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/*

Copyright (c) 2000-2018, Board of Trustees of Leland Stanford Jr. University,
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation and/or
other materials provided with the distribution.

3. Neither the name of the copyright holder nor the names of its contributors
may be used to endorse or promote products derived from this software without
specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

package org.lockss.util.test.matcher;

import java.util.regex.Pattern;

import org.hamcrest.*;

/** Regexp matcher to use with assertThat.  Succeeds if pattern matches
 * anywhere within input string.  Eg, assertThat("reason",
 * "abc123", FindPattern.findPattern("c12")) */
// Modification of MatchPattern to allow substring match.  Likely still
// needed even if upgrade to hamcrest 2.0
public class FindPattern extends TypeSafeMatcher {
  
  private final Pattern pattern;

  public FindPattern(Pattern pattern) {
    this.pattern = pattern;
  }

  @Override
  protected boolean matchesSafely(String item) {
    return pattern.matcher(item).find();
  }

  @Override
  public void describeTo(Description description) {
    description.appendText("a string containing the pattern '" + pattern + "'");
  }

  /**
   * Creates a matcher of {@link java.lang.String} that matches when the
   * pattern is contained in the examined string
   */
  public static Matcher findPattern(Pattern pattern) {
    return new FindPattern(pattern);
  }

  /**
   * Creates a matcher of {@link java.lang.String} that matches when the
   * regex is contained in the examined string
   */
  public static Matcher findPattern(String regex) {
    return new FindPattern(Pattern.compile(regex));
  }
}