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annotate org.eclipse.core.databinding.beans/src/org/eclipse/core/databinding/beans/PojoObservables.d @ 98:48d4ee626868

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rm databinding.observable seems to be duplicate, databinding.beans now building
author Frank Benoit <benoit@tionex.de>
date Wed, 22 Apr 2009 07:30:21 +0200
parents c86eb8b3098e
children
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1 /*******************************************************************************
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2 * Copyright (c) 2007, 2008 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Matthew Hall - bug 221704
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11 *******************************************************************************/
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12
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13 module org.eclipse.core.databinding.beans.PojoObservables;
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14 import org.eclipse.core.databinding.beans.BeansObservables;
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15
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16 import java.lang.all;
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17
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18 import java.beans.PropertyChangeEvent;
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19 import java.beans.PropertyDescriptor;
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20
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21 import org.eclipse.core.databinding.observable.IObservable;
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22 import org.eclipse.core.databinding.observable.Realm;
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23 import org.eclipse.core.databinding.observable.list.IObservableList;
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24 import org.eclipse.core.databinding.observable.map.IObservableMap;
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25 import org.eclipse.core.databinding.observable.masterdetail.IObservableFactory;
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26 import org.eclipse.core.databinding.observable.masterdetail.MasterDetailObservables;
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27 import org.eclipse.core.databinding.observable.set.IObservableSet;
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28 import org.eclipse.core.databinding.observable.value.IObservableValue;
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29 import org.eclipse.core.internal.databinding.beans.BeanObservableListDecorator;
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30 import org.eclipse.core.internal.databinding.beans.BeanObservableMapDecorator;
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31 import org.eclipse.core.internal.databinding.beans.BeanObservableSetDecorator;
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32 import org.eclipse.core.internal.databinding.beans.BeanObservableValueDecorator;
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33 import org.eclipse.core.internal.databinding.beans.JavaBeanObservableList;
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34 import org.eclipse.core.internal.databinding.beans.JavaBeanObservableMap;
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35 import org.eclipse.core.internal.databinding.beans.JavaBeanObservableSet;
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36 import org.eclipse.core.internal.databinding.beans.JavaBeanObservableValue;
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37 import org.eclipse.core.internal.databinding.beans.JavaBeanPropertyObservableMap;
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38
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39 /**
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40 * A factory for creating observable objects for POJOs (plain old java objects)
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41 * that conform to idea of an object with getters and setters but does not
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42 * provide {@link PropertyChangeEvent property change events} on change. This
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43 * factory is identical to {@link BeansObservables} except for this fact.
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44 *
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45 * @since 1.1
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46 */
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47 final public class PojoObservables {
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48
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49 /**
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50 * Returns an observable value in the default realm tracking the current
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51 * value of the named property of the given pojo.
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52 *
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53 * @param pojo
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54 * the object
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55 * @param propertyName
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56 * the name of the property
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57 * @return an observable value tracking the current value of the named
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58 * property of the given pojo
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59 */
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60 public static IObservableValue observeValue(Object pojo, String propertyName) {
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61 return observeValue(Realm.getDefault(), pojo, propertyName);
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62 }
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63
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64 /**
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65 * Returns an observable value in the given realm tracking the current value
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66 * of the named property of the given pojo.
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67 *
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68 * @param realm
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69 * the realm
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70 * @param pojo
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71 * the object
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72 * @param propertyName
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73 * the name of the property
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74 * @return an observable value tracking the current value of the named
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75 * property of the given pojo
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76 */
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77 public static IObservableValue observeValue(Realm realm, Object pojo,
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78 String propertyName) {
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79
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80 PropertyDescriptor descriptor = BeansObservables.getPropertyDescriptor(
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81 Class.fromObject(pojo), propertyName);
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82 return new JavaBeanObservableValue(realm, pojo, descriptor, false);
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83 }
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84
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85 /**
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86 * Returns an observable map in the default realm tracking the current
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87 * values of the named property for the pojos in the given set.
