Identifier.java

package org.springframework.roo.addon.jpa.addon.identifier;

import org.apache.commons.lang3.Validate;
import org.springframework.roo.model.JavaSymbolName;
import org.springframework.roo.model.JavaType;

/**
 * Represents an entity identifier. Instances are immutable.
 * 
 * @author Alan Stewart
 * @since 1.1
 */
public class Identifier {

  private final String columnDefinition;
  private final String columnName;
  private final int columnSize;
  private final JavaSymbolName fieldName;
  private final JavaType fieldType;
  private final int scale;

  /**
   * Constructor
   * 
   * @param fieldName required
   * @param fieldType required
   * @param columnName required
   * @param columnSize
   * @param scale
   * @param columnDefinition
   */
  public Identifier(final JavaSymbolName fieldName, final JavaType fieldType,
      final String columnName, final int columnSize, final int scale, final String columnDefinition) {
    Validate.notNull(fieldName, "Field name required");
    Validate.notNull(fieldType, "Field type required");
    Validate.notBlank(columnName, "Column name required");
    this.columnDefinition = columnDefinition;
    this.columnName = columnName;
    this.columnSize = columnSize;
    this.fieldName = fieldName;
    this.fieldType = fieldType;
    this.scale = scale;
  }

  @Override
  public boolean equals(final Object obj) {
    if (this == obj) {
      return true;
    }
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    final Identifier other = (Identifier) obj;
    if (columnDefinition == null) {
      if (other.columnDefinition != null) {
        return false;
      }
    } else if (!columnDefinition.equals(other.columnDefinition)) {
      return false;
    }
    if (columnName == null) {
      if (other.columnName != null) {
        return false;
      }
    } else if (!columnName.equals(other.columnName)) {
      return false;
    }
    if (columnSize != other.columnSize) {
      return false;
    }
    if (fieldName == null) {
      if (other.fieldName != null) {
        return false;
      }
    } else if (!fieldName.equals(other.fieldName)) {
      return false;
    }
    if (fieldType == null) {
      if (other.fieldType != null) {
        return false;
      }
    } else if (!fieldType.equals(other.fieldType)) {
      return false;
    }
    if (scale != other.scale) {
      return false;
    }
    return true;
  }

  public String getColumnDefinition() {
    return columnDefinition;
  }

  public String getColumnName() {
    return columnName;
  }

  public int getColumnSize() {
    return columnSize;
  }

  public JavaSymbolName getFieldName() {
    return fieldName;
  }

  public JavaType getFieldType() {
    return fieldType;
  }

  public int getScale() {
    return scale;
  }

  @Override
  public int hashCode() {
    final int prime = 31;
    int result = 1;
    result = prime * result + (columnDefinition == null ? 0 : columnDefinition.hashCode());
    result = prime * result + (columnName == null ? 0 : columnName.hashCode());
    result = prime * result + columnSize;
    result = prime * result + (fieldName == null ? 0 : fieldName.hashCode());
    result = prime * result + (fieldType == null ? 0 : fieldType.hashCode());
    result = prime * result + scale;
    return result;
  }

  @Override
  public String toString() {
    return String
        .format(
            "Identifier [fieldName=%s, fieldType=%s, columnName=%s, columnSize=%s, scale=%s, columnDefinition=%s]",
            fieldName, fieldType, columnName, columnSize, scale, columnDefinition);
  }
}