org.apache.ibatis.parsing.GenericTokenParser Maven / Gradle / Ivy
package org.apache.ibatis.parsing;
public class GenericTokenParser {
private final String openToken;
private final String closeToken;
private final TokenHandler handler;
public GenericTokenParser(String openToken, String closeToken, TokenHandler handler) {
this.openToken = openToken;
this.closeToken = closeToken;
this.handler = handler;
}
public static interface TokenHandler {
String handleToken(String content);
}
public String parse(String text) {
StringBuilder builder = new StringBuilder();
if (text != null) {
String after = text;
int start = after.indexOf(openToken);
int end = after.indexOf(closeToken);
while (start > -1) {
if (end > start) {
String before = after.substring(0, start);
String content = after.substring(start + openToken.length(), end);
String substitution = handler.handleToken(content);
builder.append(before);
builder.append(substitution);
after = after.substring(end + closeToken.length());
} else if (end > -1) {
String before = after.substring(0, end);
builder.append(before);
builder.append(closeToken);
after = after.substring(end + closeToken.length());
} else {
break;
}
start = after.indexOf(openToken);
end = after.indexOf(closeToken);
}
builder.append(after);
}
return builder.toString();
}
}