bwj_server/src/p2apps/baseclass/tools/GetFieldsName.java

package baseclass.tools;

import p2.p2server.P2Server;
import p2.pao.PaoSetRemote;
import p2.util.P2Exception;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;

public class GetFieldsName {
    String objectname;
    PaoSetRemote ps_objectcols;
    public static HashMap<String, String[]> objectcolsmap = new HashMap<String, String[]>(16);


    /**
     * 构造函数
     *
     * @param objectname 数据表名称
     */
    public GetFieldsName(String objectname) throws P2Exception {
        this.objectname = objectname.toUpperCase();
        if (!objectcolsmap.containsKey(this.objectname)) {
            this.ps_objectcols = P2Server.getP2Server().getPaoSet("ps_objectcols",
                    P2Server.getP2Server().getSystemUserInfo());
            ps_objectcols.setWhere("objectname='" + this.objectname
                    + "' and fieldname!='rmkenable' and fieldname!='recversion' and PERSISTENT=1");
            ps_objectcols.reset();
            int count = ps_objectcols.count();
            String[] allfields = new String[count];
            int i = 0;
            while (ps_objectcols.getPao(i) != null) {
                allfields[i] = ps_objectcols.getPao(i).getString("fieldname");
                i++;
            }
            objectcolsmap.put(this.objectname, allfields);
            ps_objectcols.close();
        }
    }

    /**
     * 获取所有栏位名称
     *
     * @return
     * @throws P2Exception
     */
    public String[] getFields() throws P2Exception {
        return objectcolsmap.get(objectname);
    }

    /**
     * 获取除指定栏位外的栏位名称
     *
     * @param exceptfields 需排除的栏位名称
     * @return
     * @throws P2Exception
     */
    public String[] getFields(String[] exceptfields) throws P2Exception {
        StringBuilder a = new StringBuilder(objectname);
        for (String exceptfield : exceptfields) {
            a.append(exceptfield);
        }
        if (objectcolsmap.containsKey(a.toString())) {
            return objectcolsmap.get(a.toString());
        } else {
            List<String> exceptlist = Arrays.asList(exceptfields);
            String[] allfields = objectcolsmap.get(objectname);
            List<String> list = new ArrayList<String>();
            for (String field : allfields) {
                if (!exceptlist.contains(field)) {
                    list.add(field);
                }
            }
            String[] s = list.toArray(new String[0]);
            objectcolsmap.put(a.toString(), s);
            return s;
        }

    }
}