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A client-side Java library to interact with Scalar DL network.

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package com.scalar.dl.client.config;

import static com.google.common.base.Preconditions.checkArgument;

import java.util.Objects;
import javax.annotation.concurrent.Immutable;

@Immutable
public class IdentityConfig {
  private final String certHolderId;
  private final int certVersion;
  private final String cert;
  private final String privateKey;

  private IdentityConfig(IdentityConfig.Builder builder) {
    this.certHolderId = builder.certHolderId;
    this.certVersion = builder.certVersion;
    this.cert = builder.cert;
    this.privateKey = builder.privateKey;
  }

  public String getCertHolderId() {
    return certHolderId;
  }

  public int getCertVersion() {
    return certVersion;
  }

  public String getCert() {
    return cert;
  }

  public String getPrivateKey() {
    return privateKey;
  }

  @Override
  public int hashCode() {
    return Objects.hash(certHolderId, certVersion, cert, privateKey);
  }

  @Override
  public boolean equals(Object o) {
    if (o == this) {
      return true;
    }
    if (!(o instanceof IdentityConfig)) {
      return false;
    }
    IdentityConfig other = (IdentityConfig) o;
    return getCertHolderId().equals(other.getCertHolderId())
        && getCertVersion() == other.getCertVersion()
        && getCert().equals(other.getCert())
        && getPrivateKey().equals(other.getPrivateKey());
  }

  public static IdentityConfig.Builder newBuilder() {
    return new IdentityConfig.Builder();
  }

  public static final class Builder {
    private String certHolderId;
    private int certVersion;
    private String cert;
    private String privateKey;

    Builder() {
      this.certHolderId = null;
      this.certVersion = -1;
      this.cert = null;
      this.privateKey = null;
    }

    public IdentityConfig.Builder certHolderId(String certHolderId) {
      checkArgument(certHolderId != null);
      this.certHolderId = certHolderId;
      return this;
    }

    public IdentityConfig.Builder certVersion(int certVersion) {
      checkArgument(certVersion >= 0);
      this.certVersion = certVersion;
      return this;
    }

    public IdentityConfig.Builder cert(String cert) {
      checkArgument(cert != null);
      this.cert = cert;
      return this;
    }

    public IdentityConfig.Builder privateKey(String privateKey) {
      checkArgument(privateKey != null);
      this.privateKey = privateKey;
      return this;
    }

    public IdentityConfig build() {
      if (certHolderId == null || certVersion < 0 || cert == null || privateKey == null) {
        throw new IllegalArgumentException("Required fields are not given.");
      }
      return new IdentityConfig(this);
    }
  }
}