com.oracle.truffle.regex.tregex.nfa.NFAStateTransition Maven / Gradle / Ivy

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 * (a) the Software, and
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package com.oracle.truffle.regex.tregex.nfa;

import com.oracle.truffle.api.CompilerDirectives.CompilationFinal;
import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.regex.charset.CodePointSet;
import com.oracle.truffle.regex.tregex.automaton.AbstractTransition;
import com.oracle.truffle.regex.tregex.parser.ast.GroupBoundaries;
import com.oracle.truffle.regex.tregex.util.json.Json;
import com.oracle.truffle.regex.tregex.util.json.JsonConvertible;
import com.oracle.truffle.regex.tregex.util.json.JsonValue;

/**
 * Provides information about a transition from one NFAState to another state.
 */
public final class NFAStateTransition implements AbstractTransition, JsonConvertible {

    private final short id;
    @CompilationFinal private NFAState source;
    private final NFAState target;
    private final CodePointSet codePointSet;
    private final GroupBoundaries groupBoundaries;

    public NFAStateTransition(short id, NFAState source, NFAState target, CodePointSet codePointSet, GroupBoundaries groupBoundaries) {
        this.id = id;
        this.source = source;
        this.target = target;
        this.codePointSet = codePointSet;
        this.groupBoundaries = groupBoundaries;
    }

    @Override
    public int getId() {
        return id;
    }

    @Override
    public NFAState getSource() {
        return source;
    }

    public void setSource(NFAState source) {
        this.source = source;
    }

    @Override
    public NFAState getTarget() {
        return target;
    }

    public NFAState getSource(boolean forward) {
        return forward ? source : target;
    }

    public CodePointSet getCodePointSet() {
        return codePointSet;
    }

    /**
     * groups entered and exited by this transition.
     */
    public GroupBoundaries getGroupBoundaries() {
        return groupBoundaries;
    }

    @TruffleBoundary
    @Override
    public JsonValue toJson() {
        return Json.obj(Json.prop("id", id),
                        Json.prop("source", source.getId()),
                        Json.prop("target", target.getId()),
                        Json.prop("matcherBuilder", codePointSet.toString()),
                        Json.prop("groupBoundaries", groupBoundaries),
                        Json.prop("sourceSections", groupBoundaries.indexUpdateSourceSectionsToJson(source.getStateSet().getStateIndex())));
    }

    @TruffleBoundary
    public JsonValue toJson(boolean forward) {
        return Json.obj(Json.prop("id", id),
                        Json.prop("source", getSource(forward).getId()),
                        Json.prop("target", getTarget(forward).getId()),
                        Json.prop("matcherBuilder", codePointSet.toString()),
                        Json.prop("groupBoundaries", groupBoundaries),
                        Json.prop("sourceSections", groupBoundaries.indexUpdateSourceSectionsToJson(source.getStateSet().getStateIndex())));
    }
}