package jnpf.audit;
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/** 由后端签发的 biz_sign 派生稳定的审计操作分组键。 */
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public final class AuditOperationIds {
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private static final String PREFIX = "BS-";
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private static final int MAX_SIGN_LENGTH = 40;
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public static String correlation(String bizSign) {
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String normalized = normalize(bizSign);
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return normalized == null ? null : PREFIX + normalized;
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}
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private static String normalize(String bizSign) {
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if (bizSign == null) {
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return null;
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}
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String value = bizSign.trim();
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if (value.isEmpty() || value.length() > MAX_SIGN_LENGTH) {
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return null;
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}
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for (int i = 0; i < value.length(); i++) {
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char ch = value.charAt(i);
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boolean asciiLetter = (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
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if (!asciiLetter && (ch < '0' || ch > '9') && ch != '-' && ch != '_') {
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return null;
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}
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}
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return value;
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}
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private AuditOperationIds() {
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}
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}
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