Source Code Cross Referenced for ReplicaLocation.java in  » Workflow-Engines » pegasus-2.1.0 » org » griphyn » cPlanner » classes » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Workflow Engines » pegasus 2.1.0 » org.griphyn.cPlanner.classes 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * This file or a portion of this file is licensed under the terms of
003:         * the Globus Toolkit Public License, found in file GTPL, or at
004:         * http://www.globus.org/toolkit/download/license.html. This notice must
005:         * appear in redistributions of this file, with or without modification.
006:         *
007:         * Redistributions of this Software, with or without modification, must
008:         * reproduce the GTPL in: (1) the Software, or (2) the Documentation or
009:         * some other similar material which is provided with the Software (if
010:         * any).
011:         *
012:         * Copyright 1999-2004 University of Chicago and The University of
013:         * Southern California. All rights reserved.
014:         */
015:        package org.griphyn.cPlanner.classes;
016:
017:        import org.griphyn.common.catalog.ReplicaCatalogEntry;
018:
019:        import java.util.Collection;
020:        import java.util.Iterator;
021:        import java.util.List;
022:        import java.util.ArrayList;
023:
024:        /**
025:         * A Data Class that associates a LFN with the PFN's. Attributes associated
026:         * with the LFN go here.
027:         *
028:         * @author Karan Vahi
029:         * @author Gaurang Mehta
030:         *
031:         * @version $Revision: 50 $
032:         *
033:         * @see org.griphyn.common.catalog.ReplicaCatalogEntry
034:         */
035:        public class ReplicaLocation extends Data implements  Cloneable {
036:
037:            /**
038:             * The site name that is associated in the case the resource handle is not
039:             * specified with the PFN.
040:             */
041:            public static final String UNDEFINED_SITE_NAME = "UNDEFINED_SITE";
042:
043:            /**
044:             * The LFN associated with the entry.
045:             */
046:            private String mLFN;
047:
048:            /**
049:             * A list of <code>ReplicaCatalogEntry</code> objects containing the PFN's
050:             * and associated attributes.
051:             */
052:            private List mPFNList;
053:
054:            /**
055:             * Default constructor.
056:             */
057:            public ReplicaLocation() {
058:                mLFN = new String();
059:                mPFNList = new ArrayList();
060:            }
061:
062:            /**
063:             * Overloaded constructor.
064:             * Intializes the member variables to the values passed.
065:             *
066:             * @param lfn  the logical filename.
067:             * @paran pfns the list of <code>ReplicaCatalogEntry</code> objects.
068:             */
069:            public ReplicaLocation(String lfn, List pfns) {
070:                mLFN = lfn;
071:                mPFNList = pfns;
072:                //sanitize pfns. add a default resource handle if not specified
073:                sanitize(mPFNList);
074:            }
075:
076:            /**
077:             * Overloaded constructor.
078:             * Intializes the member variables to the values passed.
079:             *
080:             * @param lfn  the logical filename.
081:             * @paran pfns the list of <code>ReplicaCatalogEntry</code> objects.
082:             */
083:            public ReplicaLocation(String lfn, Collection pfns) {
084:                mLFN = lfn;
085:
086:                //create a separate list only if required
087:                mPFNList = (pfns instanceof  List) ? (List) pfns :
088:                //create a new list from the collection
089:                        new ArrayList(pfns);
090:
091:                //sanitize pfns. add a default resource handle if not specified
092:                sanitize(mPFNList);
093:
094:            }
095:
096:            /**
097:             * Add a PFN and it's attributes. Any existing
098:             * mapping with the same PFN will be replaced, including all its
099:             * attributes.
100:             *
101:             * @param tuple  the <code>ReplicaCatalogEntry</code> object containing the
102:             *             PFN and the attributes.
103:             */
104:            public void addPFN(ReplicaCatalogEntry tuple) {
105:                boolean seen = false;
106:                String pfn = tuple.getPFN();
107:
108:                sanitize(tuple);
109:
110:                //traverse through the existing PFN's to check for the
111:                //same pfn
112:                for (Iterator i = this .pfnIterator(); i.hasNext() && !seen;) {
113:                    ReplicaCatalogEntry rce = (ReplicaCatalogEntry) i.next();
114:                    if ((seen = pfn.equals(rce.getPFN()))) {
115:                        try {
116:                            i.remove();
117:                        } catch (UnsupportedOperationException uoe) {
118:                            //ignore for time being
119:                        }
120:                    }
121:                }
122:
123:                this .mPFNList.add(tuple);
124:
125:            }
126:
127:            /**
128:             * Add a PFN and it's attributes.
129:             *
130:             * @param tuples  the <code>List</code> object of <code>ReplicaCatalogEntry</code>
131:             *              objects, each containing the  PFN and the attributes.
