NotSpecification.java

package com.cheng.zenofdesignpatterns.extension.newpatterns.specification.common;

/**
 * 非规格书
 */
public class NotSpecification extends CompositeSpecification {

    // 传递一个规格书
    private ISpecification spec;

    public NotSpecification(ISpecification _spec) {
        this.spec = _spec;
    }

    // not操作
    @Override
    public boolean isSatisfiedBy(Object candidate) {
        return !spec.isSatisfiedBy(candidate);
    }

}