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smartgwt 2.1 » com » smartgwt » client » data » Record.java
/*
 * SmartGWT (GWT for SmartClient)
 * Copyright 2008 and beyond, Isomorphic Software, Inc.
 *
 * SmartGWT is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.  SmartGWT is also
 * available under typical commercial license terms - see
 * http://smartclient.com/license
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 */

package com.smartgwt.client.data;

import com.smartgwt.client.core.RefDataClass;
import com.smartgwt.client.util.JSOHelper;
import com.google.gwt.core.client.JavaScriptObject;

/**
 * A Record is an ordinary Java class with properties that are treated as data to be displayed and edited by a
 * {@link com.smartgwt.client.widgets.DataBoundComponent}.
 * <p/>
 * {@link com.smartgwt.client.widgets.DataBoundComponent}s have a concept of named fields, where values for each field
 * are found under the same-named property in a Record.
 * <p/>
 * A Record is always an ordinary Java object regardless of how the record is loaded (static data, java server, XML web service, etc).
 * <p/>
 * The concept of working with Records is common to all {@link com.smartgwt.client.widgets.DataBoundComponent}s, although individual
 * DataBoundComponents may work with singular records ({@link com.smartgwt.client.widgets.form.DynamicForm}) or may work with lists
 * ({@link com.smartgwt.client.widgets.grid.ListGrid}), trees ({@link com.smartgwt.client.widgets.tree.TreeGrid}), or cubes
 * (CubeGrid) of records.
 * <p/>
 * <p>Individual DataComponents may also look for special properties on Records which control styling or behavior for those records,
 * such as {@link com.smartgwt.client.widgets.grid.ListGrid#setRecordEditProperty(String)}
 */
public class Record extends RefDataClass {

    public Record() {
    }

    public Record(JavaScriptObject jsObj) {
        super(jsObj);
    }

    public static Record getOrCreateRef(JavaScriptObject jsObj) {
        if (jsObj == null) return null;
        RefDataClass obj = RefDataClass.getRef(jsObj);
        if (obj != null) {
            obj.setJsObj(jsObj);
            return (Record) obj;
        } else {
            return new Record(jsObj);
        }
    }

    /**
     * Returns the nested structure as Record array.
     *
     * @param property the record property
     * @return array of records
     */
    public Record[] getAttributeAsRecordArray(String property) {
        return convertToRecordArray(getAttributeAsJavaScriptObject(property));
    }

    /**
     * Returns the nested structure as a RecordList.
     *
     * @param property the record property
     * @return the RecordList
     */
    public RecordList getAttributeAsRecordList(String property) {
        JavaScriptObject jsObject = getAttributeAsJavaScriptObject(property);
        return jsObject == null ? null : new RecordList(jsObject);
    }

    public static Record[] convertToRecordArray(JavaScriptObject nativeArray) {
        if (nativeArray == null) {
            return new Record[]{};
        }
        if (JSOHelper.isArray(nativeArray)) {
            JavaScriptObject[] componentsj = JSOHelper.toArray(nativeArray);
            Record[] objects = new Record[componentsj.length];
            for (int i = 0; i < componentsj.length; i++) {
                JavaScriptObject componentJS = componentsj[i];
                Record obj = (Record) RefDataClass.getRef(componentJS);
                if (obj == null) obj = new Record(componentJS);
                objects[i] = obj;
            }
            return objects;
        } else {
            Record[] ret = new Record[1];
            ret[0] = Record.getOrCreateRef(nativeArray);
            return ret;
        }
    }
}
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