guru.nidi.graphviz.engine.EngineResult Maven / Gradle / Ivy
/*
* Copyright © 2015 Stefan Niederhauser ([email protected])
*
* 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 guru.nidi.graphviz.engine;
import javax.annotation.Nullable;
import java.io.File;
import java.io.IOException;
import java.util.Objects;
import java.util.function.Consumer;
import java.util.function.Function;
public final class EngineResult {
@Nullable
private final File file;
@Nullable
private final String string;
private EngineResult(@Nullable File file, @Nullable String string) {
this.file = file;
this.string = string;
}
public static EngineResult fromFile(File file) {
return new EngineResult(file, null);
}
public static EngineResult fromString(String string) {
return new EngineResult(null, string);
}
public EngineResult mapString(Function mapper) {
return string == null ? this : fromString(mapper.apply(string));
}
public void consume(Consumer fileConsumer, Consumer stringConsumer) {
if (string == null) {
fileConsumer.accept(file);
} else {
stringConsumer.accept(string);
}
close();
}
public T map(Function fileMapper, Function stringMapper) {
final T res = string == null ? fileMapper.apply(file) : stringMapper.apply(string);
close();
return res;
}
T mapIO(IOFunction fileMapper, IOFunction stringMapper) throws IOException {
final T res = string == null ? fileMapper.apply(file) : stringMapper.apply(string);
close();
return res;
}
private void close() {
if (file != null) {
file.delete();
}
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
final EngineResult that = (EngineResult) o;
return Objects.equals(file, that.file) && Objects.equals(string, that.string);
}
@Override
public int hashCode() {
return Objects.hash(file, string);
}
@Override
public String toString() {
return "EngineResult{"
+ "file=" + file
+ ", string='" + string + '\''
+ '}';
}
}
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