1 files changed, 64 insertions, 0 deletions
diff --git a/src/io/appium/droiddriver/scroll/ForwardingScrollStepStrategy.java b/src/io/appium/droiddriver/scroll/ForwardingScrollStepStrategy.java
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+++ b/src/io/appium/droiddriver/scroll/ForwardingScrollStepStrategy.java
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+/*
+ * Copyright (C) 2013 DroidDriver committers
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package io.appium.droiddriver.scroll;
+
+
+import io.appium.droiddriver.DroidDriver;
+import io.appium.droiddriver.UiElement;
+import io.appium.droiddriver.finders.Finder;
+import io.appium.droiddriver.scroll.Direction.DirectionConverter;
+import io.appium.droiddriver.scroll.Direction.PhysicalDirection;
+
+/**
+ * An abstract base class for implementing the <a
+ * href="http://en.wikipedia.org/wiki/Decorator_pattern">decorator pattern</a>,
+ * forwarding calls to all methods of {@link ScrollStepStrategy} to delegate.
+ */
+public abstract class ForwardingScrollStepStrategy implements ScrollStepStrategy {
+
+  protected ForwardingScrollStepStrategy() {}
+
+  /**
+   * Returns the backing delegate instance that methods are forwarded to.
+   */
+  protected abstract ScrollStepStrategy delegate();
+
+  public boolean scroll(DroidDriver driver, Finder containerFinder, PhysicalDirection direction) {
+    return delegate().scroll(driver, containerFinder, direction);
+  }
+
+  @Override
+  public final DirectionConverter getDirectionConverter() {
+    return delegate().getDirectionConverter();
+  }
+
+  @Override
+  public void beginScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder,
+      PhysicalDirection direction) {
+    delegate().beginScrolling(driver, containerFinder, itemFinder, direction);
+  }
+
+  @Override
+  public void endScrolling(DroidDriver driver, Finder containerFinder, Finder itemFinder,
+      PhysicalDirection direction) {
+    delegate().endScrolling(driver, containerFinder, itemFinder, direction);
+  }
+
+  @Override
+  public void doScroll(UiElement container, PhysicalDirection direction) {
+    delegate().doScroll(container, direction);
+  }
+}