RandFunction.java

package org.vertexium.cypher.functions.math;

import org.vertexium.cypher.VertexiumCypherQueryContext;
import org.vertexium.cypher.ast.model.CypherAstBase;
import org.vertexium.cypher.executor.ExpressionScope;
import org.vertexium.cypher.functions.CypherFunction;

import java.util.Random;

public class RandFunction extends CypherFunction {
    private final Random random = new Random();

    @Override
    public Object invoke(VertexiumCypherQueryContext ctx, CypherAstBase[] arguments, ExpressionScope scope) {
        assertArgumentCount(arguments, 0);
        return random.nextDouble();
    }

    @Override
    public boolean isConstant() {
        return false;
    }
}