IdPosition.java

package com.taobao.yugong.common.model.position;

import java.util.ArrayList;
import java.util.List;

import com.taobao.yugong.common.model.ProgressStatus;

/**
 * 数据库增量或者全量的中间状态值
 * 
 * @author agapple 2013-9-22 下午3:10:18
 */
public class IdPosition extends Position {

    private static final long    serialVersionUID = -714239193409898959L;
    private Number               id;
    private List<ProgressStatus> progressHistory  = new ArrayList<ProgressStatus>();
    private ProgressStatus       currentProgress  = ProgressStatus.UNKNOW;

    public IdPosition(){
    }

    public Number getId() {
        return id;
    }

    public void setId(Number id) {
        this.id = id;
    }

    public List<ProgressStatus> getProgressHistory() {
        return progressHistory;
    }

    public void setProgressHistory(List<ProgressStatus> progressHistory) {
        this.progressHistory = progressHistory;
    }

    public ProgressStatus getCurrentProgress() {
        return currentProgress;
    }

    public void setCurrentProgress(ProgressStatus currentProgress) {
        if (this.currentProgress != currentProgress && this.currentProgress != ProgressStatus.UNKNOW) {
            this.progressHistory.add(this.currentProgress); // 记录一下历史progress
        }

        this.currentProgress = currentProgress;
    }

    public boolean isInHistory(ProgressStatus progress) {
        return this.progressHistory.contains(progress);
    }

    public IdPosition clone() {
        IdPosition position = new IdPosition();
        position.setId(id);
        position.setCurrentProgress(currentProgress);
        position.setProgressHistory(progressHistory);
        return position;
    }

    @Override
    public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + ((currentProgress == null) ? 0 : currentProgress.hashCode());
        result = prime * result + ((id == null) ? 0 : id.hashCode());
        result = prime * result + ((progressHistory == null) ? 0 : progressHistory.hashCode());
        return result;
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) return true;
        if (obj == null) return false;
        if (getClass() != obj.getClass()) return false;
        IdPosition other = (IdPosition) obj;
        if (currentProgress != other.currentProgress) return false;
        if (id == null) {
            if (other.id != null) return false;
        } else if (!id.equals(other.id)) return false;
        if (progressHistory == null) {
            if (other.progressHistory != null) return false;
        } else if (!progressHistory.equals(other.progressHistory)) return false;
        return true;
    }

}