/* Copyright c 2005-2012.
* Licensed under GNU LESSER General Public License, Version 3.
* http://www.gnu.org/licenses
*/
package org.beangle.struts2.view.component;
import java.io.Writer;
import java.util.Collections;
import java.util.Map;
import java.util.Random;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang.CharUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.struts2.ServletActionContext;
import org.apache.struts2.util.TextProviderHelper;
import org.beangle.struts2.view.template.TemplateEngine;
import org.beangle.struts2.view.template.Theme;
import org.beangle.struts2.view.template.ThemeStack;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.inject.Container;
import com.opensymphony.xwork2.util.ValueStack;
/**
* @author chaostone
*/
public abstract class UIBean extends Component {
final protected static transient Random RANDOM = new Random();
protected String id;
protected Theme theme;
public UIBean(ValueStack stack) {
super(stack);
}
protected void evaluateParams() {
}
@Override
public boolean end(Writer writer, String body) {
evaluateParams();
try {
mergeTemplate(writer);
} catch (Exception e) {
throw new RuntimeException(e);
}
return false;
}
protected void mergeTemplate(Writer writer) throws Exception {
TemplateEngine engine = getContainer().getInstance(TemplateEngine.class);
engine.render(getTheme().getTemplatePath(getClass(), engine.getSuffix()), stack, writer, this);
}
/**
* 将所有额外参数链接起来
*
* @return 空格开始 空格相隔的参数字符串
*/
public String getParameterString() {
StringBuilder sb = new StringBuilder(parameters.size() * 10);
for (Map.Entry<String, Object> entry : parameters.entrySet()) {
String key = entry.getKey();
if ("cssClass".equals(key)) key = "class";
sb.append(" ").append(key).append("=\"").append(entry.getValue().toString()).append("\"");
}
return sb.toString();
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
protected Theme getTheme() {
if (null == theme) {
ThemeStack themestack = (ThemeStack) stack.getContext().get(Theme.THEME_STACK);
if (null != themestack) {
theme = themestack.peek();
}
if (null == theme) {
theme = (Theme) stack.getContext().get(Theme.THEME);
}
return theme;
} else {
return theme;
}
}
public void setTheme(String theme) {
this.theme = new Theme(theme);
}
/**
* 获得对应的国际化信息
*
* @param text
* @return 当第一个字符不是字母或者不包含.或者包含空格的均返回原有字符串
*/
protected String getText(String text) {
return getText(text, text);
}
protected String getText(String text, String defaultText) {
if (StringUtils.isEmpty(text)) return defaultText;
if (!CharUtils.isAsciiAlpha(text.charAt(0))) return defaultText;
if (-1 == text.indexOf('.') || -1 < text.indexOf(' ')) {
return defaultText;
} else {
return TextProviderHelper.getText(text, defaultText, Collections.emptyList(), stack, false);
}
}
protected String getRequestURI() {
HttpServletRequest req = (HttpServletRequest) stack.getContext().get(
ServletActionContext.HTTP_REQUEST);
return req.getRequestURI();
}
protected Object getValue(Object obj, String property) {
stack.push(obj);
try {
return stack.findValue(property);
} finally {
stack.pop();
}
}
protected Container getContainer() {
return (Container) stack.getContext().get(ActionContext.CONTAINER);
}
protected String render(String uri) {
return getContainer().getInstance(ActionUrlRender.class).render(getRequestURI(), uri);
}
protected void generateIdIfEmpty() {
if (StringUtils.isEmpty(this.id)) {
int nextInt = RANDOM.nextInt();
nextInt = (nextInt == Integer.MIN_VALUE) ? Integer.MAX_VALUE : Math.abs(nextInt);
this.id = Theme.getTemplateName(getClass()) + String.valueOf(nextInt);
}
}
}