cn.sylinx.hbatis.ext.ifblock.IfEndMatcherImpl Maven / Gradle / Ivy
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package cn.sylinx.hbatis.ext.ifblock;
import java.util.Stack;
public class IfEndMatcherImpl implements IfEndMatcher {
private Stack stackIfend = new Stack();
private StringBuilder sbIfend = new StringBuilder();
private char keyword = '#';
@Override
public String findMatchIfEnd(String partStatement) {
stackIfend.clear();
sbIfend.setLength(0);
int len = partStatement.length();
boolean meetKeyWord = false;
String node = null;
for (int i = 0; i < len; ++i) {
char c = partStatement.charAt(i);
if (keyword == c) {
meetKeyWord = true;
sbIfend.append(c);
continue;
}
if (meetKeyWord) {
sbIfend.append(c);
node = sbIfend.toString();
if (node.startsWith(Tags.VAR_PREFIX) || node.equals(Tags.KW_ELSIF) || node.equals(Tags.KW_ELSE)
|| node.equals(Tags.KW_FUNC)) {
// 遇到的是非#IF 和 #END
sbIfend.setLength(0);
meetKeyWord = false;
} else if (node.equals(Tags.KW_IF)) {
// 匹配到IF，需要进栈
stackIfend.push(sbIfend.toString());
sbIfend.setLength(0);
meetKeyWord = false;
} else if (node.equals(Tags.KW_END)) {
// 匹配到END，需要出栈
stackIfend.pop();
if (stackIfend.empty()) {
//
return partStatement.substring(0, i + 1);
} else {
sbIfend.setLength(0);
meetKeyWord = false;
}
}
}
}
return null;
}
}