net.neoremind.fountain.Predicates Maven / Gradle / Ivy
package net.neoremind.fountain;
import java.util.Arrays;
import java.util.List;
/**
* 条件验证的逻辑工厂
*
* @author zhangxu
*/
class Predicates {
/**
* 返回多个条件验证，用或来做逻辑
*
* @param components 多个条件验证
* @param 待验证对象类型
*
* @return 或逻辑的条件验证
*/
public static OrPredicate or(ClosurePredicate... components) {
return new OrPredicate(Arrays.asList(components));
}
/**
* 返回多个条件验证，用与来做逻辑
*
* @param components 多个条件验证
* @param 待验证对象类型
*
* @return 与逻辑的条件验证
*/
public static AndPredicate and(ClosurePredicate... components) {
return new AndPredicate(Arrays.asList(components));
}
/**
* 或逻辑的条件验证类
*
* @param 待验证对象类型
*/
private static class OrPredicate implements ClosurePredicate {
private final List> components;
private OrPredicate(List> components) {
this.components = components;
}
@Override
public boolean apply() {
for (int i = 0; i < components.size(); i++) {
if (components.get(i).apply()) {
return true;
}
}
return false;
}
}
/**
* 与逻辑的条件验证类
*
* @param 待验证对象类型
*/
private static class AndPredicate implements ClosurePredicate {
private final List> components;
private AndPredicate(List> components) {
this.components = components;
}
@Override
public boolean apply() {
for (int i = 0; i < components.size(); i++) {
if (!components.get(i).apply()) {
return false;
}
}
return false;
}
}
}