package org.lilystudio.smarty4j.statement.function;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.Writer;
import java.util.Enumeration;
import java.util.Map;
import java.util.Properties;
import org.lilystudio.smarty4j.Context;
import org.lilystudio.smarty4j.Engine;
import org.lilystudio.smarty4j.ParseException;
import org.lilystudio.smarty4j.Template;
import org.lilystudio.smarty4j.expression.StringExpression;
import org.lilystudio.smarty4j.statement.LineFunction;
import org.lilystudio.smarty4j.statement.ParameterCharacter;
/**
* 加载变量配置文件，文件的数据使用NAME=VALUE的标准格式。
*
* <pre>
* file--文件名
* scope--变量作用的范围，global(全局)/parent(父模板)/local(当前模板)，默认值为local
* </pre>
*
* @version 1.0.0, 2010/10/01
* @author 欧阳先伟
* @since Smarty 1.0
*/
public class $config_load extends LineFunction {
/** 参数定义 */
private static ParameterCharacter[] definitions = {
new ParameterCharacter(ParameterCharacter.STRING, "file"),
new ParameterCharacter(ParameterCharacter.STRING, new StringExpression(
"local"), "scope") };
/** 配置参数加载的类型 */
private int type;
@Override
public void execute(Context context, Writer writer, Object[] values)
throws IOException {
Template template = context.getTemplate();
FileInputStream in = new FileInputStream(template.getPath(
(String) values[0], true));
Properties prop = new Properties();
try {
prop.load(in);
} finally {
in.close();
}
// 取得父容器的配置信息
Engine engine = template.getEngine();
Map<String, Object> config = context.getConfigures();
Context parentContext = context.getParent();
Map<String, Object> parent;
if (parentContext != null) {
parent = parentContext.getConfigures();
} else {
parent = null;
}
// 根据配置加载的级别, 设置配置的内容范围
for (Enumeration<?> i = prop.propertyNames(); i.hasMoreElements();) {
String key = i.nextElement().toString();
String value = prop.getProperty(key);
config.put(key, value);
if (type < 2) {
if (parent != null) {
parent.put(key, value);
}
if (type < 1) {
engine.addConfig(key, value);
}
}
}
}
@Override
public void syntax(Template template, Object[] words, int wordSize)
throws ParseException {
super.syntax(template, words, wordSize);
String scope = getParameter(1).toString();
if (scope.equals("local")) {
type = 2;
} else if (scope.equals("parent")) {
type = 1;
} else if (scope.equals("global")) {
type = 0;
} else {
throw new ParseException("scope必须是: global, parent, local");
}
}
public ParameterCharacter[] getDefinitions() {
return definitions;
}
}