Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/util/script/ScriptElementContainer.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18
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19 package gov.nasa.jpf.util.script;
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20
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21 import java.io.PrintWriter;
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22 import java.util.Iterator;
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23
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24 public abstract class ScriptElementContainer extends ScriptElement implements Iterable <ScriptElement> {
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25
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26 protected class SECIterator implements Iterator<ScriptElement>, Cloneable {
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27
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28 SECIterator prev; // to build ad hoc stacks
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29 ScriptElement cur;
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30
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31 SECIterator () {
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32 cur = firstChild;
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33 }
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34
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35 @Override
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36 public boolean hasNext() {
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37 return (cur != null);
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38 }
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39
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40 @Override
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41 public ScriptElement next() {
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42 if (cur != null) {
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43 ScriptElement ret = cur;
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44 cur = cur.nextSibling;
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45 return ret;
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46 } else {
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47 return null;
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48 }
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49 }
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50
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51 @Override
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52 public void remove() {
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53 throw new UnsupportedOperationException("no ScriptElement removal supported");
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54 }
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55
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56 public SECIterator getPrev() {
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57 return prev;
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58 }
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59
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60 public void setPrev (SECIterator it) {
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61 prev = it;
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62 }
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63
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64 @Override
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65 public Object clone() {
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66 try {
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67 // need to deep copy iterators
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68 SECIterator it = (SECIterator)super.clone();
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69 if (prev != null) {
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70 it.prev = (SECIterator) prev.clone();
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71 }
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72 return it;
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73 } catch (CloneNotSupportedException cnsx) {
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74 return null; // can't happen, just compiler pleasing
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75 }
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76 }
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77 }
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78
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79
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80 ScriptElement firstChild;
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81
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82 ScriptElementContainer (ScriptElement parent, int line) {
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83 super(parent, line);
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84 }
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85
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86 public ScriptElement getFirstChild () {
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87 return firstChild;
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88 }
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89
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90 /**
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91 * beware, this sets the nextSibling
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92 */
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93 public void add (ScriptElement e) {
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94 e.nextSibling = null;
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95
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96 if (firstChild == null) {
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97 firstChild = e;
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98 } else {
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99 ScriptElement p=firstChild;
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100 while (p.nextSibling != null) p=p.nextSibling;
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101 p.nextSibling = e;
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102 }
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103 }
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104
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105 public int getNumberOfChildren() {
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106 int n=0;
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107 ScriptElement e = firstChild;
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108 while (e != null) {
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109 n++;
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110 e = e.getNextSibling();
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111 }
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112 return n;
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113 }
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114
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115 @Override
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116 public SECIterator iterator () {
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117 return new SECIterator();
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118 }
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119
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120 void dump (PrintWriter w, int level, ScriptElement elem) {
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121
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122 try {
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123 while (elem != null) {
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124 for (int i=0; i<level; i++) {
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125 w.print(" ");
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126 }
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127 w.print(elem);
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128
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129 if (elem instanceof ScriptElementContainer) {
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130 ScriptElementContainer c = (ScriptElementContainer) elem;
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131 w.println(" {");
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132 dump(w, level+1, c.getFirstChild());
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133 for (int i=0; i<level; i++) {
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134 w.print(" ");
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135 }
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136 w.println("}");
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137 } else {
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138 w.println();
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139 }
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140
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141 elem = elem.getNextSibling();
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142 }
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143 }
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144 catch (Throwable t) {
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145 t.printStackTrace();
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146 }
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147 }
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148
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149 protected String toString (String type) {
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150 StringBuilder sb = new StringBuilder();
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151
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152 if (type != null) {
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153 sb.append(type);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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154 sb.append(' ');
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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155 }
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156
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157 sb.append("{");
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158 int i=0;
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159 for (ScriptElement e = firstChild; e != null; e = e.nextSibling) {
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160 if (i++ > 0) {
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161 sb.append(',');
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162 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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163 sb.append(e);
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164 }
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165 sb.append("}");
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166 return sb.toString();
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167 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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168
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169 @Override
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170 public String toString() {
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171 return toString(null);
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172 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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173
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174 public void dump (PrintWriter w) {
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175 dump(w, 0, firstChild);
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176 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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177
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178 public void processChildren(ElementProcessor p) {
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179 for (ScriptElement e = firstChild; e != null; e = e.nextSibling) {
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180 e.process(p);
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181 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
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182 }
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183 }