/**
* Copyright 2005 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.workflow.core.node;
import java.util.List;
import org.drools.definition.process.Connection;
import org.drools.workflow.core.impl.NodeImpl;
/**
* Default implementation of a join.
*
* @author <a href="mailto:kris_verlaenen@hotmail.com">Kris Verlaenen</a>
*/
public class Join extends NodeImpl {
public static final int TYPE_UNDEFINED = 0;
/**
* The outgoing connection of a join of this type is triggered
* when all its incoming connections have been triggered.
*/
public static final int TYPE_AND = 1;
/**
* The outgoing connection of a join of this type is triggered
* when one of its incoming connections has been triggered.
*/
public static final int TYPE_XOR = 2;
/**
* The outgoing connection of a join of this type is triggered
* when one of its incoming connections has been triggered. It then
* waits until all other incoming connections have been triggered
* before allowing
*/
public static final int TYPE_DISCRIMINATOR = 3;
/**
* The outgoing connection of a join of this type is triggered
* when n of its incoming connections have been triggered.
*/
public static final int TYPE_N_OF_M = 4;
private static final long serialVersionUID = 510l;
private int type;
private String n;
public Join() {
this.type = TYPE_UNDEFINED;
}
public void setType(final int type) {
this.type = type;
}
public int getType() {
return this.type;
}
public void setN(String n) {
this.n = n;
}
public String getN() {
return n;
}
public void validateAddIncomingConnection(final String type, final Connection connection) {
super.validateAddIncomingConnection(type, connection);
if (!org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
throw new IllegalArgumentException(
"This type of node only accepts default incoming connection type!");
}
}
public void validateAddOutgoingConnection(final String type, final Connection connection) {
super.validateAddOutgoingConnection(type, connection);
if (!org.drools.workflow.core.Node.CONNECTION_DEFAULT_TYPE.equals(type)) {
throw new IllegalArgumentException(
"This type of node only accepts default outgoing connection type!");
}
if (getTo() != null) {
throw new IllegalArgumentException(
"This type of node cannot have more than one outgoing connection");
}
}
}