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88 *
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89 * @param domain
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90 * the set of pojo objects
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91 * @param pojoClass
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92 * the common base type of pojo objects that may be in the set
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93 * @param propertyName
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94 * the name of the property
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95 * @return an observable map tracking the current values of the named
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96 * property for the pojos in the given domain set
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97 */
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98 public static IObservableMap observeMap(IObservableSet domain,
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99 Class pojoClass, String propertyName) {
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100 PropertyDescriptor descriptor = BeansObservables.getPropertyDescriptor(
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101 pojoClass, propertyName);
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102 return new JavaBeanObservableMap(domain, descriptor, false);
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103 }
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104
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105 /**
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106 * Returns an array of observable maps in the default realm tracking the
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107 * current values of the named propertys for the pojos in the given set.
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108 *
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109 * @param domain
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110 * the set of objects
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111 * @param pojoClass
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112 * the common base type of objects that may be in the set
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113 * @param propertyNames
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114 * the array of property names
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115 * @return an array of observable maps tracking the current values of the
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116 * named propertys for the pojos in the given domain set
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117 */
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118 public static IObservableMap[] observeMaps(IObservableSet domain,
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119 Class pojoClass, String[] propertyNames) {
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120 IObservableMap[] result = new IObservableMap[propertyNames.length];
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121 for (int i = 0; i < propertyNames.length; i++) {
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122 result[i] = observeMap(domain, pojoClass, propertyNames[i]);
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123 }
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124 return result;
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125 }
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126
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127 /**
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128 * Returns an observable map in the given realm tracking the map-typed named
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129 * property of the given pojo object.
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130 *
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131 * @param realm
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132 * the realm
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133 * @param pojo
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134 * the pojo object
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135 * @param propertyName
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136 * the name of the property
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137 * @return an observable map tracking the map-typed named property of the
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138 * given pojo object
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139 */
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140 public static IObservableMap observeMap(Realm realm, Object pojo,
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141 String propertyName) {
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142 PropertyDescriptor descriptor = BeansObservables.getPropertyDescriptor(
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143 Class.fromObject(pojo), propertyName);
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144 return new JavaBeanPropertyObservableMap(realm, pojo, descriptor, false);
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145 }
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146
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147 /**
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148 * Returns an observable list in the given realm tracking the
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149 * collection-typed named property of the given pojo object. The returned
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150 * list is mutable.
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151 *
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152 * @param realm
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153 * the realm
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154 * @param pojo
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155 * the object
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156 * @param propertyName
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157 * the name of the collection-typed property
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158 * @return an observable list tracking the collection-typed named property
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159 * of the given pojo object
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160 * @see #observeList(Realm, Object, String, Class)
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161 */
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162 public static IObservableList observeList(Realm realm, Object pojo,
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163 String propertyName) {
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164 return observeList(realm, pojo, propertyName, null);
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165 }
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166
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167 /**
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168 * Returns an observable list in the given realm tracking the
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169 * collection-typed named property of the given bean object. The returned
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170 * list is mutable. When an item is added or removed the setter is invoked
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171 * for the list on the parent bean to provide notification to other
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172 * listeners via <code>PropertyChangeEvents</code>. This is done to
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173 * provide the same behavior as is expected from arrays as specified in the
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174 * bean spec in section 7.2.
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175 *
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176 * @param realm
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177 * the realm
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178 * @param pojo
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179 * the bean object
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180 * @param propertyName
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181 * the name of the property
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182 * @param elementType
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183 * type of the elements in the list. If <code>null</code> and
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184 * the property is an array the type will be inferred. If
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185 * <code>null</code> and the property type cannot be inferred
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186 * element type will be <code>null</code>.
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187 * @return an observable list tracking the collection-typed named property
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188 * of the given bean object
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189 */
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190 public static IObservableList observeList(Realm realm, Object pojo,
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191 String propertyName, Class elementType) {
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192 PropertyDescriptor propertyDescriptor = BeansObservables
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193 .getPropertyDescriptor(Class.fromObject(pojo), propertyName);
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194 elementType = BeansObservables.getCollectionElementType(elementType,
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195 propertyDescriptor);
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196
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197 return new JavaBeanObservableList(realm, pojo, propertyDescriptor,
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198 elementType, false);
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199 }
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200
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201 /**
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202 * Returns an observable set in the given realm tracking the
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203 * collection-typed named property of the given pojo object.
