com.ovea.tajin.framework.template.FileSystemTemplateResolver Maven / Gradle / Ivy

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/**
 * Copyright (C) 2011 Ovea 
 *
 * 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 com.ovea.tajin.framework.template;

import com.ovea.tajin.framework.io.Resource;

import java.io.File;
import java.io.IOException;
import java.net.MalformedURLException;

/**
 * @author Mathieu Carbou ([email protected])
 */
public final class FileSystemTemplateResolver extends TemplateResolverSkeleton {
    private final File webDir;

    public FileSystemTemplateResolver(TemplateCompiler compiler, File baseDir) {
        super(compiler);
        try {
            this.webDir = baseDir.getCanonicalFile();
        } catch (IOException e) {
            throw new IllegalArgumentException(e.getMessage(), e);
        }
    }

    @Override
    protected Resource tryPath(String path) {
        File file = new File(webDir, path);
        if (file.exists()) {
            try {
                if (!file.getCanonicalFile().getAbsolutePath().startsWith(webDir.getAbsolutePath())) {
                    throw new TemplateResolverException("Web template folder " + webDir + " cannot serve template " + path);
                }
                return Resource.url(file.toURI().toURL());
            } catch (MalformedURLException e) {
                throw new TemplateResolverException("Error getting URL from file " + file + " : " + e.getMessage(), e);
            } catch (IOException e) {
                throw new TemplateResolverException("Error accessing file path " + file + " : " + e.getMessage(), e);
            }
        }
        return null;
    }
}