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/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for
* full list of contributors). Published under the 2-clause BSD license.
* See license.txt in the OpenLayers distribution or repository for the
* full text of the license. */
/**
* @requires OpenLayers/Layer/Grid.js
*/
/**
* Class: OpenLayers.Layer.ArcGIS93Rest
* Instances of OpenLayers.Layer.ArcGIS93Rest are used to display data from
* ESRI ArcGIS Server 9.3 (and up?) Mapping Services using the REST API.
* Create a new ArcGIS93Rest layer with the <OpenLayers.Layer.ArcGIS93Rest>
* constructor. More detail on the REST API is available at
* http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/index.html ;
* specifically, the URL provided to this layer should be an export service
* URL: http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/export.html
*
* Inherits from:
* - <OpenLayers.Layer.Grid>
*/
OpenLayers.Layer.ArcGIS93Rest = OpenLayers.Class(OpenLayers.Layer.Grid, {
/**
* Constant: DEFAULT_PARAMS
* {Object} Hashtable of default parameter key/value pairs
*/
DEFAULT_PARAMS: {
format: "png"
},
/**
* APIProperty: isBaseLayer
* {Boolean} Default is true for ArcGIS93Rest layer
*/
isBaseLayer: true,
/**
* Constructor: OpenLayers.Layer.ArcGIS93Rest
* Create a new ArcGIS93Rest layer object.
*
* Example:
* (code)
* var arcims = new OpenLayers.Layer.ArcGIS93Rest("MyName",
* "http://sampleserver1.arcgisonline.com/ArcGIS/rest/services/Specialty/ESRI_StateCityHighway_USA/MapServer/export",
* {
* layers: "0,1,2"
* });
* (end)
*
* Parameters:
* name - {String} A name for the layer
* url - {String} Base url for the ArcGIS server REST service
* options - {Object} An object with key/value pairs representing the
* options and option values.
*
* Valid Options:
* format - {String} MIME type of desired image type.
* layers - {String} Comma-separated list of layers to display.
* srs - {String} Projection ID.
*/
initialize: function(name, url, params, options) {
var newArguments = [];
//uppercase params
params = OpenLayers.Util.upperCaseObject(params);
newArguments.push(name, url, params, options);
OpenLayers.Layer.Grid.prototype.initialize.apply(this, newArguments);
OpenLayers.Util.applyDefaults(
this.params,
OpenLayers.Util.upperCaseObject(this.DEFAULT_PARAMS)
);
//layer is transparent
if (this.params.TRANSPARENT &&
this.params.TRANSPARENT.toString().toLowerCase() == "true") {
// unless explicitly set in options, make layer an overlay
if ( (options == null) || (!options.isBaseLayer) ) {
this.isBaseLayer = false;
}
// jpegs can never be transparent, so intelligently switch the
// format, depending on the browser's capabilities
if (this.params.FORMAT == "jpg") {
this.params.FORMAT = OpenLayers.Util.alphaHack() ? "gif"
: "png";
}
}
},
/**
* Method: clone
* Create a clone of this layer
*
* Returns:
* {<OpenLayers.Layer.ArcGIS93Rest>} An exact clone of this layer
*/
clone: function (obj) {
if (obj == null) {
obj = new OpenLayers.Layer.ArcGIS93Rest(this.name,
this.url,
this.params,
this.getOptions());
}
//get all additions from superclasses
obj = OpenLayers.Layer.Grid.prototype.clone.apply(this, [obj]);
// copy/set any non-init, non-simple values here
return obj;
},
/**
* Method: getURL
* Return an image url this layer.
*
* Parameters:
* bounds - {<OpenLayers.Bounds>} A bounds representing the bbox for the
* request.
*
* Returns:
* {String} A string with the map image's url.
*/
getURL: function (bounds) {
bounds = this.adjustBounds(bounds);
// ArcGIS Server only wants the numeric portion of the projection ID.
var projWords = this.projection.getCode().split(":");
var srid = projWords[projWords.length - 1];
var imageSize = this.getImageSize();
var newParams = {
'BBOX': bounds.toBBOX(),
'SIZE': imageSize.w + "," + imageSize.h,
// We always want image, the other options were json, image with a whole lotta html around it, etc.
'F': "image",
'BBOXSR': srid,
'IMAGESR': srid
};
// Now add the filter parameters.
if (this.layerDefs) {
var layerDefStrList = [];
var layerID;
for(layerID in this.layerDefs) {
if (this.layerDefs.hasOwnProperty(layerID)) {
if (this.layerDefs[layerID]) {
layerDefStrList.push(layerID);
layerDefStrList.push(":");
layerDefStrList.push(this.layerDefs[layerID]);
layerDefStrList.push(";");
}
}
}
if (layerDefStrList.length > 0) {
newParams['LAYERDEFS'] = layerDefStrList.join("");
}
}
var requestString = this.getFullRequestString(newParams);
return requestString;
},
/**
* Method: setLayerFilter
* addTile creates a tile, initializes it, and adds it to the layer div.
*
* Parameters:
* id - {String} The id of the layer to which the filter applies.
* queryDef - {String} A sql-ish query filter, for more detail see the ESRI
* documentation at http://sampleserver1.arcgisonline.com/ArcGIS/SDK/REST/export.html
*/
setLayerFilter: function ( id, queryDef ) {
if (!this.layerDefs) {
this.layerDefs = {};
}
if (queryDef) {
this.layerDefs[id] = queryDef;
} else {
delete this.layerDefs[id];
}
},
/**
* Method: clearLayerFilter
* Clears layer filters, either from a specific layer,
* or all of them.
*
* Parameters:
* id - {String} The id of the layer from which to remove any
* filter. If unspecified/blank, all filters
* will be removed.
*/
clearLayerFilter: function ( id ) {
if (id) {
delete this.layerDefs[id];
} else {
delete this.layerDefs;
}
},
/**
* APIMethod: mergeNewParams
* Catch changeParams and uppercase the new params to be merged in
* before calling changeParams on the super class.
*
* Once params have been changed, the tiles will be reloaded with
* the new parameters.
*
* Parameters:
* newParams - {Object} Hashtable of new params to use
*/
mergeNewParams:function(newParams) {
var upperParams = OpenLayers.Util.upperCaseObject(newParams);
var newArguments = [upperParams];
return OpenLayers.Layer.Grid.prototype.mergeNewParams.apply(this,
newArguments);
},
CLASS_NAME: "OpenLayers.Layer.ArcGIS93Rest"
});
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