Robotium-5.0.1-源代码解析(3)—By

package com.robotium.solo;/** * 提供给操作WebView中的对象使用 *  * Used in conjunction with the web methods. Examples are By.id(String id) and By.cssSelector(String selector). *  * @author Renas Reda, [e-mail] *  */public abstract class By {/** *  构造 Id对象 用于 WebView操作中WebElement的查找 * Select a WebElement by its id. *  * @param id the id of the web element * @return the Id object */public static By id(final String id) {return new Id(id); }/** * 构造Xpath对象用于WebView操作中WebElement的查找 * Select a WebElement by its xpath. *  * @param xpath the xpath of the web element * @return the Xpath object */public static By xpath(final String xpath) {return new Xpath(xpath); }/** * 构造一个CssSelector对象，用于WebView操作中WebElement的查找 * Select a WebElement by its css selector. *  * @param selectors the css selector of the web element * @return the CssSelector object */public static By cssSelector(final String selectors) {return new CssSelector(selectors); }/** * 构造一个 Name对象，用于WebView操作中的WebElement查找 * Select a WebElement by its name. *  * @param name the name of the web element * @return the Name object */public static By name(final String name) {return new Name(name); }/** * 构造一个 ClassName对象，用于WebView操作中的WebElement查找 * Select a WebElement by its class name. *  * @param className the class name of the web element * @return the ClassName object */public static By className(final String className) {return new ClassName(className); }/** * 构造一个 Text对象，用于WebView操作中的WebElement查找 * Select a WebElement by its text content. *  * @param textContent the text content of the web element * @return the TextContent object */public static By textContent(final String textContent) {return new Text(textContent); }/** * 构造一个 TagName对象，用于WebView操作中的WebElement查找 * Select a WebElement by its tag name. *  * @param tagName the tag name of the web element * @return the TagName object */public static By tagName(final String tagName) {return new TagName(tagName); }/** * 父类方法，提給给子类实现 * Returns the value.  *  * @return the value */public String getValue(){return "";}// Id对象继承By用于WebView操作中的按照id查找WebElementstatic class Id extends By {private final String id;public Id(String id) {this.id = id;}@Overridepublic String getValue(){return id;}}// Xpath对象继承By用于WebView操作中的按照Xpath查找WebElementstatic class Xpath extends By {private final String xpath;public Xpath(String xpath) {this.xpath = xpath;}@Overridepublic String getValue(){return xpath;}}// CssSelector对象继承By用于WebView操作中的按照CssSelector查找WebElementstatic class CssSelector extends By {private final String selector;public CssSelector(String selector) {this.selector = selector;}@Overridepublic String getValue(){return selector;}}// Name对象继承By用于WebView操作中的按照Name查找WebElementstatic class Name extends By {private final String name;public Name(String name) {this.name = name;}@Overridepublic String getValue(){return name;}}// ClassName对象继承By用于WebView操作中的按照ClassName查找WebElementstatic class ClassName extends By {private final String className;public ClassName(String className) {this.className = className;}@Overridepublic String getValue(){return className;}}// Text对象继承By用于WebView操作中的按照Text查找WebElementstatic class Text extends By {private final String textContent;public Text(String textContent) {this.textContent = textContent;}@Overridepublic String getValue(){return textContent;}}// TagName对象继承By用于WebView操作中的按照TagName查找WebElementstatic class TagName extends By {private final String tagName;public TagName(String tagName){this.tagName = tagName;}@Overridepublic String getValue(){return tagName;}}}