com.planet57.gshell.branding.LicenseSupport.java Source code

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Here is the source code for com.planet57.gshell.branding.LicenseSupport.java

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/*
 * Copyright (c) 2009-present 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.planet57.gshell.branding;

import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.net.URI;

import com.google.common.io.CharStreams;

import javax.annotation.Nullable;

import static com.google.common.base.Preconditions.checkNotNull;

/**
 * Support for {@link License) implementations.
 *
 * @since 2.5
 */
public class LicenseSupport implements License {
    private final String name;

    @Nullable
    private final URI uri;

    public LicenseSupport(final String name, @Nullable final URI uri) {
        this.name = checkNotNull(name);
        this.uri = uri;
    }

    public LicenseSupport(final String name, final String uri) {
        this(name, URI.create(uri));
    }

    @Override
    public String getName() {
        return name;
    }

    @Override
    @Nullable
    public URI getUrl() {
        return uri;
    }

    @Override
    @Nullable
    public String getContent() throws IOException {
        if (uri == null) {
            return null;
        }

        StringWriter buff = new StringWriter();
        try (InputStream input = uri.toURL().openStream()) {
            CharStreams.copy(new InputStreamReader(input), buff);
        }
        return buff.toString();
    }

    @Override
    public String toString() {
        if (uri != null) {
            return String.format("%s - %s", name, uri);
        }
        return name;
    }
}