content: /**
   * Copyright (C) 2012 the original author or authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package co.jirm.orm.builder;
  
  import static co.jirm.core.util.JirmPrecondition.check;
  import co.jirm.orm.builder.Condition.CombineType;
  
  
  public abstract class AbstractField<T extends Condition<T>> {
  	protected final String propertyPath;
  	private final T condition;
  	private final CombineType combineType;
  	
  	protected AbstractField(String propertyPath, T condition, CombineType combineType) {
  		super();
  		check.argument(propertyPath != null && 
  				! propertyPath.trim().isEmpty(), "propertyPath should not be null or blank");
  		this.propertyPath = propertyPath;
  		this.condition = condition;
  		this.combineType = combineType;
  	}
  
  	public T eq(Object o) {
  		return op("=", o);
  	}
  	
  	public T notEq(Object o) {
  		return op("!=", o);
  	}
  	
  	public T greaterThen(Object o) {
  		return op(">", o);
  	}
  	
  	public T greaterThenEq(Object o) {
  		return op(">=", o);
  	}
  	
  	public T lessThen(Object o) {
  		return op("<", o);
  	}
  	
  	public T lessThenEq(Object o) {
  		return op("<=", o);
  	}
  	
  	public T isNull() {
  		return doAndOr("IS NULL");
  	}
  	
  	public T isNotNull() {
  		return doAndOr("IS NOT NULL");
  	}
  	
  	public T op(String op, Object o) {
  		return doAndOr(sqlPath() + " " + op + " ?", o);
  	}
  	
  	protected abstract String sqlPath();
  
  	private T doAndOr(String s, Object o) {
  		check.argument(o != null, "parameter object should not be null");
  		check.argument(s != null, "operator should not be null");
  		if (combineType == CombineType.AND) {
  			return condition.and(s).with(o);
  		}
  		else {
  			return condition.or(s).with(o);
  		}
  	}
  	
  	private T doAndOr(String s) {
  		check.argument(s != null, "operator should not be null");
  		if (combineType == CombineType.AND) {
  			return condition.and(s);
  		}
  		else {
  			return condition.or(s);
  		}
  	}
  }
  