php,java实现组合模式

组合模式强调整体与部分的关系，如数据结构中的树结构等

类图：

java实现

public abstract class AbsPart {

    public abstract void getInfo();
}

public class Leaf extends AbsPart {
    @Override
    public void getInfo() {

    }
}

public class ConcretePart extends AbsPart {

    private List<AbsPart> list = new ArrayList<>();

    public void addPart(AbsPart absPart){
        this.list.add(absPart);
    }

    @Override
    public void getInfo() {

    }
}

php实现

abstract class AbsPart
{
    public abstract function getInfo();
}

class Leaf extends AbsPart
{
    public function getInfo()
    {
        echo "Leaf";
    }
}

class ConcretePart extends AbsPart
{
    private $arrPart;

    public function __construct()
    {
        $arrPart = array();
    }

    public function addPart(AbsPart $part)
    {
        $this->array[] = $part;
    }

    public function getInfo()
    {
        echo "ConcretePart";
    }
}