Index.java

package org.springframework.roo.addon.dbre.addon.model;

import java.util.LinkedHashSet;
import java.util.Set;

import org.apache.commons.lang3.Validate;

/**
 * Represents an index definition for a table which may be either unique or
 * non-unique.
 * 
 * @author Alan Stewart
 * @since 1.1
 */
public class Index {

  private final Set<IndexColumn> columns = new LinkedHashSet<IndexColumn>();
  private String name;
  private boolean unique;

  /**
   * Constructor
   * 
   * @param name
   */
  Index(final String name) {
    this.name = name;
  }

  public boolean addColumn(final IndexColumn indexColumn) {
    Validate.notNull(indexColumn, "Column required");
    return columns.add(indexColumn);
  }

  @Override
  public boolean equals(final Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (!(obj instanceof Index)) {
      return false;
    }
    final Index other = (Index) obj;
    if (name == null) {
      if (other.name != null) {
        return false;
      }
    } else if (!name.equals(other.name)) {
      return false;
    }
    return true;
  }

  public Set<IndexColumn> getColumns() {
    return columns;
  }

  public String getName() {
    return name;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + (name == null ? 0 : name.hashCode());
    return result;
  }

  public boolean isUnique() {
    return unique;
  }

  public void setName(final String name) {
    this.name = name;
  }

  public void setUnique(final boolean unique) {
    this.unique = unique;
  }

  @Override
  public String toString() {
    return String.format("Index [name=%s, unique=%s, columns=%s]", name, unique, columns);
  }
}