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io.polaris.core.string.TokenParsers Maven / Gradle / Ivy
package io.polaris.core.string;
/**
* @author Qt
* @since 1.8, Aug 11, 2023
*/
public class TokenParsers {
public static String parse(String text, String openToken, String closeToken, TokenHandler handler) {
return parse(text, openToken, closeToken, handler, true);
}
public static String parse(String text, String openToken, String closeToken, TokenHandler handler, boolean trimEscapeCharacter) {
if (text == null || text.isEmpty()) {
return "";
}
// 查找 openToken
int start = text.indexOf(openToken, 0);
if (start == -1) {
return text;
}
char[] src = text.toCharArray();
int offset = 0;
final StringBuilder builder = new StringBuilder();
StringBuilder expression = null;
for (; start > -1; start = text.indexOf(openToken, offset)) {
if (start > 0 && src[start - 1] == '\\') {
// 转义符处理
if (trimEscapeCharacter) {
builder.append(src, offset, start - offset - 1).append(openToken);
} else {
builder.append(src, offset, start - offset).append(openToken);
}
offset = start + openToken.length();
continue;
}
// 查找 closeToken
if (expression == null) {
expression = new StringBuilder();
} else {
expression.setLength(0);
}
builder.append(src, offset, start - offset);
offset = start + openToken.length();
int end = text.indexOf(closeToken, offset);
while (end > -1) {
if (end > offset && src[end - 1] == '\\') {
// 转义符处理
if (trimEscapeCharacter) {
expression.append(src, offset, end - offset - 1).append(closeToken);
} else {
expression.append(src, offset, end - offset).append(closeToken);
}
offset = end + closeToken.length();
end = text.indexOf(closeToken, offset);
} else {
expression.append(src, offset, end - offset);
offset = end + closeToken.length();
break;
}
}
if (end == -1) {
// 找不到 endToken
builder.append(src, start, src.length - start);
offset = src.length;
} else {
// 处理 token
builder.append(handler.handleToken(expression.toString().trim()));
offset = end + closeToken.length();
}
}
if (offset < src.length) {
builder.append(src, offset, src.length - offset);
}
return builder.toString();
}
@Deprecated
static String parse0(String text, String openToken, String closeToken, TokenHandler handler, boolean trimEscapeCharacter) {
if (text == null || text.isEmpty()) {
return "";
}
// 查找 openToken
int start = text.indexOf(openToken, 0);
if (start == -1) {
return text;
}
int offset = 0;
final StringBuilder builder = new StringBuilder();
StringBuilder expression = null;
//char[] src = text.toCharArray();
for (; start > -1; start = text.indexOf(openToken, offset)) {
//if (start > 0 && src[start - 1] == '\\') {//src[start - 1]
if (start > 0 && text.charAt(start - 1) == '\\') {
// 转义符处理
if (trimEscapeCharacter) {
//builder.append(src, offset, start - offset - 1).append(openToken);
builder.append(text, offset, start - 1).append(openToken);
} else {
//builder.append(src, offset, start - offset).append(openToken);
builder.append(text, offset, start).append(openToken);
}
offset = start + openToken.length();
continue;
}
// 查找 closeToken
if (expression == null) {
expression = new StringBuilder();
} else {
expression.setLength(0);
}
//builder.append(src, offset, start - offset);
builder.append(text, offset, start);
offset = start + openToken.length();
int end = text.indexOf(closeToken, offset);
while (end > -1) {
// if (end > offset && src[end - 1] == '\\') {
if (end > offset && text.charAt(end - 1) == '\\') {
// 转义符处理
if (trimEscapeCharacter) {
expression.append(text, offset, end - 1).append(closeToken);
// expression.append(src, offset, end - offset - 1).append(closeToken);
} else {
expression.append(text, offset, end).append(closeToken);
// expression.append(src, offset, end - offset).append(closeToken);
}
offset = end + closeToken.length();
end = text.indexOf(closeToken, offset);
} else {
expression.append(text, offset, end);
// expression.append(src, offset, end - offset);
offset = end + closeToken.length();
break;
}
}
if (end == -1) {
// 找不到 endToken
builder.append(text, start, text.length());
//builder.append(src, start, src.length - start);
offset = text.length();
//offset = src.length;
} else {
// 处理 token
builder.append(handler.handleToken(expression.toString()));
offset = end + closeToken.length();
}
}
//if (offset < src.length) {
// builder.append(src, offset, src.length - offset);
//}
if (offset < text.length()) {
builder.append(text, offset, text.length());
}
return builder.toString();
}
}