132:             */
133:            protected void addPFNs(List tuples) {
134:                for (Iterator it = tuples.iterator(); it.hasNext();) {
135:                    addPFN((ReplicaCatalogEntry) it.next());
136:                }
137:            }
138:
139:            /**
140:             * Sets the LFN.
141:             *
142:             * @param lfn  the lfn.
143:             */
144:            public void setLFN(String lfn) {
145:                this .mLFN = lfn;
146:            }
147:
148:            /**
149:             * Returns the associated LFN.
150:             *
151:             * @return lfn
152:             */
153:            public String getLFN() {
154:                return this .mLFN;
155:            }
156:
157:            /**
158:             * Return a PFN as a <code>ReplicaCatalogEntry</code>
159:             *
160:             * @param index   the pfn location.
161:             *
162:             * @return the element at the specified position in this list.
163:             *
164:             * @throws IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size()).
165:             */
166:            public ReplicaCatalogEntry getPFN(int index) {
167:                return (ReplicaCatalogEntry) this .mPFNList.get(index);
168:            }
169:
170:            /**
171:             * Returns the list of pfn's as <code>ReplicaCatalogEntry</code> objects.
172:             *
173:             * @return List
174:             */
175:            public List getPFNList() {
176:                return this .mPFNList;
177:            }
178:
179:            /**
180:             * Returns an iterator to the list of <code>ReplicaCatalogEntry</code>
181:             * objects.
182:             *
183:             * @return Iterator.
184:             */
185:            public Iterator pfnIterator() {
186:                return this .mPFNList.iterator();
187:            }
188:
189:            /**
190:             * Returns the number of pfn's associated with the lfn.
191:             *
192:             * @return int
193:             */
194:            public int getPFNCount() {
195:                return this .mPFNList.size();
196:            }
197:
198:            /**
199:             * Returns the clone of the object.
200:             *
201:             * @return the clone
202:             */
203:            public Object clone() {
204:                ReplicaLocation rc;
205:                try {
206:                    rc = (ReplicaLocation) super .clone();
207:                } catch (CloneNotSupportedException e) {
208:                    //somewhere in the hierarch chain clone is not implemented
209:                    throw new RuntimeException(
210:                            "Clone not implemented in the base class of "
211:                                    + this .getClass().getName(), e);
212:                }
213:                rc.setLFN(this .mLFN);
214:
215:                //add all the RCE's
216:                for (Iterator it = this .pfnIterator(); it.hasNext();) {
217:                    //rc.addPFN( (( ReplicaCatalogEntry )it.next()).clone() );
218:                }
219:                //clone is not implemented fully.
220:                throw new RuntimeException("Clone not implemented for "
221:                        + this .getClass().getName());
222:
223:                //        return rc;
224:            }
225:
226:            /**
227:             * Merges the <code>ReplicaLocation</code> object to the existing one,
228:             * only if the logical filenames match.
229:             *
230:             * @param location is another <code>ReplicaLocations</code> to merge with.
231:             *
232:             * @return true if a merge was successful, false if the LFNs did not
233:             * match.
234:             */
235:            public boolean merge(ReplicaLocation location) {
236:                String lfn1 = this .getLFN();
237:                String lfn2 = (location == null) ? null : location.getLFN();
238:                boolean result = (lfn1 == null && lfn2 == null || lfn1 != null
239:                        && lfn2 != null && lfn1.equals(lfn2));
240:
241:                // only merge if PFN match
242:                if (result) {
243:                    this .addPFNs(location.getPFNList());
244:                }
245:
246:                return result;
247:            }
248:
249:            /**
250:             * Returns the textual description of the data class.
251:             *
252:             * @return the textual description.
253:             */
254:            public String toString() {
255:                StringBuffer sb = new StringBuffer();
256:                sb.append(mLFN).append(" -> {");
257:                for (Iterator it = this .pfnIterator(); it.hasNext();) {
258:                    sb.append(it.next());
259:                    sb.append(",");
260:                }
261:                sb.append("}");
262:                return sb.toString();
263:            }
264:
265:            /**
266:             * Sanitizes a tuple list . Sets the resource handle to a default value if not
267:             * specified.
268:             *
269:             * @param tuples  the tuple to be sanitized.
270:             */
271:            private void sanitize(List tuples) {
272:                for (Iterator it = tuples.iterator(); it.hasNext();) {
273:                    this .sanitize((ReplicaCatalogEntry) it.next());
274:                }
275:            }
276:
277:            /**
278:             * Sanitizes a tuple . Sets the resource handle to a default value if not
279:             * specified.
280:             *
281:             * @param tuple  the tuple to be sanitized.
282:             */
283:            private void sanitize(ReplicaCatalogEntry tuple) {
284:                //sanity check
285:                if (tuple.getResourceHandle() == null) {
286:                    tuple.setResourceHandle(this.UNDEFINED_SITE_NAME);
287:                }
288:            }
289:        }
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