/*
 * Copyright 2015-present Facebook, Inc.
 *
 * 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 com.facebook.buck.android;

import com.facebook.buck.jvm.java.JavacOptions;
import com.facebook.buck.jvm.java.JavacOptionsAmender;
import com.facebook.buck.rules.AddToRuleKey;
import com.facebook.buck.rules.BuildContext;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import java.io.File;
import java.nio.file.Path;
import java.util.List;

class BootClasspathAppender implements JavacOptionsAmender {

  @AddToRuleKey
  @SuppressWarnings("unused")
  private final String bootclasspath = "android";

  private static String androidBootclasspath(AndroidPlatformTarget platform) {
    List<Path> bootclasspathEntries = platform.getBootclasspathEntries();
    Preconditions.checkState(
        !bootclasspathEntries.isEmpty(), "There should be entries for the bootclasspath");
    return Joiner.on(File.pathSeparator).join(bootclasspathEntries);
  }

  @Override
  public JavacOptions amend(JavacOptions original, BuildContext context) {
    return JavacOptions.builder(original)
        .setBootclasspath(androidBootclasspath(context.getAndroidPlatformTargetSupplier().get()))
        .build();
  }
}

@@ -963,31 +963,8 @@
 ath;
-%0Aimport java.util.List;
 %0A%0Acl
@@ -1045,84 +1045,128 @@
 y%0A  
-@SuppressWarnings(%22unused%22)%0A  private final String bootclasspath = %22android%22
+private final AndroidClasspathFromContextFunction classpathFunction =%0A      AndroidClasspathFromContextFunction.INSTANCE
 ;%0A%0A 
@@ -1178,15 +1178,8 @@
 ate 
-static 
 Stri
@@ -1206,113 +1206,105 @@
 ath(
-AndroidPlatformTarget platform) %7B%0A    List%3CPath%3E bootclasspathEntries = platform.getBootclasspathEntries(
+BuildContext context) %7B%0A    Iterable%3CPath%3E bootclasspathEntries = classpathFunction.apply(context
 );%0A 
@@ -1344,9 +1344,8 @@
     
-!
 boot
@@ -1366,14 +1366,25 @@
 es.i
-sEmpty
+terator().hasNext
 (), 
@@ -1635,25 +1635,16 @@
 riginal)
-%0A        
 .setBoot
@@ -1685,60 +1685,10 @@
 text
-.getAndroidPlatformTargetSupplier().get()))%0A        
+))
 .bui

Implement `BootClasspathAppender` in terms of `AndroidExtraClasspathFromContextFunction`