MultipartItem.java

package org.nutz.mock.servlet.multipart;

import java.io.IOException;

import org.nutz.mock.servlet.multipart.inputing.Inputing;
import org.nutz.mock.servlet.multipart.inputing.InputingHelper;
import org.nutz.mock.servlet.multipart.inputing.VoidInputing;

public abstract class MultipartItem {

    public MultipartItem(InputingHelper helper, String boundary) {
        inputs = new Inputing[7];
        last = 0;
        index = 0;
        addInputing(helper.boundary(boundary));
    }

    private Inputing[] inputs;
    private int last;
    private int index;
    private Inputing current;

    protected void addInputing(Inputing in) {
        inputs[last++] = in;
    }

    public long size() {
        long re = 0;
        for (int i = 0; i < last; i++) {
            re += inputs[i].size();
        }
        return re;
    }

    public int read() throws IOException {
        int d = current.read();
        while (d == -1) {
            if (index >= (last - 1))
                return d;
            current = inputs[++index];
            d = current.read();
        }
        return d;
    }

    public void init() throws IOException {
        for (int i = 0; i < last; i++)
            inputs[i].init();

        current = inputs.length > 0 ? inputs[0] : new VoidInputing();
    }

    public void close() throws IOException {
        for (int i = 0; i < last; i++)
            inputs[i].close();

        current = null;
    }

}