CustomDataBuilder.java

package org.springframework.roo.model;

import java.util.Collection;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Set;

/**
 * Builder for {@link CustomData}.
 * <p>
 * Can be used to create new instances from scratch, or based on an existing
 * {@link CustomData} instance.
 * 
 * @author Ben Alex
 * @since 1.1
 */
public class CustomDataBuilder implements Builder<CustomData> {

  private final Map<Object, Object> customData = new LinkedHashMap<Object, Object>();

  /**
   * Constructor for an empty builder
   */
  public CustomDataBuilder() {}

  /**
   * Constructor for a builder initialised with the given contents
   * 
   * @param existing can be <code>null</code>
   */
  public CustomDataBuilder(final CustomData existing) {
    append(existing);
  }

  /**
   * Appends the given custom data to this builder
   * 
   * @param customData the custom data to append; can be <code>null</code> to
   *            make no changes
   */
  public void append(final CustomData customData) {
    if (customData != null) {
      for (final Object key : customData.keySet()) {
        this.customData.put(key, customData.get(key));
      }
    }
  }

  public CustomData build() {
    return new CustomDataImpl(customData);
  }

  public void clear() {
    customData.clear();
  }

  public Object get(final Object key) {
    return customData.get(key);
  }

  public Set<Object> keySet() {
    return customData.keySet();
  }

  public Object put(final Object key, final Object value) {
    return customData.put(key, value);
  }

  public Object remove(final Object key) {
    return customData.remove(key);
  }

  public int size() {
    return customData.size();
  }

  public Collection<Object> values() {
    return customData.values();
  }
}