org.simpleflatmapper.reflect.meta.ShortCircuiter Maven / Gradle / Ivy

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Java library to map flat record - ResultSet, csv - to java object with minimum configuration and low footprint.

There is a newer version: 9.0.2

package org.simpleflatmapper.reflect.meta;

import java.util.Arrays;

public class ShortCircuiter {

    private final ClassMeta[][] classMetas;
    private final PropertyNameMatcher[] propertyNameMatchers;

    public ShortCircuiter() {
        classMetas = new ClassMeta[0][];
        propertyNameMatchers = new PropertyNameMatcher[0];
    }

    private ShortCircuiter(ClassMeta[][] classMetas, PropertyNameMatcher[] propertyNameMatchers) {
        this.classMetas = classMetas;
        this.propertyNameMatchers = propertyNameMatchers;
    }

    public ShortCircuiter eval(PropertyNameMatcher propertyNameMatcher, ClassMeta... cm) {
        ClassMeta[][] classMetas = Arrays.copyOf(this.classMetas, this.classMetas.length + 1);
        classMetas[classMetas.length - 1] = cm;
        PropertyNameMatcher[] propertyNameMatchers = Arrays.copyOf(this.propertyNameMatchers, this.propertyNameMatchers.length + 1);
        propertyNameMatchers[propertyNameMatchers.length - 1] = propertyNameMatcher;
        return new ShortCircuiter(classMetas, propertyNameMatchers);
    }

    public boolean shortCircuit() {
        if (propertyNameMatchers.length > 8) return true;

        if (propertyNameMatchers.length > 1) {
            PropertyNameMatcher lastMatch = propertyNameMatchers[propertyNameMatchers.length - 1];
            ClassMeta[] lastMetas = classMetas[classMetas.length - 1];

            for(int i = 0; i < propertyNameMatchers.length -1; i++) {
                if (lastMatch == propertyNameMatchers[i] && Arrays.equals(lastMetas, classMetas[i])) {
                    return true;
                }
            }
        }

        return false;
    }
}