com.github.ferstl.depgraph.dependency.dot.style.resource.ClasspathStyleResource Maven / Gradle / Ivy

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This Maven plugin generates dependency graphs on single modules or in an aggregated form on multimodule projects. The graphs are represented by .dot files. In case that Graphviz is installed on the machine where this plugin is run, the .dot file can be directly converted into all supported image files.

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/*
 * Copyright (c) 2014 - 2017 the original author or authors.
 *
 * 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.github.ferstl.depgraph.dependency.dot.style.resource;

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


public class ClasspathStyleResource implements StyleResource {

  private final String name;
  private final ClassLoader classLoader;

  public ClasspathStyleResource(String name, ClassLoader classLoader) {
    this.name = name;
    this.classLoader = classLoader;
  }

  @Override
  public boolean exists() {
    return this.classLoader.getResource(this.name) != null;
  }

  @Override
  public InputStream openStream() throws IOException {
    InputStream inputStream = this.classLoader.getResourceAsStream(this.name);
    if (inputStream == null) {
      throw new IOException("Resource " + this.name + " does not exist.");
    }

    return inputStream;
  }

  @Override
  public String toString() {
    return "classpath:" + this.name;
  }
}