001: /*
002: The contents of this file are subject to the Common Public Attribution License
003: Version 1.0 (the "License"); you may not use this file except in compliance with
004: the License. You may obtain a copy of the License at
005: http://www.projity.com/license . The License is based on the Mozilla Public
006: License Version 1.1 but Sections 14 and 15 have been added to cover use of
007: software over a computer network and provide for limited attribution for the
008: Original Developer. In addition, Exhibit A has been modified to be consistent
009: with Exhibit B.
010:
011: Software distributed under the License is distributed on an "AS IS" basis,
012: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
013: specific language governing rights and limitations under the License. The
014: Original Code is OpenProj. The Original Developer is the Initial Developer and
015: is Projity, Inc. All portions of the code written by Projity are Copyright (c)
016: 2006, 2007. All Rights Reserved. Contributors Projity, Inc.
017:
018: Alternatively, the contents of this file may be used under the terms of the
019: Projity End-User License Agreeement (the Projity License), in which case the
020: provisions of the Projity License are applicable instead of those above. If you
021: wish to allow use of your version of this file only under the terms of the
022: Projity License and not to allow others to use your version of this file under
023: the CPAL, indicate your decision by deleting the provisions above and replace
024: them with the notice and other provisions required by the Projity License. If
025: you do not delete the provisions above, a recipient may use your version of this
026: file under either the CPAL or the Projity License.
027:
028: [NOTE: The text of this license may differ slightly from the text of the notices
029: in Exhibits A and B of the license at http://www.projity.com/license. You should
030: use the latest text at http://www.projity.com/license for your modifications.
031: You may not remove this license text from the source files.]
032:
033: Attribution Information: Attribution Copyright Notice: Copyright © 2006, 2007
034: Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj,
035: an open source solution from Projity. Attribution URL: http://www.projity.com
036: Graphic Image as provided in the Covered Code as file: openproj_logo.png with
037: alternatives listed on http://www.projity.com/logo
038:
039: Display of Attribution Information is required in Larger Works which are defined
040: in the CPAL as a work which combines Covered Code or portions thereof with code
041: not governed by the terms of the CPAL. However, in addition to the other notice
042: obligations, all copies of the Covered Code in Executable and Source Code form
043: distributed must, as a form of attribution of the original author, include on
044: each user interface screen the "OpenProj" logo visible to all users. The
045: OpenProj logo should be located horizontally aligned with the menu bar and left
046: justified on the top left of the screen adjacent to the File menu. The logo
047: must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it
048: must direct them back to http://www.projity.com.
049: */
050: package com.projity.pm.assignment.functor;
051:
052: import com.projity.algorithm.CalculationVisitor;
053: import com.projity.pm.time.HasStartAndEnd;
054:
055: /**
056: * Will determine the date when a value is achieved. The process is rather tricky since there are fixed costs
057: * to take into account. This fuctor is used when calculating reverse queries.
058: */
059: public class DateAtValueFunctor implements CalculationVisitor {
060: AssignmentFieldClosureCollection childList;
061: double subtotal;
062: double value;
063: long date;
064:
065: public static DateAtValueFunctor getInstance(
066: double value,
067: com.projity.pm.assignment.functor.AssignmentFieldClosureCollection childList) {
068: return new DateAtValueFunctor(value, childList);
069: }
070:
071: /**
072: * Constructor
073: */
074: private DateAtValueFunctor(double value,
075: AssignmentFieldClosureCollection childList) {
076: super ();
077: reset();
078: this .value = value;
079: this .childList = childList;
080: }
081:
082: /* (non-Javadoc)
083: * @see com.projity.algorithm.CalculationVisitor#reset()
084: */
085: public void initialize() {
086: // no need to reset anything
087: }
088:
089: public void reset() {
090: subtotal = 0;
091: value = 0;
092: date = 0;
093: }
094:
095: /**
096: * Increment the subtotal by adding up all child functors. If the value is achieved, calculate the
097: * instant in the range at which it occurs.
098: */
099: public void execute(Object object) {
100: HasStartAndEnd interval = (HasStartAndEnd) object;
101:
102: double sum = childList.getValue();
103: subtotal += sum;
104: //System.out.println("subtotal is " + DurationFormat.format((long)subtotal) + "interval is " + new java.util.Date(interval.getStart()) + new java.util.Date(interval.getEnd()));
105: if (date == 0 && subtotal >= value) {
106: if (value == 0.0) { // take care of degenerate case
107: date = interval.getStart();
108: return;
109: }
110: // if just an instant but the instant has costs that put it over the top, return the instant
111: if (interval.getStart() == interval.getEnd()) {
112: date = interval.getStart();
113: return;
114: }
115:
116: double fixedSum = childList.getFixedValue(); // get fixed only
117: if (subtotal + fixedSum - sum >= value) { // if the fixed cost alone puts it over
118: date = interval.getStart();
119: return;
120: }
121:
122: // figure out the date using a prorated amount of variable cost
123: sum -= fixedSum; // remove any fixed sum
124: double fractionOfDuration = (sum - (subtotal - value))
125: / sum;
126:
127: AssignmentFieldFunctor aNonZeroFunctor = childList
128: .getANonZeroFunctor();
129:
130: long duration = aNonZeroFunctor.getWorkCalendar().compare(
131: interval.getEnd(), interval.getStart(), false);
132: date = aNonZeroFunctor.getWorkCalendar().add(
133: interval.getStart(),
134: (long) (duration * fractionOfDuration), true);
135: }
136:
137: }
138:
139: /**
140: * Get the date which the value occurs. Will be 0 if it never occurs
141: */
142: public long getDate() {
143: return date;
144: }
145:
146: /* (non-Javadoc)
147: * @see com.projity.algorithm.CalculationVisitor#isCumulative()
148: */
149: public boolean isCumulative() {
150: // TODO Auto-generated method stub
151: return false;
152: }
153: }
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