de.codesourcery.eve.skills.util.ClasspathInputStreamProvider.java Source code

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Here is the source code for de.codesourcery.eve.skills.util.ClasspathInputStreamProvider.java

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/**
 * Copyright 2004-2009 Tobias Gierke <tobias.gierke@code-sourcery.de>
 *
 * 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 de.codesourcery.eve.skills.util;

import java.io.IOException;
import java.io.InputStream;

import org.apache.commons.lang.StringUtils;

public class ClasspathInputStreamProvider implements IInputStreamProvider {

    private final String path;

    public ClasspathInputStreamProvider(String path) {

        if (StringUtils.isBlank(path)) {
            throw new IllegalArgumentException("path cannot be blank / NULL");
        }
        this.path = path;
    }

    @Override
    public InputStream createInputStream() throws IOException {

        final InputStream result = ClasspathInputStreamProvider.class.getResourceAsStream(path);

        if (result == null) {
            throw new IOException("Resource not found on classpath: " + path);
        }
        return result;
    }

    @Override
    public String toString() {
        return "classpath:" + path;
    }

}