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/*
 * Copyright 2004-2014 H2 Group. Multiple-Licensed under the MPL 2.0,
 * and the EPL 1.0 (http://h2database.com/html/license.html).
 * Initial Developer: H2 Group
 */
package studio.raptor.sqlparser.fast.value;

import java.sql.PreparedStatement;
import java.sql.SQLException;

/**
 * Implementation of the BOOLEAN data type.
 */
public class ValueBoolean extends Value {

  /**
   * The precision in digits.
   */
  public static final int PRECISION = 1;

  /**
   * The maximum display size of a boolean.
   * Example: FALSE
   */
  public static final int DISPLAY_SIZE = 5;

  /**
   * Of type Object so that Tomcat doesn't set it to null.
   */
  private static final Object TRUE = new ValueBoolean(true);
  private static final Object FALSE = new ValueBoolean(false);

  private final Boolean value;

  private ValueBoolean(boolean value) {
    this.value = Boolean.valueOf(value);
  }

  /**
   * Get the boolean value for the given boolean.
   *
   * @param b the boolean
   * @return the value
   */
  public static ValueBoolean get(boolean b) {
    return (ValueBoolean) (b ? TRUE : FALSE);
  }

  @Override
  public int getType() {
    return Value.BOOLEAN;
  }

  @Override
  public String getSQL() {
    return getString();
  }

  @Override
  public String getString() {
    return value.booleanValue() ? "TRUE" : "FALSE";
  }

  @Override
  public Value negate() {
    return (ValueBoolean) (value.booleanValue() ? FALSE : TRUE);
  }

  @Override
  public Boolean getBoolean() {
    return value;
  }

  @Override
  protected int compareSecure(Value o, CompareMode mode) {
    boolean v2 = ((ValueBoolean) o).value.booleanValue();
    boolean v = value.booleanValue();
    return (v == v2) ? 0 : (v ? 1 : -1);
  }

  @Override
  public long getPrecision() {
    return PRECISION;
  }

  @Override
  public int hashCode() {
    return value.booleanValue() ? 1 : 0;
  }

  @Override
  public Object getObject() {
    return value;
  }

  @Override
  public void set(PreparedStatement prep, int parameterIndex)
      throws SQLException {
    prep.setBoolean(parameterIndex, value.booleanValue());
  }

  @Override
  public int getDisplaySize() {
    return DISPLAY_SIZE;
  }

  @Override
  public boolean equals(Object other) {
    // there are only ever two instances, so the instance must match
    return this == other;
  }

}