}
xml.append(item.getValue());
if (item.isAsCData()) {
xml.append("]]>");
}
xml.append("</value>");
xml.append("</item>");
}
xml.append("</response>");
xml.append("</ajax-response>");
return xml.toString();
}
}
/**
* A generic item class, basically representing a name-value pair.
*
* 一个通用的item类，代表了一个name-value对
*
* @author Darren Spurgoen
* @version $Revision$ $Date$
*/
class Item {
private String name;
private String value;
private boolean asData;
/**
* Constructor for Item.
*/
public Item() {
super();
}
/**
* Constructor for Item.
*
* @param name
* @param value
*/
public Item(String name, String value, boolean asData) {
super();
this.name = name;
this.value = value;
this.asData = asData;
}
/**
* @return Returns the name.
*/
public String getName() {
return this.name;
}
/**
* @param name
* The name to set.
*/
public void setName(String name) {
this.name = name;
}
/**
* @return Returns the value.
*/
public String getValue() {
return this.value;
}
/**
* @param value
* The value to set.
*/
public void setValue(String value) {
this.value = value;
}
/**
* @return Returns the asCData.
*/
public boolean isAsCData() {
return this.asData;
}
/**
* @param asData
* The asData to set.
*/
public void setAsData(boolean asData) {
this.asData = asData;
}
/**
* @see java.lang.Object#toString()
*/
public String toString() {
return new ToStringBuilder(this).append("name", name).append("value",
value).append("asData", asData).toString();
}
}
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