viewhelper.java

一个很好的开源项目管理系统源代码

package net.java.workeffort.infrastructure.view;

import java.io.Serializable;

import org.apache.commons.lang.builder.ToStringBuilder;

/**
 * This object is used by JSP to render the buttons and fields
 * (disabled,readonly etc).
 * <p>
 * When used in jstl during iterations, a single instance of this object gets
 * used. To avoid any stale information all instance properties are reset in
 * setMode().
 * @author Antony Joseph
 */
public class ViewHelper implements Serializable {
    public static final String INSERT_MODE = "insert";
    public static final String UPDATE_MODE = "update";
    public static final String DELETE_MODE = "delete";
    public static final String SUBMIT_MODE = "submit";
    public static final String UPDATE_DELETE_MODE = "update_delete";
    public static final String VIEWONLY_MODE = "viewonly";
    
    private String mode;
    private boolean insert = true;
    private boolean update = false;
    private boolean delete = false;
    private boolean viewonly = false;
    
    public ViewHelper() {
    };

    public ViewHelper(String mode) {
        setMode(mode);
    }

    public void setMode(String mode) {
        this.mode = mode;
        if (mode == null || mode.length()==0 ||INSERT_MODE.equals(mode)) {
            insert = true;
            update = false;
            delete = false;
            viewonly = false;
        }
        else if (UPDATE_DELETE_MODE.equals(mode)) {
            insert = false;
            update = true;
            delete = true;
            viewonly = false;
        }
        else if (SUBMIT_MODE.equals(mode)) {
            insert = false;
            update = true;
            delete = true;
            viewonly = false;
        }
        else if (UPDATE_MODE.equals(mode)) {
            insert = false;
            update = true;
            delete = false;
            viewonly = false;
        }
        else if (DELETE_MODE.equals(mode)) {
            insert = false;
            update = false;
            delete = true;
            viewonly = false;
        }
        else {
            insert = false;
            update = false;
            delete = false;
            viewonly = true;
        }
    }

    public String getMode() {
        return this.mode;
    }

    /** @return whether insertable or not */
    public boolean isInsertable() {
        return insert;
    }

    /** @return whether deleteable or not */
    public boolean isDeleteable() {
        return delete;
    }

    /** @return Whether updateable or not */
    public boolean isUpdateable() {
        return update;
    }

    /** @return whether view only */
    public boolean isViewonly() {
        return viewonly;
    }

    public String getKeyReadonly() {
        if (insert)
            return "false";
        else
            return "true";
    }

    public String getFldReadonly() {
        if (viewonly)
            return "true";
        else
            return "false";
    }

    public String getKeyCss() {
        if (insert)
            return "";
        else
            return "readonlyField";
    }

    public String getFldCss() {
        if (viewonly)
            return "readonlyField";
        else
            return "";
    }

    /** @return string representation */
    public String toString() {
        return ToStringBuilder.reflectionToString(this);
    }

}