com.google.api.codegen.util.StaticResourcesHandler.java Source code

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Here is the source code for com.google.api.codegen.util.StaticResourcesHandler.java

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/* Copyright 2018 Google LLC
 *
 * 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
 *
 *      https://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.google.api.codegen.util;

import com.google.api.codegen.SnippetSetRunner;
import com.google.common.collect.ImmutableMap;
import com.google.common.io.ByteStreams;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

public class StaticResourcesHandler {
    private Map<String, String> resourceFilesMap;

    public StaticResourcesHandler(Map<String, String> resourceFilesMap) {
        this.resourceFilesMap = ImmutableMap.copyOf(resourceFilesMap);
    }

    public Map<String, String> getResourceFilesMap() {
        return this.resourceFilesMap;
    }

    public Map<String, byte[]> getResources() throws IOException {
        ClassLoader cl = getClass().getClassLoader();
        ImmutableMap.Builder<String, byte[]> resources = ImmutableMap.builder();
        for (Map.Entry<String, String> entry : resourceFilesMap.entrySet()) {
            String resourcePath = SnippetSetRunner.SNIPPET_RESOURCE_ROOT + '/' + entry.getKey();
            InputStream resourceStream = cl.getResourceAsStream(resourcePath);
            // Hack necessary to allow jar files to be included in the fat jar
            if (resourceStream == null && resourcePath.endsWith(".jar")) {
                resourcePath = resourcePath.replace(".jar", ".zjar");
                resourceStream = cl.getResourceAsStream(resourcePath);
            }
            if (resourceStream == null) {
                throw new IllegalArgumentException("Static resource not found: '" + resourcePath + "'");
            }
            byte[] resource = ByteStreams.toByteArray(resourceStream);
            resources.put(entry.getValue(), resource);
        }

        return resources.build();
    }
}