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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;
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/**
?* Helper class to build valid XML typically returned in a response to the client.
?*
?* 生成xml類型文件的幫助類，我們可以將xml文件放到response中返回給客戶端
?*
?* @author Darren Spurgeon
?* @version $Revision$ $Date$
?*/
public class AjaxXmlBuilder {
?
??? private String encoding = "UTF-8";
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??? private List items = new ArrayList();
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??? public String getEncoding() {
??????? return encoding;
??? }
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??? 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(" ?>");
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??????? 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.
?*
?* 一個通用的item類，代表了一個name-value對
?*
?* @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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