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package org.activiti.engine.impl.interceptor;

import org.activiti.engine.impl.cfg.TransactionPropagation;

/**
 * Configuration settings for the command interceptor chain.
 * 
 * Instances of this class are immutable, and thus thread- and share-safe.
 * 

 */
public class CommandConfig {

  private boolean contextReusePossible;
  private TransactionPropagation propagation;

  public CommandConfig() {
    this.contextReusePossible = true;
    this.propagation = TransactionPropagation.REQUIRED;
  }

  public CommandConfig(boolean contextReusePossible) {
    this.contextReusePossible = contextReusePossible;
    this.propagation = TransactionPropagation.REQUIRED;
  }
  
  public CommandConfig(boolean contextReusePossible, TransactionPropagation transactionPropagation) {
    this.contextReusePossible = contextReusePossible;
    this.propagation = transactionPropagation;
  }

  protected CommandConfig(CommandConfig commandConfig) {
    this.contextReusePossible = commandConfig.contextReusePossible;
    this.propagation = commandConfig.propagation;
  }

  public boolean isContextReusePossible() {
    return contextReusePossible;
  }

  public TransactionPropagation getTransactionPropagation() {
    return propagation;
  }

  public CommandConfig setContextReusePossible(boolean contextReusePossible) {
    CommandConfig config = new CommandConfig(this);
    config.contextReusePossible = contextReusePossible;
    return config;
  }

  public CommandConfig transactionRequired() {
    CommandConfig config = new CommandConfig(this);
    config.propagation = TransactionPropagation.REQUIRED;
    return config;
  }

  public CommandConfig transactionRequiresNew() {
    CommandConfig config = new CommandConfig();
    config.contextReusePossible = false;
    config.propagation = TransactionPropagation.REQUIRES_NEW;
    return config;
  }

  public CommandConfig transactionNotSupported() {
    CommandConfig config = new CommandConfig();
    config.contextReusePossible = false;
    config.propagation = TransactionPropagation.NOT_SUPPORTED;
    return config;
  }
}