package com.battery.device.neware;
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import java.util.List;
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import java.util.concurrent.CopyOnWriteArrayList;
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/**
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* 厂商数据源上的语句审计：记录已转发到驱动的语句和被白名单挡下的语句。
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*
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* <p>它让"该数据源从未发出过非查询语句"成为可断言的事实，而不是纪律性约定；
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* 断言对应的测试见 {@code ReadOnlyVendorDataSourceTest}。
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*/
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public final class ReadOnlyStatementAudit
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{
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private final List<String> forwardedStatements = new CopyOnWriteArrayList<>();
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private final List<String> rejectedStatements = new CopyOnWriteArrayList<>();
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void recordForwarded(String statement)
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{
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forwardedStatements.add(abbreviate(statement));
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}
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void recordRejected(String statement)
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{
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rejectedStatements.add(abbreviate(statement));
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}
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/** 已被转发到驱动的语句。 */
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public List<String> forwardedStatements()
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{
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return List.copyOf(forwardedStatements);
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}
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/** 被白名单挡下、从未到达驱动的语句。 */
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public List<String> rejectedStatements()
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{
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return List.copyOf(rejectedStatements);
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}
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private static String abbreviate(String statement)
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{
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if (statement == null) return "";
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String trimmed = statement.trim();
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return trimmed.length() <= 200 ? trimmed : trimmed.substring(0, 200);
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}
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}
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