001 /**
002 *
003 */
004 package org.wdssii.core;
005
006 import java.util.ArrayList;
007 import java.util.List;
008
009 import org.apache.commons.logging.Log;
010 import org.apache.commons.logging.LogFactory;
011 import org.w3c.dom.Element;
012 import org.w3c.dom.NodeList;
013
014 /**
015 * VolumeCoveragePattern from w2config/vcp
016 *
017 * @author lakshman
018 *
019 */
020 public class VCP {
021 private static Log log = LogFactory.getLog(VCP.class);
022
023 private static List<VCP> vcps = new ArrayList<VCP>();
024
025 private int vcp;
026
027 private boolean isNexrad = true;
028
029 private boolean isMultiPRF = false;
030
031 private boolean isClearAir = true;
032
033 private boolean canCache = true;
034
035 private int totalTime = -20;
036
037 private float[] scans;
038
039 private float[] elevations;
040
041 public boolean isClearAir() {
042 return isClearAir;
043 }
044
045 public boolean isMultiPRF() {
046 return isMultiPRF;
047 }
048
049 public boolean isNexrad() {
050 return isNexrad;
051 }
052
053 public int getTotalTime() {
054 return totalTime;
055 }
056
057 public int getVcp() {
058 return vcp;
059 }
060
061 public static VCP getVCP(int vcp) {
062 for (VCP v : vcps) {
063 if (v.vcp == vcp) {
064 return v;
065 }
066 }
067 VCP v = new VCP(vcp);
068 if (v.canCache && v.vcp > 0) {
069 vcps.add(v);
070 }
071 return v;
072 }
073
074 private VCP(int vcp) {
075 try {
076 this.vcp = vcp;
077 Element vcpel = W2Config.getFileElement("vcp/vcp" + vcp);
078 isNexrad = XMLUtil.getBooleanAttribute(vcpel, "isNexrad", true);
079 isMultiPRF = XMLUtil
080 .getBooleanAttribute(vcpel, "isMultiPRF", false);
081 isClearAir = XMLUtil.getBooleanAttribute(vcpel, "isClearAir", true);
082 canCache = XMLUtil.getBooleanAttribute(vcpel, "canCache", true);
083 totalTime = XMLUtil.getIntegerAttribute(vcpel, "totalTime", -20);
084
085 NodeList angleElements = vcpel.getElementsByTagName("angle");
086 scans = new float[angleElements.getLength()];
087 int numElev = 1; // 0th
088 for (int i = 0; i < scans.length; ++i) {
089 Element ang = (Element) angleElements.item(i);
090 scans[i] = Float.parseFloat(ang.getTextContent());
091 if (i > 0 && scans[i] != scans[i - 1]) {
092 ++numElev;
093 }
094 }
095 elevations = new float[numElev];
096 numElev = 0;
097 for (int i = 0; i < scans.length; ++i) {
098 elevations[numElev] = scans[i];
099 if (i > 0 && scans[i] != scans[i - 1]) {
100 ++numElev;
101 }
102 }
103 if (log.isInfoEnabled()) {
104 log.info("Found " + elevations.length + " angles in "
105 + scans.length + " scans for VCP " + vcp);
106 }
107 } catch (Exception e) {
108 log.warn(e);
109 this.vcp = -1;
110 }
111 }
112
113 /** tilt number starts at 1 */
114 public float getElevation(int tilt) {
115 return elevations[tilt - 1];
116 }
117
118 /** tilts are numbers 1,2, ... */
119 public int getLastTilt() {
120 return elevations.length;
121 }
122
123 /** tilts are numbered 1,2, ... */
124 public int getTiltNumber(float elev) {
125 float mindiff = 360;
126 int closest_tilt = 0;
127
128 for (int i = 0; i < elevations.length; ++i) {
129 float diff = Math.abs(elev - elevations[i]);
130 if (diff < mindiff) {
131 mindiff = diff;
132 closest_tilt = i + 1; // tilts are numbered starting at 1
133 }
134 }
135
136 return closest_tilt;
137
138 }
139 }