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204 *
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205 * @param realm
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206 * the realm
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207 * @param pojo
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208 * the pojo object
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209 * @param propertyName
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210 * the name of the property
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211 * @return an observable set tracking the collection-typed named property of
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212 * the given pojo object
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213 */
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214 public static IObservableSet observeSet(Realm realm, Object pojo,
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215 String propertyName) {
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216 return observeSet(realm, pojo, propertyName, null);
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217 }
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218
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219 /**
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220 * @param realm
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221 * @param pojo
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222 * @param propertyName
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223 * @param elementType
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224 * can be <code>null</code>
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225 * @return an observable set that tracks the current value of the named
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226 * property for given pojo object
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227 */
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228 public static IObservableSet observeSet(Realm realm, Object pojo,
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229 String propertyName, Class elementType) {
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230 PropertyDescriptor propertyDescriptor = BeansObservables
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231 .getPropertyDescriptor(Class.fromObject(pojo), propertyName);
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232 elementType = BeansObservables.getCollectionElementType(elementType,
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233 propertyDescriptor);
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234
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235 return new JavaBeanObservableSet(realm, pojo, propertyDescriptor,
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236 elementType, false);
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237 }
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238
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239 /**
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240 * Returns a factory for creating obervable values tracking the given
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241 * property of a particular pojo object
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242 *
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243 * @param realm
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244 * the realm to use
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245 * @param propertyName
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246 * the name of the property
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247 * @return an observable value factory
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248 */
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249 public static IObservableFactory valueFactory(Realm realm,
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250 String propertyName) {
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251 return new class(realm, propertyName) IObservableFactory {
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252 Realm realm_;
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253 String propertyName_;
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254 this(Realm r, String p){
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255 realm_=r;
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256 propertyName_=p;
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257 }
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258 public IObservable createObservable(Object target) {
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259 return observeValue(realm_, target, propertyName_);
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260 }
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261 };
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262 }
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263
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264 /**
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265 * Returns a factory for creating obervable lists tracking the given
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266 * property of a particular pojo object
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267 *
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268 * @param realm
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269 * the realm to use
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270 * @param propertyName
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271 * the name of the property
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272 * @param elementType
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273 * @return an observable list factory
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274 */
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275 public static IObservableFactory listFactory(Realm realm,
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276 String propertyName, Class elementType) {
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277 return new class(realm, propertyName, elementType) IObservableFactory {
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278 Realm realm_;
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279 String propertyName_;
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280 Class elementType_;
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281 this(Realm r, String p, Class e){
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282 realm_=r;
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283 propertyName_=p;
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284 elementType_=e;
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285 }
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286 public IObservable createObservable(Object target) {
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287 return observeList(realm_, target, propertyName_, elementType_);
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288 }
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289 };
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290 }
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291
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292 /**
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293 * Returns a factory for creating obervable sets tracking the given property
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294 * of a particular pojo object
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295 *
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296 * @param realm
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297 * the realm to use
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298 * @param propertyName
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299 * the name of the property
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300 * @return an observable set factory
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301 */
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302 public static IObservableFactory setFactory(Realm realm,
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303 String propertyName) {
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304 return new class(realm, propertyName) IObservableFactory {
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305 Realm realm_;
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306 String propertyName_;
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307 this(Realm r, String p){
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308 realm_=r;
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309 propertyName_=p;
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310 }
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311 public IObservable createObservable(Object target) {
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312 return observeSet(realm_, target, propertyName_);
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313 }
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314 };
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315 }
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316
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317 /**
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318 * @param realm
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319 * @param propertyName
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320 * @param elementType
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321 * can be <code>null</code>
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322 * @return an observable set factory for creating observable sets
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323 */
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324 public static IObservableFactory setFactory(Realm realm,
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325 String propertyName, Class elementType) {
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326 return new class(realm, propertyName, elementType) IObservableFactory {
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327 Realm realm_;
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328 String propertyName_;
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329 Class elementType_;
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330 this(Realm r, String p, Class e){
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331 realm_=r;
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332 propertyName_=p;
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333 elementType_=e;
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334 }
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335 public IObservable createObservable(Object target) {
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336 return observeSet(realm_, target, propertyName_, elementType_);
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337 }
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338 };
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339 }
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340
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341 /**
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342 * Returns a factory for creating an observable map. The factory, when
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343 * provided with a pojo object, will create an {@link IObservableMap} in the
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344 * given realm that tracks the map-typed named property for the specified
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345 * pojo.
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346 *
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347 * @param realm
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348 * the realm assigned to observables created by the returned
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349 * factory.
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350 * @param propertyName
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351 * the name of the property
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352 * @return a factory for creating {@link IObservableMap} objects.
