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95 lines
3.2 KiB
95 lines
3.2 KiB
/*
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* Copyright (C) 2017 The Dagger Authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dagger.internal.codegen;
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import static com.google.common.base.Preconditions.checkArgument;
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import com.google.common.collect.ImmutableList;
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import com.google.testing.compile.JavaFileObjects;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Set;
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import javax.tools.JavaFileObject;
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/**
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* A fluent API to build a {@link JavaFileObject} appropriate for a current set of settings, such as
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* compiler mode.
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*
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* <p>After creating a builder, you can add lines to the file. Call {@link #addLines(String...)} to
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* add lines irrespective of the settings. If you want to add different lines for different possible
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* settings, call {@link #addLinesIf(Object, String...)} to add those lines only if the given
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* setting has been added via {@link #withSetting(Object)} or {@link #withSettings(Object...)}.
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*/
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final class JavaFileBuilder {
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private final String qualifiedName;
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private final Set<Object> settings = new HashSet<>();
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private final ImmutableList.Builder<String> sourceLines = ImmutableList.builder();
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/** Creates a builder for a file whose top level type has a given qualified name. */
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JavaFileBuilder(String qualifiedName) {
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checkArgument(!qualifiedName.isEmpty());
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this.qualifiedName = qualifiedName;
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}
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// TODO(cgdecker): Get rid of the special constructor/method for CompilerMode
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/** Creates a builder for a file whose top level type has a given qualified name. */
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JavaFileBuilder(CompilerMode compilerMode, String qualifiedName) {
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this(qualifiedName);
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settings.add(compilerMode);
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}
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/** Adds the given setting as one that code should be generated for. */
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JavaFileBuilder withSetting(Object setting) {
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this.settings.add(setting);
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return this;
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}
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/** Adds the given settings as one that code should be generated for. */
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JavaFileBuilder withSettings(Object s1, Object s2, Object... more) {
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settings.add(s1);
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settings.add(s2);
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Collections.addAll(settings, more);
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return this;
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}
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/** Adds lines no matter what the {@link CompilerMode} is. */
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JavaFileBuilder addLines(String... lines) {
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sourceLines.add(lines);
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return this;
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}
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/** Adds lines if in the given mode. */
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JavaFileBuilder addLinesIn(CompilerMode mode, String... lines) {
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return addLinesIf(mode, lines);
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}
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/** Adds lines if in the given setting is set. */
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JavaFileBuilder addLinesIf(Object setting, String... lines) {
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if (settings.contains(setting)) {
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sourceLines.add(lines);
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}
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return this;
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}
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/** Builds the {@link JavaFileObject}. */
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JavaFileObject build() {
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return JavaFileObjects.forSourceLines(qualifiedName, sourceLines.build());
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}
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}
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