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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The SFC licenses this file
// to you 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.

package org.openqa.selenium.lift.match;

import org.openqa.selenium.WebElement;

import org.hamcrest.Description;
import org.hamcrest.Factory;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

/**
 * hamcrest matcher for attributes of {@link WebElement}s.
 */
public class AttributeMatcher extends TypeSafeMatcher {

  private final Matcher matcher;
  private final String name;

  AttributeMatcher(String name, Matcher matcher) {
    this.name = name;
    this.matcher = matcher;
  }

  @Override
  public boolean matchesSafely(WebElement item) {
    return matcher.matches(item.getAttribute(name));
  }

  public void describeTo(Description description) {
    description.appendText("attribute ").appendValue(name);
    matcher.describeTo(description);
  }

  @Factory
  public static Matcher attribute(final String name, final Matcher valueMatcher) {
    return new AttributeMatcher(name, valueMatcher);
  }

}