Update skyAppLink to use optional excludeDefaults to getAll.

runtime/directives/sky-app-link.directive.spec.ts

@@ -22,6 +22,7 @@ describe('SkyAppLink Directive', () => {
   let component: SkyAppLinkTestComponent;
   let fixture: ComponentFixture<SkyAppLinkTestComponent>;
   let debugElement: DebugElement;
+  let getAllParam: boolean;
 
   function setup(params: any, useQueryParams: boolean) {
     let componentToUse = useQueryParams ?
@@ -46,7 +47,10 @@ describe('SkyAppLink Directive', () => {
           useValue: {
             runtime: {
               params: {
-                getAll: () => params
+                getAll: (p?: boolean) => {
+                  getAllParam = p;
+                  return params;
+                }
               }
             },
             skyux: {}
@@ -95,4 +99,10 @@ describe('SkyAppLink Directive', () => {
     expect(directive.attributes['skyAppLink']).toEqual('test');
     expect(directive.properties['href']).toEqual('/test?qp1=1&qp2=false&asdf=123&jkl=mno');
   });
+
+  it('should call getAll with excludeDefaults set to true', () => {
+    setup({}, true);
+    debugElement.query(By.directive(SkyAppLinkDirective));
+    expect(getAllParam).toBe(true);
+  });
 });

runtime/directives/sky-app-link.directive.ts

@@ -16,12 +16,12 @@ export class SkyAppLinkDirective extends RouterLinkWithHref {
 
   @Input()
   set queryParams(params: { [k: string]: any }) {
-    this._queryParams = Object.assign(params, this.skyAppConfig.runtime.params.getAll());
+    this._queryParams = Object.assign(params, this.skyAppConfig.runtime.params.getAll(true));
   }
 
   get queryParams() {
     if (!this._queryParams) {
-      this._queryParams = Object.assign({}, this.skyAppConfig.runtime.params.getAll());
+      this._queryParams = Object.assign({}, this.skyAppConfig.runtime.params.getAll(true));
     }
     return this._queryParams;
   }

runtime/params.spec.ts

@@ -132,6 +132,27 @@ describe('SkyAppRuntimeConfigParams', () => {
     expect(params.get('a2')).toBe('c');
   });
 
+  it('should support excluding default values in getAll() if specified', () => {
+    const params: SkyAppRuntimeConfigParams = new SkyAppRuntimeConfigParams(
+      '?a2=a2Value&a3=a3CustomValue',
+      {
+        // Allowed with simple boolean flag
+        a1: {
+          value: 'a1DefaultValue'
+        },
+        a2: true,
+        a3: {
+          value: 'a3DefaultValue'
+        }
+      }
+    );
+
+    expect(params.getAll(true)).toEqual({
+      a2: 'a2Value',
+      a3: 'a3CustomValue'
+    });
+  });
+
   it('should allow values to be decoded when retrieved from the query string', () => {
     const params = new SkyAppRuntimeConfigParams(
       '?a=%2F',

runtime/params.ts

@@ -21,6 +21,7 @@ function getUrlSearchParams(url: string): URLSearchParams {
 
 export class SkyAppRuntimeConfigParams {
   private params: { [key: string]: string } = {};
+  private defaultParamValues: { [key: string]: string } = {};
   private requiredParams: string[] = [];
   private encodedParams: string[] = [];
 
@@ -60,6 +61,7 @@ export class SkyAppRuntimeConfigParams {
 
             if (paramValue) {
               this.params[paramName] = paramValue;
+              this.defaultParamValues[paramName] = paramValue;
             }
           }
         }
@@ -140,10 +142,19 @@ export class SkyAppRuntimeConfigParams {
   /**
    * Returns the params object
    * @name getAll
+   * @param {boolean} excludeDefaults Exclude params that have default values
    * @returns {Object}
    */
-  public getAll(): Object {
-    return this.params;
+  public getAll(excludeDefaults?: boolean): Object {
+    const filteredParams: { [key: string]: string} = {};
+
+    this.getAllKeys().forEach(key => {
+      if (!excludeDefaults || this.params[key] !== this.defaultParamValues[key]) {
+        filteredParams[key] = this.params[key];
+      }
+    });
+
+    return filteredParams;
   }
 
   /**