io.avaje.jsonb.generator.Append Maven / Gradle / Ivy

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package io.avaje.jsonb.generator;

import static io.avaje.jsonb.generator.ProcessingContext.useEnhancedSwitch;

import java.io.IOException;
import java.io.Writer;

/**
 * Helper that wraps a writer with some useful methods to append content.
 */
final class Append {

  private final Writer writer;

  Append(Writer writer) {
    this.writer = writer;
  }

  Append append(String content) {
    try {
      writer.append(content);
      return this;
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  void close() {
    try {
      writer.flush();
      writer.close();
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  Append eol() {
    try {
      writer.append("\n");
      return this;
    } catch (IOException e) {
      throw new RuntimeException(e);
    }
  }

  /**
   * Append content with formatted arguments.
   */
  Append append(String format, Object... args) {
    return append(String.format(format, args));
  }

  public Append appendSwitchCase() {
    return append(useEnhancedSwitch() ? " -> {" : ":");
  }
}