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+/*!
+ * Ext JS Library 3.4.0
+ * Copyright(c) 2006-2011 Sencha Inc.
+ * licensing@sencha.com
+ * http://www.sencha.com/license
+ */
+/**
+ * @class Ext.data.JsonWriter
+ * @extends Ext.data.DataWriter
+ * DataWriter extension for writing an array or single {@link Ext.data.Record} object(s) in preparation for executing a remote CRUD action.
+ */
+Ext.data.JsonWriter = Ext.extend(Ext.data.DataWriter, {
+ /**
+ * @cfg {Boolean} encode <p><tt>true</tt> to {@link Ext.util.JSON#encode JSON encode} the
+ * {@link Ext.data.DataWriter#toHash hashed data} into a standard HTTP parameter named after this
+ * Reader's <code>meta.root</code> property which, by default is imported from the associated Reader. Defaults to <tt>true</tt>.</p>
+ * <p>If set to <code>false</code>, the hashed data is {@link Ext.util.JSON#encode JSON encoded}, along with
+ * the associated {@link Ext.data.Store}'s {@link Ext.data.Store#baseParams baseParams}, into the POST body.</p>
+ * <p>When using {@link Ext.data.DirectProxy}, set this to <tt>false</tt> since Ext.Direct.JsonProvider will perform
+ * its own json-encoding. In addition, if you're using {@link Ext.data.HttpProxy}, setting to <tt>false</tt>
+ * will cause HttpProxy to transmit data using the <b>jsonData</b> configuration-params of {@link Ext.Ajax#request}
+ * instead of <b>params</b>.</p>
+ * <p>When using a {@link Ext.data.Store#restful} Store, some serverside frameworks are
+ * tuned to expect data through the jsonData mechanism. In those cases, one will want to set <b>encode: <tt>false</tt></b>, as in
+ * let the lower-level connection object (eg: Ext.Ajax) do the encoding.</p>
+ */
+ encode : true,
+ /**
+ * @cfg {Boolean} encodeDelete False to send only the id to the server on delete, true to encode it in an object
+ * literal, eg: <pre><code>
+{id: 1}
+ * </code></pre> Defaults to <tt>false</tt>
+ */
+ encodeDelete: false,
+
+ constructor : function(config){
+ Ext.data.JsonWriter.superclass.constructor.call(this, config);
+ },
+
+ /**
+ * <p>This method should not need to be called by application code, however it may be useful on occasion to
+ * override it, or augment it with an {@link Function#createInterceptor interceptor} or {@link Function#createSequence sequence}.</p>
+ * <p>The provided implementation encodes the serialized data representing the Store's modified Records into the Ajax request's
+ * <code>params</code> according to the <code>{@link #encode}</code> setting.</p>
+ * @param {Object} Ajax request params object to write into.
+ * @param {Object} baseParams as defined by {@link Ext.data.Store#baseParams}. The baseParms must be encoded by the extending class, eg: {@link Ext.data.JsonWriter}, {@link Ext.data.XmlWriter}.
+ * @param {Object/Object[]} data Data object representing the serialized modified records from the Store. May be either a single object,
+ * or an Array of objects - user implementations must handle both cases.
+ */
+ render : function(params, baseParams, data) {
+ if (this.encode === true) {
+ // Encode here now.
+ Ext.apply(params, baseParams);
+ params[this.meta.root] = Ext.encode(data);
+ } else {
+ // defer encoding for some other layer, probably in {@link Ext.Ajax#request}. Place everything into "jsonData" key.
+ var jdata = Ext.apply({}, baseParams);
+ jdata[this.meta.root] = data;
+ params.jsonData = jdata;
+ }
+ },
+ /**
+ * Implements abstract Ext.data.DataWriter#createRecord
+ * @protected
+ * @param {Ext.data.Record} rec
+ * @return {Object}
+ */
+ createRecord : function(rec) {
+ return this.toHash(rec);
+ },
+ /**
+ * Implements abstract Ext.data.DataWriter#updateRecord
+ * @protected
+ * @param {Ext.data.Record} rec
+ * @return {Object}
+ */
+ updateRecord : function(rec) {
+ return this.toHash(rec);
+
+ },
+ /**
+ * Implements abstract Ext.data.DataWriter#destroyRecord
+ * @protected
+ * @param {Ext.data.Record} rec
+ * @return {Object}
+ */
+ destroyRecord : function(rec){
+ if(this.encodeDelete){
+ var data = {};
+ data[this.meta.idProperty] = rec.id;
+ return data;
+ }else{
+ return rec.id;
+ }
+ }
+});
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