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annotate src/org/dancres/blitz/BootContext.java @ 0:3dc0c5604566

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Initial checkin of blitz 2.0 fcs - no installer yet.
author Dan Creswell <dan.creswell@gmail.com>
date Sat, 21 Mar 2009 11:00:06 +0000
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3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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1 package org.dancres.blitz;
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2
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Dan Creswell <dan.creswell@gmail.com>
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3 import java.util.List;
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4 import java.util.LinkedList;
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5 import java.util.Iterator;
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6
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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7 /**
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Dan Creswell <dan.creswell@gmail.com>
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8 Various components within Blitz require access to certain specific bits
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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9 of information concerning Boot state. BootContext is responsible for
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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10 holding all these bits of information and making them available to the
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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11 components.
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Dan Creswell <dan.creswell@gmail.com>
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12 */
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Dan Creswell <dan.creswell@gmail.com>
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13 public class BootContext {
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14 private static List theContext = new LinkedList();
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16 public static void add(BootInfo anInfo) {
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Dan Creswell <dan.creswell@gmail.com>
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17 synchronized(theContext) {
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18 theContext.add(anInfo);
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19 }
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Dan Creswell <dan.creswell@gmail.com>
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20 }
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21
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22 public static BootInfo get(Class aClass) {
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23 validate(aClass);
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24
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25 synchronized(theContext) {
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26 Iterator myInfos = theContext.iterator();
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27
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28 while (myInfos.hasNext()) {
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29 BootInfo myInfo = (BootInfo) myInfos.next();
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30
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31 if (aClass.isInstance(myInfo))
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32 return myInfo;
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33 }
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34 }
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35
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36 return null;
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37 }
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38
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Dan Creswell <dan.creswell@gmail.com>
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39 private static void validate(Class aClass) {
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40 Class[] myInterfaces = aClass.getInterfaces();
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41
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42 for (int i = 0 ; i < myInterfaces.length; i++) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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43 if (myInterfaces[i].equals(BootInfo.class))
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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44 return;
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Dan Creswell <dan.creswell@gmail.com>
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45 }
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46
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47 throw new RuntimeException("Attempt to store object which is not a BootInfo");
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48 }
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49 }