carfield.com.hk

Condition.java

2001-12-26T16:00:00Z

Input.java

2001-12-26T16:00:00Z

State.java

2001-12-26T16:00:00Z

State.py

2001-12-26T16:00:00Z

StateMachine.java

2001-12-26T16:00:00Z

//: c04:statemachine2:StateMachine.java
// A table-driven state machine
package c04.statemachine2;
import java.util.*;

public class StateMachine {
  private State state;
  private Map map = new HashMap();
  public StateMachine(State initial) {
    state = initial;
  }
  public void buildTable(Object[][][] table) {
    for(int i = 0; i < table.length; i++) {
      Object[][] row = table[i];
      Object currentState = row[0][0];
      List transitions = new ArrayList();
      for(int j = 1; j < row.length; j++)
        transitions.add(row[j]);
      map.put(currentState, transitions);
    }
  }
  public void nextState(Input input) {
    Iterator it=((List)map.get(state)).iterator();
    while(it.hasNext()) {
      Object[] tran = (Object[])it.next();
      if(input == tran[0] || 
         input.getClass() == tran[0]) {
        if(tran[1] != null) {
          Condition c = (Condition)tran[1];
          if(!c.condition(input))
            continue; // Failed test
        }
        if(tran[2] != null)
          ((Transition)tran[2]).transition(input);
        state = (State)tran[3];
        return;
      }
    }
    throw new RuntimeException(
      "Input not supported for current state");
  }
} ///:~

StateMachine.py

2001-12-26T16:00:00Z

Transition.java

2001-12-26T16:00:00Z

makefile

2001-12-26T16:00:00Z

# From Thinking in Patterns (with Java) by Bruce Eckel
# At http://www.BruceEckel.com
# (c)2001 Bruce Eckel 
# Copyright notice in Copyright.txt
# Automatically-generated MAKEFILE 
# For examples in directory .\c04\statemachine2
# using the JDK 1.3 compiler
# Invoke with: make

HOME := ../../

ifndef MAKECMDGOALS
MAKECMDGOALS := javac
endif

# Command.com is too weak to build this under Windows NT/2000:
ifeq ($(OS),Windows_NT)
COMSPEC=$(SYSTEMROOT)\system32\cmd.exe
endif

ifneq ($(MAKECMDGOALS),clean)
include $(HOME)/$(MAKECMDGOALS).mac
endif

.SUFFIXES : .class .java
.java.class :
	$(JVC) $(JVCFLAGS) $<

javac: \
	State.class \
	Input.class \
	Condition.class \
	Transition.class \
	StateMachine.class

jikes: \
	State.class \
	Input.class \
	Condition.class \
	Transition.class \
	StateMachine.class

clean:
ifeq ($(notdir $(SHELL)),COMMAND.COM)
	del *.class
else
	rm -f *.class
endif


State.class: State.java 

Input.class: Input.java 

Condition.class: Condition.java 

Transition.class: Transition.java 

StateMachine.class: StateMachine.java