io.redisearch.querybuilder.DisjunctNode Maven / Gradle / Ivy

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package io.redisearch.querybuilder;

/**
 * A disjunct node. evaluates to true if any of its children are false. Conversely, this node evaluates to false
 * only iff all of its children are true, making it the exact inverse of {@link IntersectNode}
 *
 * In RS, it looks like:
 *
 * {@code -(@f1:v1 @f2:v2)}
 *
 * @see DisjunctUnionNode which evalutes to true if all its children are false.
 */
public class DisjunctNode extends IntersectNode {
    @Override
    public String toString(ParenMode mode) {
        String ret = super.toString(ParenMode.NEVER);
        if (shouldUseParens(mode)) {
            return "-("  + ret + ")";
        } else {
            return "-" + ret;
        }
    }
}