StripHal.java

/*
 * #%L
 * wcm.io
 * %%
 * Copyright (C) 2014 wcm.io
 * %%
 * 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
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package io.wcm.caravan.pipeline.extensions.hal.action;

import org.osgi.annotation.versioning.ProviderType;

import io.wcm.caravan.hal.resource.HalResource;
import io.wcm.caravan.pipeline.JsonPipelineAction;
import io.wcm.caravan.pipeline.JsonPipelineContext;
import io.wcm.caravan.pipeline.JsonPipelineOutput;
import rx.Observable;

/**
 * Action which only emits the HAL state and removes meta data like links and embedded resources.
 */
@ProviderType
public final class StripHal implements JsonPipelineAction {

  @Override
  public String getId() {
    return "STRIP-HAL";
  }

  @Override
  public Observable<JsonPipelineOutput> execute(JsonPipelineOutput previousStepOutput, JsonPipelineContext context) {
    HalResource halResource = new HalResource(previousStepOutput.getPayload());
    halResource.removeEmbedded().removeLinks();
    return Observable.just(previousStepOutput);
  }

}