/*
* Copyright (c) 2011, the Dart project authors.
*
* Licensed under the Eclipse Public License v1.0 (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.eclipse.org/legal/epl-v10.html
*
* 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 com.google.dart.engine.internal.search.pattern;
import com.google.dart.engine.element.Element;
import com.google.dart.engine.search.MatchQuality;
import com.google.dart.engine.search.SearchPattern;
import com.google.dart.engine.utilities.general.CharOperation;
/**
* Instances of the class <code>WildcardSearchPattern</code> implement a search pattern that matches
* elements whose name matches a pattern with wildcard characters. The wildcard characters that are
* currently supported are '?' (to match any single character) and '*' (to match zero or more
* characters).
*
* @coverage dart.engine.search
*/
public class WildcardSearchPattern implements SearchPattern {
/**
* The pattern that matching elements must match.
*/
private char[] pattern;
/**
* A flag indicating whether a case sensitive match is to be performed.
*/
private boolean caseSensitive;
/**
* Initialize a newly created search pattern to match elements whose names begin with the given
* prefix.
*
* @param pattern the pattern that matching elements must match
* @param caseSensitive {@code true} if a case sensitive match is to be performed
*/
public WildcardSearchPattern(String pattern, boolean caseSensitive) {
this.pattern = caseSensitive ? pattern.toCharArray() : pattern.toLowerCase().toCharArray();
this.caseSensitive = caseSensitive;
}
@Override
public MatchQuality matches(Element element) {
if (element == null) {
return null;
}
String name = element.getDisplayName();
if (name == null) {
return null;
}
if (CharOperation.match(pattern, name.toCharArray(), caseSensitive)) {
return MatchQuality.EXACT;
}
return null;
}
}