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353 */
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354 public static IObservableFactory mapPropertyFactory(Realm realm,
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355 String propertyName) {
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356 return new class(realm, propertyName) IObservableFactory {
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357 Realm realm_;
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358 String propertyName_;
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359 this(Realm r, String p){
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360 realm_=r;
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361 propertyName_=p;
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362 }
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363 public IObservable createObservable(Object target) {
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364 return observeMap(realm_, target, propertyName_);
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365 }
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366 };
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367 }
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368
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369 /**
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370 * Helper method for
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371 * <code>MasterDetailObservables.detailValue(master, valueFactory(realm,
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372 propertyName), propertyType)</code>
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373 *
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374 * @param realm
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375 * @param master
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376 * @param propertyName
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377 * @param propertyType
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378 * can be <code>null</code>
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379 * @return an observable value that tracks the current value of the named
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380 * property for the current value of the master observable value
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381 *
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382 * @see MasterDetailObservables
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383 */
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384 public static IObservableValue observeDetailValue(Realm realm,
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385 IObservableValue master, String propertyName, Class propertyType) {
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386
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387 IObservableValue value = MasterDetailObservables.detailValue(master,
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388 valueFactory(realm, propertyName), propertyType);
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389 BeanObservableValueDecorator decorator = new BeanObservableValueDecorator(
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390 value, master, BeansObservables.getValueTypePropertyDescriptor(
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391 master, propertyName));
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392
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393 return decorator;
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394 }
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395
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396 /**
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397 * Helper method for
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398 * <code>MasterDetailObservables.detailList(master, listFactory(realm,
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399 propertyName, propertyType), propertyType)</code>
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400 *
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401 * @param realm
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402 * @param master
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403 * @param propertyName
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404 * @param propertyType
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405 * can be <code>null</code>
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406 * @return an observable list that tracks the named property for the current
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407 * value of the master observable value
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408 *
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409 * @see MasterDetailObservables
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410 */
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411 public static IObservableList observeDetailList(Realm realm,
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412 IObservableValue master, String propertyName, Class propertyType) {
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413 IObservableList observableList = MasterDetailObservables.detailList(
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414 master, listFactory(realm, propertyName, propertyType),
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415 propertyType);
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416 BeanObservableListDecorator decorator = new BeanObservableListDecorator(
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417 observableList, cast(Object)master, BeansObservables
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418 .getValueTypePropertyDescriptor(master, propertyName));
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419
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420 return decorator;
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421 }
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422
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423 /**
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424 * Helper method for
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425 * <code>MasterDetailObservables.detailSet(master, setFactory(realm,
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426 propertyName), propertyType)</code>
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427 *
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428 * @param realm
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429 * @param master
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430 * @param propertyName
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431 * @param propertyType
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432 * can be <code>null</code>
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433 * @return an observable set that tracks the named property for the current
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434 * value of the master observable value
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435 *
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436 * @see MasterDetailObservables
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437 */
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438 public static IObservableSet observeDetailSet(Realm realm,
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439 IObservableValue master, String propertyName, Class propertyType) {
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440
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441 IObservableSet observableSet = MasterDetailObservables.detailSet(
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442 master, setFactory(realm, propertyName, propertyType),
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443 propertyType);
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444 BeanObservableSetDecorator decorator = new BeanObservableSetDecorator(
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445 observableSet, cast(Object)master, BeansObservables
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446 .getValueTypePropertyDescriptor(master, propertyName));
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447
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448 return decorator;
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449 }
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450
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451 /**
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452 * Helper method for
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453 * <code>MasterDetailObservables.detailMap(master, mapFactory(realm, propertyName))</code>
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454 *
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455 * @param realm
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456 * @param master
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457 * @param propertyName
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458 * @return an observable map that tracks the map-type named property for the
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459 * current value of the master observable value.
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460 */
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461 public static IObservableMap observeDetailMap(Realm realm,
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462 IObservableValue master, String propertyName) {
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463 IObservableMap observableMap = MasterDetailObservables.detailMap(
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464 master, mapPropertyFactory(realm, propertyName));
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465 BeanObservableMapDecorator decorator = new BeanObservableMapDecorator(
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466 observableMap, cast(Object)master, BeansObservables
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467 .getValueTypePropertyDescriptor(master, propertyName));
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468 return decorator;
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469 }
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470 }