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/*
* Copyright (C) 2017 The Dagger 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 dagger.internal.codegen;
import static com.google.common.base.Preconditions.checkArgument;
import androidx.room.compiler.processing.util.Source;
import com.google.common.collect.ImmutableList;
import dagger.testing.compile.CompilerTests;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
/**
* A fluent API to build a {@link Source} appropriate for a current set of settings, such as
* compiler mode.
*
* <p>After creating a builder, you can add lines to the file. Call {@link #addLines(String...)} to
* add lines irrespective of the settings. If you want to add different lines for different possible
* settings, call {@link #addLinesIf(Object, String...)} to add those lines only if the given
* setting has been added via {@link #withSetting(Object)} or {@link #withSettings(Object...)}.
*/
final class JavaFileBuilder {
private final String qualifiedName;
private final Set<Object> settings = new HashSet<>();
private final ImmutableList.Builder<String> sourceLines = ImmutableList.builder();
/** Creates a builder for a file whose top level type has a given qualified name. */
JavaFileBuilder(String qualifiedName) {
checkArgument(!qualifiedName.isEmpty());
this.qualifiedName = qualifiedName;
}
// TODO(cgdecker): Get rid of the special constructor/method for CompilerMode
/** Creates a builder for a file whose top level type has a given qualified name. */
JavaFileBuilder(CompilerMode compilerMode, String qualifiedName) {
this(qualifiedName);
settings.add(compilerMode);
}
/** Adds the given setting as one that code should be generated for. */
JavaFileBuilder withSetting(Object setting) {
this.settings.add(setting);
return this;
}
/** Adds the given settings as one that code should be generated for. */
JavaFileBuilder withSettings(Object s1, Object s2, Object... more) {
settings.add(s1);
settings.add(s2);
Collections.addAll(settings, more);
return this;
}
/** Adds lines no matter what the {@link CompilerMode} is. */
JavaFileBuilder addLines(String... lines) {
sourceLines.add(lines);
return this;
}
/** Adds lines if in the given mode. */
JavaFileBuilder addLinesIn(CompilerMode mode, String... lines) {
return addLinesIf(mode, lines);
}
/** Adds lines if in the given setting is set. */
JavaFileBuilder addLinesIf(Object setting, String... lines) {
if (settings.contains(setting)) {
sourceLines.add(lines);
}
return this;
}
/** Builds the {@link Source}. */
Source buildSource() {
return CompilerTests.javaSource(qualifiedName, sourceLines.build().toArray(new String[] {}));
}
}
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