DomainModelAssociation.java

/*
 * Copyright 2011 JBoss Inc
 *
 * 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 org.drools.informer;

/**
 * Defines an association between the answer to a Question and a property on a real domain model object instance.
 * 
 * The Tohu built-in rules keeps the model in sync with the answer on the Question.
 * 
 * All the basic Java types are supported. Adapters can be plugged in for custom extensions. (See
 * <code>org.tohu.domain.DomainModelSupport.registerAdapter</code>.)
 * 
 * @author Damon Horrell
 */
public class DomainModelAssociation {

	private String questionId;

	private Object object;

	private String property;

    private String context;

	/**
	 * A copy is kept of the last know answer. This is necessary to determine whether it is the answer that has changed or the
	 * underlying domain model that has changed.
	 */
	private Object lastAnswer;


	public DomainModelAssociation() {
	}

	public DomainModelAssociation(String questionId, Object object, String property) {
		this.questionId = questionId;
		this.object = object;
		this.property = property;
	}


    public DomainModelAssociation(String questionId, String context, Object object, String property) {
		this.questionId = questionId;
        this.context = context;
		this.object = object;
		this.property = property;
	}

	public String getQuestionId() {
		return questionId;
	}

	public void setQuestionId(String questionId) {
		this.questionId = questionId;
	}

	public Object getObject() {
		return object;
	}

	public void setObject(Object object) {
		this.object = object;
	}

	public String getProperty() {
		return property;
	}

	public void setProperty(String property) {
		this.property = property;
	}

	public Object getLastAnswer() {
		return lastAnswer;
	}

	public void setLastAnswer(Object lastAnswer) {
		this.lastAnswer = lastAnswer;
	}

    public String getContext() {
        return context;
    }

    public void setContext(String context) {
        this.context = context;
    }

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;

        DomainModelAssociation that = (DomainModelAssociation) o;

        if (context != null ? !context.equals(that.context) : that.context != null) return false;
        if (object != null ? !object.equals(that.object) : that.object != null) return false;
        if (questionId != null ? !questionId.equals(that.questionId) : that.questionId != null) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = questionId != null ? questionId.hashCode() : 0;
        result = 31 * result + (object != null ? object.hashCode() : 0);
        result = 31 * result + (context != null ? context.hashCode() : 0);
        return result;
    }


    @Override
    public String toString() {
        return "DomainModelAssociation{" +
                "questionId='" + questionId + '\'' +
                ", object=" + object +
                ", property='" + property + '\'' +
                ", context='" + context + '\'' +
                ", lastAnswer=" + lastAnswer +
                '}';
    }
}