ExpressionPatternMatcher.java

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package org.apache.doris.nereids.rules.expression;

import org.apache.doris.nereids.trees.expressions.Expression;

import com.google.common.collect.ImmutableList;

import java.util.List;
import java.util.Objects;
import java.util.function.Predicate;

/** ExpressionPattern */
public class ExpressionPatternMatcher<E extends Expression> {

    public final ExpressionRuleType expressionRuleType;
    public final Class<E> typePattern;
    public final List<Predicate<ExpressionMatchingContext<E>>> predicates;
    public final ExpressionMatchingAction<E> matchingAction;

    public ExpressionPatternMatcher(ExpressionRuleType expressionRuleType, Class<E> typePattern,
            List<Predicate<ExpressionMatchingContext<E>>> predicates,
            ExpressionMatchingAction<E> matchingAction) {
        this.expressionRuleType = Objects.requireNonNull(expressionRuleType, "expressionRuleType can not be null");
        this.typePattern = Objects.requireNonNull(typePattern, "typePattern can not be null");
        this.predicates = predicates == null ? ImmutableList.of() : predicates;
        this.matchingAction = Objects.requireNonNull(matchingAction, "matchingAction can not be null");
    }
}