1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.htmlmonitor; |
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16 | |
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17 | /** |
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18 | * <p> |
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19 | * represents an element of an HTML GUI, i.e. a tag within a web page. |
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20 | * </p> |
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21 | * |
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22 | * @author Patrick Harms |
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23 | */ |
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24 | class HtmlPageElement extends HtmlGUIElement { |
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25 | |
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26 | /** |
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27 | * the document to which the represented tag belongs |
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28 | */ |
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29 | private HtmlDocument document; |
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30 | |
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31 | /** |
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32 | * the parent page element; if null, the document is considered the parent |
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33 | */ |
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34 | private HtmlPageElement parent; |
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35 | |
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36 | /** |
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37 | * the name of the tag represented by this page element. |
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38 | */ |
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39 | private String tagName; |
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40 | |
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41 | /** |
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42 | * the id of the page element inside the DOM. |
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43 | */ |
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44 | private String htmlId; |
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45 | |
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46 | /** |
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47 | * the index of this element regarding all elements with the same tag name in the list of |
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48 | * children of the parent element |
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49 | */ |
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50 | private Integer index; |
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51 | |
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52 | /** |
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53 | * the hash code of this document |
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54 | */ |
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55 | private int hashCode; |
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56 | |
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57 | /** |
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58 | * <p> |
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59 | * instantiates a new element representing a tag in an HTML page |
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60 | * </p> |
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61 | * |
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62 | * @param id the id of the page element |
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63 | * @param document the document to which the represented tag belongs |
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64 | * @param parent the parent page element; if null, the document is considered the parent |
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65 | * @param tagName the name of the represented tag |
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66 | * @param htmlId the id of the tag in the DOM |
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67 | * @param index the index of the represented tag regarding all tags with the same |
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68 | * tag name in the list of children of the parent tag |
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69 | */ |
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70 | HtmlPageElement(String id, |
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71 | HtmlDocument document, |
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72 | HtmlPageElement parent, |
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73 | String tagName, |
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74 | String htmlId, |
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75 | Integer index) |
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76 | { |
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77 | super(id, parent == null ? document : parent); |
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78 | |
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79 | if (document == null) { |
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80 | throw new IllegalArgumentException("document must not be null"); |
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81 | } |
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82 | |
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83 | if (tagName == null) { |
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84 | throw new IllegalArgumentException("tagName must not be null"); |
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85 | } |
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86 | |
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87 | if ((htmlId == null) && (index == null)) { |
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88 | throw new IllegalArgumentException("either one of htmlId and index must not be null"); |
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89 | } |
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90 | |
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91 | this.document = document; |
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92 | this.parent = parent; |
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93 | this.tagName = tagName; |
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94 | this.htmlId = htmlId; |
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95 | this.index = index; |
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96 | |
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97 | this.hashCode = this.document.hashCode() + this.tagName.hashCode() + |
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98 | (this.parent != null ? this.parent.hashCode() : 0) + |
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99 | (this.htmlId != null ? this.htmlId.hashCode() : 0) + |
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100 | (this.index != null ? this.index : 0); |
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101 | } |
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102 | |
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103 | /** |
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104 | * <p> |
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105 | * returns the document to which the represented tag belongs |
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106 | * </p> |
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107 | * |
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108 | * @return the document |
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109 | */ |
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110 | HtmlDocument getDocument() { |
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111 | return document; |
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112 | } |
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113 | |
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114 | /** |
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115 | * <p> |
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116 | * returns the name of the tag represented by this page element. |
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117 | * </p> |
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118 | * |
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119 | * @return the tagName |
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120 | */ |
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121 | String getTagName() { |
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122 | return tagName; |
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123 | } |
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124 | |
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125 | /** |
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126 | * <p> |
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127 | * returns the id of the page element. |
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128 | * </p> |
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129 | * |
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130 | * @return the id |
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131 | */ |
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132 | String getHtmlId() { |
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133 | return htmlId; |
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134 | } |
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135 | |
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136 | /** |
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137 | * <p> |
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138 | * returns the index of this element regarding all elements with the same tag name in the list |
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139 | * of children of the parent element |
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140 | * </p> |
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141 | * |
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142 | * @return the index |
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143 | */ |
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144 | Integer getIndex() { |
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145 | return index; |
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146 | } |
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147 | |
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148 | /** |
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149 | * <p> |
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150 | * calculates and returns the path to the represented page element through the DOM. Includes |
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151 | * the parent path if any. The represented element is included in the path with its tag name |
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152 | * and its id if it has one, or its index. |
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153 | * </p> |
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154 | * |
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155 | * @return as described |
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156 | */ |
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157 | String getDOMPath() { |
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158 | StringBuffer result = new StringBuffer(); |
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159 | if (parent != null) { |
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160 | result.append(parent.getDOMPath()); |
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161 | } |
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162 | |
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163 | result.append("/"); |
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164 | result.append(tagName); |
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165 | |
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166 | if ((htmlId != null) && (!"".equals(htmlId))) { |
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167 | result.append("(htmlId="); |
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168 | result.append(htmlId); |
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169 | result.append(")"); |
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170 | } |
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171 | else { |
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172 | result.append("["); |
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173 | result.append(index); |
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174 | result.append("]"); |
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175 | } |
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176 | |
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177 | return result.toString(); |
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178 | } |
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179 | |
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180 | /* (non-Javadoc) |
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181 | * @see java.lang.Object#equals(java.lang.Object) |
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182 | */ |
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183 | @Override |
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184 | public boolean equals(Object obj) { |
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185 | if (this == obj) { |
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186 | return true; |
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187 | } |
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188 | else if (obj instanceof HtmlPageElement) { |
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189 | return equals((HtmlPageElement) obj); |
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190 | } |
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191 | else { |
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192 | return false; |
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193 | } |
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194 | } |
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195 | |
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196 | /* (non-Javadoc) |
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197 | * @see de.ugoe.cs.autoquest.htmlmonitor.HtmlGUIElement#equals(de.ugoe.cs.autoquest.htmlmonitor.HtmlGUIElement) |
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198 | */ |
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199 | public boolean equals(HtmlPageElement other) { |
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200 | if (this == other) { |
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201 | return true; |
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202 | } |
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203 | |
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204 | return (document.equals(other.document) && tagName.equals(other.tagName) && |
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205 | (parent != null ? parent.equals(other.parent) : other.parent == null) && |
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206 | (htmlId != null ? htmlId.equals(other.htmlId) : other.htmlId == null) && |
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207 | (index != null ? index.equals(other.index) : other.index == null)); |
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208 | } |
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209 | |
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210 | /* (non-Javadoc) |
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211 | * @see java.lang.Object#hashCode() |
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212 | */ |
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213 | @Override |
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214 | public int hashCode() { |
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215 | return hashCode; |
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216 | } |
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217 | |
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218 | } |
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