package org.apache.ambari.server.controller.metrics.ganglia;

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */

import org.apache.ambari.server.controller.utilities.StreamProvider;

import java.io.IOException;
import java.io.InputStream;

public class TestStreamProvider implements StreamProvider {

  private final String fileName;
  private String lastSpec;
  private boolean isLastSpecUpdated;

  public TestStreamProvider(String fileName) {
    this.fileName = fileName;
  }

  @Override
  public InputStream readFrom(String spec) throws IOException {
    if (!isLastSpecUpdated)
      lastSpec = spec;
    
    isLastSpecUpdated = false;
    
    return ClassLoader.getSystemResourceAsStream(fileName);
  }

  public String getLastSpec() {
    return lastSpec;
  }

  @Override
  public InputStream readFrom(String spec, String requestMethod, String params) throws IOException {
    lastSpec = spec + "?" + params;
    isLastSpecUpdated = true;
    return readFrom(spec);
  }
}
