CompositeSpecification.java

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

/**
 * 组合规格书
 */
public abstract class CompositeSpecification implements ISpecification {

    // 是否满足条件有实现类实现
    public abstract boolean isSatisfiedBy(Object candidate);

    // and操作
    public ISpecification and(ISpecification spec) {
        return new AndSpecification(this, spec);
    }

    // not操作
    public ISpecification not() {
        return new NotSpecification(this);
    }

    // or操作
    public ISpecification or(ISpecification spec) {
        return new OrSpecification(this, spec);
    }

}