component.java

EXTJS是一个流行的AJAX框架之一 extjs-serverside是一个JAVA开发的EXTJS工具 为EXTjs的AJAX开发带来方便

package com.extjs.serverside.form;

import java.util.HashMap;
import java.util.Map;

public class Component implements Renderable {

	String javascriptClass;
	String fieldName;
	
	Map<String,Object> values = new HashMap<String, Object>();

	public Component(String javascriptClass) {
		super();
		this.javascriptClass = javascriptClass;
	}

	public Component(String javascriptClass,String fieldName) {
		super();
		this.javascriptClass = javascriptClass;
		this.fieldName = fieldName;
	}
	
	
	public void setFieldName(String fieldName) {
		this.fieldName = fieldName;
	}

	public String getFieldName() {
		return fieldName;
	}
	
	
	public void setValue(String key, Object obj) { 
		values.put(key, obj);
	}
	
	protected String renderJavascriptConstructor() {
		StringBuilder s = new StringBuilder();
		s.append("var " + getFieldName() + " = new " + javascriptClass + "("
				+ renderConstructorParameters() + "{\n");
		for (String key : values.keySet()) {
			s.append("    " + key + " : " + renderValue(values.get(key))
					+ ",\n");
		}
		s.append("});\n");
		return s.toString();
	}
	
	public String renderComponent() {
		return renderJavascriptConstructor();
	}
	
	public String renderAddToContainer(RenderableContainer form) {
		return "";
	}
	
	public String renderConstructorParameters() {
		return "";
	}
	

	private String renderValue(Object object) {
		if (object instanceof Number) {
			return object.toString();
		}
		if (object instanceof Boolean) {
			return object.toString();
		}
		if (object instanceof String) {
			return "'"+((String)object).replace("'", "\\'")+"'";
		}
		return "'unknown type :"+object+"'";
	}
	
}