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package org.qas.qtest.api.internal.model;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import org.qas.api.internal.PropertyContainer;
import org.qas.api.internal.util.StringInputStream;
import org.qas.api.internal.util.google.base.Throwables;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Collections;
import java.util.List;

/**
 * QTestBaseModel
 *
 * @author Dzung Nguyen
 * @version $Id QTestBaseModel 2014-03-28 05:16:30z dungvnguyen $
 * @since 1.0
 */
@JsonInclude(JsonInclude.Include.NON_EMPTY)
public abstract class QTestBaseModel> extends PropertyContainer {
  @JsonProperty("links")
  private List links;

  @JsonProperty("web_url")
  private String webUrl;

  /**
   * @return the list of relation's links.
   */
  public List getLinks() {
    if (links == null) {
      return Collections.emptyList();
    }
    return links;
  }

  /**
   * Sets the list of links relation.
   *
   * @param links the given list of relation's links to set.
   * @return current instance.
   */
  public T setLinks(List links) {
    this.links = links;
    return (T) this;
  }

  /**
   * Sets the list of links relation.
   *
   * @param links the given list of relation's links to set.
   * @return the current object.
   */
  public QTestBaseModel withLinks(List links) {
    setLinks(links);
    return this;
  }

  /**
   * @return the URL to access this object via web browser.
   */
  public String getWebUrl() {
    return webUrl;
  }

  /**
   * Sets the object's web URL.
   *
   * @param webUrl the given URL to access object via web browser.
   * @return current instance.
   */
  public T setWebUrl(String webUrl) {
    this.webUrl = webUrl;
    return (T) this;
  }

  /**
   * Sets the object's web URL and return itself.
   *
   * @param webUrl the given URL to access object via web browser.
   * @return the current object.
   */
  public QTestBaseModel withWebUrl(String webUrl) {
    setWebUrl(webUrl);
    return this;
  }

  /**
   * @param content       content
   * @param markedSupport markedSupport
   * @return the {@link InputStream content} as {@link InputStream} input stream.
   * @throws IOException IOException
   */
  protected byte[] getBinaryFromInputStream(InputStream content, boolean markedSupport) throws IOException {
    try {
      content = validateInputStream(content, markedSupport);
      if (markedSupport) content.mark(-1);

      ByteArrayOutputStream output = new ByteArrayOutputStream(1024);

      byte[] buffer = new byte[8096];
      int length;

      while ((length = content.read(buffer)) > -1) {
        output.write(buffer, 0, length);
      }
      output.close();
      if (markedSupport) content.reset();

      return output.toByteArray();
    } catch (Exception ex) {
      throw new IOException("Unable to read input stream: " + ex.getMessage(), ex);
    }
  }

  /**
   * @param content       content
   * @param markSupported markSupported
   * @return InputStream
   * @throws IOException IOException
   */
  protected InputStream validateInputStream(InputStream content, boolean markSupported) throws IOException {
    try {
      if (content == null) return new ByteArrayInputStream(new byte[0]);
      if (content instanceof StringInputStream) return content;
      if (markSupported && !content.markSupported()) {
        throw new IOException("Unable to read input stream. Not support mark/reset.");
      }
      return content;
    } catch (Exception ex) {
      Throwables.propagateIfInstanceOf(ex, IOException.class);
      throw new IOException("Unable to read input stream: " + ex.getMessage(), ex);
    }
  }
}