com.iab.gpp.encoder.segment.HeaderV1CoreSegment Maven / Gradle / Ivy

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package com.iab.gpp.encoder.segment;

import java.util.ArrayList;
import java.util.List;
import com.iab.gpp.encoder.base64.AbstractBase64UrlEncoder;
import com.iab.gpp.encoder.base64.CompressedBase64UrlEncoder;
import com.iab.gpp.encoder.bitstring.BitStringEncoder;
import com.iab.gpp.encoder.datatype.EncodableFibonacciIntegerRange;
import com.iab.gpp.encoder.datatype.EncodableFixedInteger;
import com.iab.gpp.encoder.error.DecodingException;
import com.iab.gpp.encoder.field.EncodableBitStringFields;
import com.iab.gpp.encoder.field.HeaderV1Field;
import com.iab.gpp.encoder.section.HeaderV1;

public class HeaderV1CoreSegment extends AbstractLazilyEncodableSegment {

  private AbstractBase64UrlEncoder base64UrlEncoder = CompressedBase64UrlEncoder.getInstance();
  private BitStringEncoder bitStringEncoder = BitStringEncoder.getInstance();

  public HeaderV1CoreSegment() {
    super();
  }

  public HeaderV1CoreSegment(String encodedString) {
    super();
    this.decode(encodedString);
  }

  @Override
  public List getFieldNames() {
    return HeaderV1Field.HEADER_CORE_SEGMENT_FIELD_NAMES;
  }
  
  @Override
  protected EncodableBitStringFields initializeFields() {
    EncodableBitStringFields fields = new EncodableBitStringFields();
    fields.put(HeaderV1Field.ID, new EncodableFixedInteger(6, HeaderV1.ID));
    fields.put(HeaderV1Field.VERSION, new EncodableFixedInteger(6, HeaderV1.VERSION));
    fields.put(HeaderV1Field.SECTION_IDS, new EncodableFibonacciIntegerRange(new ArrayList<>()));
    return fields;
  }

  @Override
  protected String encodeSegment(EncodableBitStringFields fields) {
    String bitString = bitStringEncoder.encode(fields, getFieldNames());
    String encodedString = base64UrlEncoder.encode(bitString);
    return encodedString;
  }

  @Override
  protected void decodeSegment(String encodedString, EncodableBitStringFields fields) {
    if(encodedString == null || encodedString.isEmpty()) {
      this.fields.reset(fields);
    }
    try {
      String bitString = base64UrlEncoder.decode(encodedString);
      bitStringEncoder.decode(bitString, getFieldNames(), fields);
    } catch (Exception e) {
      throw new DecodingException("Unable to decode HeaderV1CoreSegment '" + encodedString + "'", e);
    }
  }

}