org.senchalabs.gwt.gwtdriver.by.FasterByChained.java Source code

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Here is the source code for org.senchalabs.gwt.gwtdriver.by.FasterByChained.java

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package org.senchalabs.gwt.gwtdriver.by;

/*
 * #%L
 * gwt-driver
 * %%
 * Copyright (C) 2012 - 2013 Sencha Labs
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

import java.util.List;

import org.openqa.selenium.By;
import org.openqa.selenium.NoSuchElementException;
import org.openqa.selenium.SearchContext;
import org.openqa.selenium.WebElement;
import org.openqa.selenium.internal.selenesedriver.FindElements;
import org.openqa.selenium.support.pagefactory.ByChained;

/**
 * When looking for only one item, speeds up the last By in the chain by only running it until it
 * finds something.
 * <p>
 * When using {@link FindElements}, uses ByChained to find all possible elements as normal.
 * <p>
 * Using this class should be functionally eqivelent to using ByChained, except faster in some
 * cases.
 *
 */
public class FasterByChained extends By {
    private By[] bys;

    public FasterByChained(By... bys) {
        this.bys = bys;
    }

    @Override
    public List<WebElement> findElements(SearchContext context) {
        return new ByChained(bys).findElements(context);
    }

    @Override
    public WebElement findElement(SearchContext context) {
        By[] firstBys = new By[bys.length - 1];
        System.arraycopy(bys, 0, firstBys, 0, firstBys.length);
        List<WebElement> elts = new ByChained(firstBys).findElements(context);
        if (elts == null) {
            throw new NoSuchElementException("Cannot locate element using " + this);
        }
        for (WebElement elt : elts) {
            try {
                return elt.findElement(bys[bys.length - 1]);
            } catch (NoSuchElementException ex) {
                continue;
            }
        }
        throw new NoSuchElementException("Cannot locate element using " + this);
    }

    @Override
    public String toString() {
        StringBuilder stringBuilder = new StringBuilder("FasterByChained(");
        stringBuilder.append("{");

        boolean first = true;
        for (By by : bys) {
            stringBuilder.append((first ? "" : ",")).append(by);
            first = false;
        }
        stringBuilder.append("})");
        return stringBuilder.toString();
    }
}