Examples of com.db4o.query.Query.constrain()

com.db4o.query.Query.constrain()
adds a constraint to this node.

If the constraint contains attributes that are not yet present in the query graph, the query graph is extended accordingly.

Special behaviour for:
- class {@link Class}: confine the result to objects of one class or to objects implementing an interface.
- interface {@link Evaluation}: run evaluation callbacks against all candidates.
@param constraint the constraint to be added to this Query. @return {@link Constraint} a new {@link Constraint} for thisquery node or null for objects implementing the {@link Evaluation} interface.

            break;
          case GREATER_THAN:
            pquery.constrain(checkValue).greater();
            break;
          case GREATER_THAN_EQUALS:
            pquery.constrain(checkValue).greater().equal();
            break;
          case IN: {
            Object[] arr;
            if(checkValue.getClass().isArray()) {
              arr = (Object[]) checkValue;

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                      .getClass().toString());
            }
            Constraint c = null;
            for(final Object o : arr) {
              if(c == null) {
                c = pquery.constrain(o);
              }
              else {
                c.or(pquery.constrain(o));
              }
            }

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            for(final Object o : arr) {
              if(c == null) {
                c = pquery.constrain(o);
              }
              else {
                c.or(pquery.constrain(o));
              }
            }
            break;
          }
          case IS:

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                  + DBType.class.getSimpleName());
            }
            final DBType dbType = (DBType) checkValue;
            if(dbType == DBType.NULL) {
              // null
              pquery.constrain(null);
            }
            else {
              // not null
              pquery.constrain(null).not();
            }

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              // null
              pquery.constrain(null);
            }
            else {
              // not null
              pquery.constrain(null).not();
            }
          case LESS_THAN:
            pquery.constrain(checkValue).smaller();
            break;
          case LESS_THAN_EQUALS:

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            else {
              // not null
              pquery.constrain(null).not();
            }
          case LESS_THAN:
            pquery.constrain(checkValue).smaller();
            break;
          case LESS_THAN_EQUALS:
            pquery.constrain(checkValue).smaller().equal();
            break;
          case LIKE:

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            }
          case LESS_THAN:
            pquery.constrain(checkValue).smaller();
            break;
          case LESS_THAN_EQUALS:
            pquery.constrain(checkValue).smaller().equal();
            break;
          case LIKE:
            pquery.constrain(checkValue).like();
            break;
          case NOT_EQUALS:

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            break;
          case LESS_THAN_EQUALS:
            pquery.constrain(checkValue).smaller().equal();
            break;
          case LIKE:
            pquery.constrain(checkValue).like();
            break;
          case NOT_EQUALS:
            pquery.constrain(checkValue).not();
            break;
          case STARTS_WITH:

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            break;
          case LIKE:
            pquery.constrain(checkValue).like();
            break;
          case NOT_EQUALS:
            pquery.constrain(checkValue).not();
            break;
          case STARTS_WITH:
            pquery.constrain(checkValue).startsWith(ctn.isCaseSensitive());
            break;
          } // comparator switch

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            break;
          case NOT_EQUALS:
            pquery.constrain(checkValue).not();
            break;
          case STARTS_WITH:
            pquery.constrain(checkValue).startsWith(ctn.isCaseSensitive());
            break;
          } // comparator switch
        }
      }
    }

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