dagger2.internal.codegen.writer.ConstructorWriter.java Source code

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Here is the source code for dagger2.internal.codegen.writer.ConstructorWriter.java

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/*
 * Copyright (C) 2014 Google, Inc.
 *
 * 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 dagger2.internal.codegen.writer;

import com.google.common.base.Function;
import com.google.common.collect.FluentIterable;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Iterables;
import com.google.common.collect.Maps;
import java.io.IOException;
import java.util.Map;
import java.util.Set;
import javax.lang.model.element.TypeElement;

import static com.google.common.base.Preconditions.checkArgument;

public final class ConstructorWriter extends Modifiable implements Writable, HasClassReferences {
    private final String name;
    private final Map<String, VariableWriter> parameterWriters;
    private final BlockWriter blockWriter;

    ConstructorWriter(String name) {
        this.name = name;
        this.parameterWriters = Maps.newLinkedHashMap();
        this.blockWriter = new BlockWriter();
    }

    public VariableWriter addParameter(Class<?> type, String name) {
        return addParameter(ClassName.fromClass(type), name);
    }

    public VariableWriter addParameter(TypeElement type, String name) {
        return addParameter(ClassName.fromTypeElement(type), name);
    }

    public VariableWriter addParameter(TypeWriter type, String name) {
        return addParameter(type.name, name);
    }

    public VariableWriter addParameter(TypeName type, String name) {
        VariableWriter parameterWriter = new VariableWriter(type, name);
        parameterWriters.put(name, parameterWriter);
        return parameterWriter;
    }

    public Map<String, TypeName> parameters() {
        ImmutableMap.Builder<String, TypeName> params = ImmutableMap.builder();
        for (Map.Entry<String, VariableWriter> entry : parameterWriters.entrySet()) {
            params.put(entry.getKey(), entry.getValue().type());
        }
        return params.build();
    }

    public BlockWriter body() {
        return blockWriter;
    }

    private VariableWriter addParameter(ClassName type, String name) {
        checkArgument(!parameterWriters.containsKey(name));
        VariableWriter parameterWriter = new VariableWriter(type, name);
        parameterWriters.put(name, parameterWriter);
        return parameterWriter;
    }

    @Override
    public Set<ClassName> referencedClasses() {
        return FluentIterable.from(Iterables.concat(parameterWriters.values(), ImmutableList.of(blockWriter)))
                .transformAndConcat(new Function<HasClassReferences, Set<ClassName>>() {
                    @Override
                    public Set<ClassName> apply(HasClassReferences input) {
                        return input.referencedClasses();
                    }
                }).toSet();
    }

    @Override
    public Appendable write(Appendable appendable, Context context) throws IOException {
        writeModifiers(appendable).append(name).append('(');
        Writables.join(", ", parameterWriters.values(), appendable, context);
        appendable.append(") {");
        blockWriter.write(new IndentingAppendable(appendable), context);
        return appendable.append("}\n");
    }
}