/*
* Copyright 2014 Attila Szegedi, Daniel Dekany, Jonathan Revusky
*
* 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.
*/
package freemarker.cache;
import java.io.IOException;
/**
* Matches the file extension; unlike other matchers, by default case <em>insensitive</em>. A name (a path) is
* considered to have the given extension exactly if it ends with a dot plus the extension.
*
* @since 2.3.24
*/
public class FileExtensionMatcher extends TemplateSourceMatcher {
private final String extension;
private boolean caseInsensitive = true;
/**
* @param extension
* The file extension (without the initial dot). Can't contain there characters:
* {@code '/'}, {@code '*'}, {@code '?'}. May contains {@code '.'}, but can't start with it.
*/
public FileExtensionMatcher(String extension) {
if (extension.indexOf('/') != -1) {
throw new IllegalArgumentException("A file extension can't contain \"/\": " + extension);
}
if (extension.indexOf('*') != -1) {
throw new IllegalArgumentException("A file extension can't contain \"*\": " + extension);
}
if (extension.indexOf('?') != -1) {
throw new IllegalArgumentException("A file extension can't contain \"*\": " + extension);
}
if (extension.startsWith(".")) {
throw new IllegalArgumentException("A file extension can't start with \".\": " + extension);
}
this.extension = extension;
}
@Override
public boolean matches(String sourceName, Object templateSource) throws IOException {
int ln = sourceName.length();
int extLn = extension.length();
if (ln < extLn + 1 || sourceName.charAt(ln - extLn - 1) != '.') {
return false;
}
return sourceName.regionMatches(caseInsensitive, ln - extLn, extension, 0, extLn);
}
public boolean isCaseInsensitive() {
return caseInsensitive;
}
/**
* Sets if the matching will be case insensitive (UNICODE compliant); default is {@code true}.
*/
public void setCaseInsensitive(boolean caseInsensitive) {
this.caseInsensitive = caseInsensitive;
}
/**
* Fluid API variation of {@link #setCaseInsensitive(boolean)}
*/
public FileExtensionMatcher caseInsensitive(boolean caseInsensitive) {
setCaseInsensitive(caseInsensitive);
return this;
}
}