Hello,
I am trying to write a simple template engine to parse if statements.
<{if $value == true}>
say hello
<{/if}>
I have written working code However, If I have multiple if statements in the file I am parsing then if grabs only the first and last if statement. For example.
<{if $value1 == true}>
say hello
<{/if}>
...
<{if $value2 == true}>
say hello
<{/if}>
...
The code parses and returns:
say hello
<{/if}>
...
<{if $value2 == true}>
say hello
Rather than just returning say hello.
Thanks for your help In advance the code is as follows:
public class Templates {
private static String escape(String value) {
return value.replaceAll("\\$", "\\\\\\$");
}
public static String load(String name) {
return load(name, null);
}
public static String load(String name, Map<String, String> parse) {
String page = new Resources().getTextResource("lib/tpl/" + name);
if (page == null) {
return "The template, " + name + " was NOT FOUND.";
}
if (parse != null) {
Iterator it = parse.entrySet().iterator();
while (it.hasNext()) {
Map.Entry entry = (Map.Entry) it.next();
String key = (String) entry.getKey();
String value = (String) entry.getValue();
value = escape(value); // Prevents java exception. Can't deal with $
page = page.replaceAll("\\<\\{\\$" + key + "\\}\\>", value);
}
Pattern ptrn = Pattern.compile("\\<\\{if \\$([a-z]+)\\s*(==|!=|eq|neq|or|and)\\s*(\\w+)\\}\\>(\\p{ASCII}+)\\<\\{/if\\}\\>");
Matcher mtch = ptrn.matcher(page);
System.out.println("\n\n\n");
while(mtch.find()) {
System.out.println("Key is: " + mtch.group(1));
//System.out.println("Key: " + dateMatcher.group(2));
System.out.println("Value is: " + mtch.group(3));
System.out.println("Data is: " + mtch.group(4));
if(parse.get(mtch.group(1)).equals(mtch.group(3))) {
System.out.println("\n\n\nREPLACE");
page = page.replaceAll(ptrn.pattern(), escape(mtch.group(4)));
} else {
//dateMatcher.appendReplacement(page, "");
System.out.println("\n\n\nREMOVE - " + ptrn.pattern());
page = page.replaceAll(ptrn.pattern(), "");
}
}
System.out.println("\n\n\n");
}
return page;
}
}