/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF 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 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;
}
}