63 lines
2.3 KiB
Java
63 lines
2.3 KiB
Java
package blockchain;
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import blockchain.body.*;
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/**
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* Parser for body record by header type/subType/version.
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*/
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public final class BodyRecordParser {
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private BodyRecordParser() {}
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public static BodyRecord parse(short type, short subType, short version, byte[] bodyBytes) {
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if (bodyBytes == null) throw new IllegalArgumentException("bodyBytes == null");
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int t = type & 0xFFFF;
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int v = version & 0xFFFF;
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int st = subType & 0xFFFF;
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// TECH supports Header v1 and CreateChannel current format (ver=1).
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if (t == (CreateChannelBody.TYPE & 0xFFFF)) {
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if (st == (HeaderBody.SUBTYPE_COMPAT & 0xFFFF) && v == (HeaderBody.VER & 0xFFFF)) {
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return new HeaderBody(subType, version, bodyBytes).check();
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}
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if (st == (CreateChannelBody.SUBTYPE & 0xFFFF)
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&& (v == (CreateChannelBody.VER & 0xFFFF))) {
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return new CreateChannelBody(subType, version, bodyBytes).check();
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}
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throw new IllegalArgumentException(
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String.format("Unknown TECH body type/version/subType: type=%d ver=%d subType=%d", t, v, st)
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);
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}
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int key = (t << 16) | v;
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BodyRecord r = switch (key) {
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case TextBody.KEY -> {
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if (st == (MsgSubType.TEXT_POST & 0xFFFF)
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|| st == (MsgSubType.TEXT_EDIT_POST & 0xFFFF)) {
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yield new TextLineBody(subType, version, bodyBytes);
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}
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if (st == (MsgSubType.TEXT_REPLY & 0xFFFF)
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|| st == (MsgSubType.TEXT_EDIT_REPLY & 0xFFFF)) {
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yield new TextReplyBody(subType, version, bodyBytes);
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}
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throw new IllegalArgumentException("Unknown TEXT subType for type=1 ver=1: subType=" + st);
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}
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case ReactionBody.KEY -> new ReactionBody(subType, version, bodyBytes);
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case ConnectionBody.KEY -> new ConnectionBody(subType, version, bodyBytes);
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case UserParamBody.KEY -> new UserParamBody(subType, version, bodyBytes);
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default -> throw new IllegalArgumentException(String.format(
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"Unknown body type/version from header: type=%d ver=%d subType=%d",
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t, v, st
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));
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};
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return r.check();
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}
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}
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