/*
 * Copyright (c) 2005, 2007 IBM Corporation and others.
 * All rights reserved.   This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *   IBM - initial API and implementation
 *
 * $Id: DecisionNode.java,v 1.4 2007/04/25 17:47:06 khussey Exp $
 */
package org.eclipse.uml2.uml;

import java.util.Map;

import org.eclipse.emf.common.util.DiagnosticChain;

/**
 * <!-- begin-user-doc -->
 * A representation of the model object '<em><b>Decision Node</b></em>'.
 * <!-- end-user-doc -->
 *
 * <!-- begin-model-doc -->
 * A decision node is a control node that chooses between outgoing flows.
 * <!-- end-model-doc -->
 *
 * <p>
 * The following features are supported:
 * <ul>
 *   <li>{@link org.eclipse.uml2.uml.DecisionNode#getDecisionInput <em>Decision Input</em>}</li>
 * </ul>
 * </p>
 *
 * @see org.eclipse.uml2.uml.UMLPackage#getDecisionNode()
 * @model
 * @generated
 */
public interface DecisionNode
		extends ControlNode {

	/**
	 * Returns the value of the '<em><b>Decision Input</b></em>' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * Provides input to guard specifications on edges outgoing from the decision node.
	 * <!-- end-model-doc -->
	 * @return the value of the '<em>Decision Input</em>' reference.
	 * @see #setDecisionInput(Behavior)
	 * @see org.eclipse.uml2.uml.UMLPackage#getDecisionNode_DecisionInput()
	 * @model ordered="false"
	 * @generated
	 */
	Behavior getDecisionInput();

	/**
	 * Sets the value of the '{@link org.eclipse.uml2.uml.DecisionNode#getDecisionInput <em>Decision Input</em>}' reference.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @param value the new value of the '<em>Decision Input</em>' reference.
	 * @see #getDecisionInput()
	 * @generated
	 */
	void setDecisionInput(Behavior value);

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * A decision node has one incoming edge.
	 * true
	 * @param diagnostics The chain of diagnostics to which problems are to be appended.
	 * @param context The cache of context-specific information.
	 * <!-- end-model-doc -->
	 * @model
	 * @generated
	 */
	boolean validateOneIncomingEdge(DiagnosticChain diagnostics,
			Map<Object, Object> context);

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * A decision input behavior has zero or one input parameter and one output parameter. Any input parameter must be the same as or a supertype of the type of object tokens coming along the incoming edge. The behavior cannot have side effects.
	 * true
	 * @param diagnostics The chain of diagnostics to which problems are to be appended.
	 * @param context The cache of context-specific information.
	 * <!-- end-model-doc -->
	 * @model
	 * @generated
	 */
	boolean validateInputParameter(DiagnosticChain diagnostics,
			Map<Object, Object> context);

	/**
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * The edges coming into and out of a decision node must be either all object flows or all control flows.
	 * true
	 * @param diagnostics The chain of diagnostics to which problems are to be appended.
	 * @param context The cache of context-specific information.
	 * <!-- end-model-doc -->
	 * @model
	 * @generated
	 */
	boolean validateEdges(DiagnosticChain diagnostics,
			Map<Object, Object> context);

} // DecisionNode