State Machine refactor

git-svn-id: https://joinup.ec.europa.eu/svn/pdf-over/trunk@21 174cde9d-5d70-4d2a-aa98-46368bc2aaf7

1 files changed, 77 insertions, 0 deletions

diff --git a/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/State.java b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/State.java
new file mode 100644
index 00000000..305c5033
--- /dev/null
+++ b/pdf-over-gui/src/main/java/at/asit/pdfover/gui/workflow/State.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
+ *
+ * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
+ * the European Commission - subsequent versions of the EUPL (the "Licence");
+ * You may not use this work except in compliance with the Licence.
+ * You may obtain a copy of the Licence at:
+ * http://joinup.ec.europa.eu/software/page/eupl
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the Licence is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the Licence for the specific language governing permissions and
+ * limitations under the Licence.
+ */
+package at.asit.pdfover.gui.workflow;
+
+//Imports
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Base state class 
+ */
+public abstract class State {
+
+	/**
+	 * The StateMachine
+	 */
+	protected StateMachine stateMachine;
+
+	/**
+	 * SFL4J Logger instance
+	 **/
+	@SuppressWarnings("unused")
+	private static final Logger log = LoggerFactory.getLogger(State.class);
+	
+	private State nextState = null;
+	
+	/**
+	 * Default Workflow State constructor
+	 */
+	public State(StateMachine stateMachine) {
+		this.stateMachine = stateMachine;
+		this.nextState = this;
+	}
+	
+	/**
+	 * Gets the next logical state or null if this their is no state transition
+	 * @return the next state (or null)
+	 */
+	public State nextState() {
+		return this.nextState;
+	}
+	
+	/**
+	 * Sets the next logical state
+	 * @param state
+	 */
+	protected void setNextState(State state) {
+		this.nextState = state;
+	}
+	
+	/**
+	 * Perform main logic for this state
+	 * @param stateMachine the state machine
+	 */
+	public abstract void run();
+
+	/**
+	 * Update the state machine
+	 */
+	public void updateStateMachine()
+	{
+		stateMachine.update();
+	}
+}