org.springframework.aot.generate.InMemoryGeneratedFiles Maven / Gradle / Ivy
/*
* Copyright 2002-2022 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
*
* 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 org.springframework.aot.generate;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Collections;
import java.util.HashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import org.springframework.core.io.InputStreamSource;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* {@link GeneratedFiles} implementation that keeps generated files in-memory.
*
* @author Phillip Webb
* @since 6.0
*/
public class InMemoryGeneratedFiles implements GeneratedFiles {
private final Map> files = new HashMap<>();
@Override
public void addFile(Kind kind, String path, InputStreamSource content) {
Assert.notNull(kind, "'kind' must not be null");
Assert.hasLength(path, "'path' must not be empty");
Assert.notNull(content, "'content' must not be null");
Map paths = this.files.computeIfAbsent(kind,
key -> new LinkedHashMap<>());
Assert.state(!paths.containsKey(path), () -> "Path '" + path + "' already in use");
paths.put(path, content);
}
/**
* Return a {@link Map} of the generated files of a specific {@link Kind}.
* @param kind the kind of generated file
* @return a {@link Map} of paths to {@link InputStreamSource} instances
*/
public Map getGeneratedFiles(Kind kind) {
Assert.notNull(kind, "'kind' must not be null");
return Collections.unmodifiableMap(this.files.getOrDefault(kind, Collections.emptyMap()));
}
/**
* Return the content of the specified file.
* @param kind the kind of generated file
* @param path the path of the file
* @return the file content or {@code null} if no file could be found
* @throws IOException on read error
*/
@Nullable
public String getGeneratedFileContent(Kind kind, String path) throws IOException {
InputStreamSource source = getGeneratedFile(kind, path);
if (source != null) {
return new String(source.getInputStream().readAllBytes(), StandardCharsets.UTF_8);
}
return null;
}
/**
* Return the {@link InputStreamSource} of specified file.
* @param kind the kind of generated file
* @param path the path of the file
* @return the file source or {@code null} if no file could be found
*/
@Nullable
public InputStreamSource getGeneratedFile(Kind kind, String path) {
Assert.notNull(kind, "'kind' must not be null");
Assert.hasLength(path, "'path' must not be empty");
Map paths = this.files.get(kind);
return (paths != null) ? paths.get(path) : null;
}
}