dagger.internal.codegen.KeyFormatter.java Source code

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Here is the source code for dagger.internal.codegen.KeyFormatter.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 dagger.internal.codegen;

import com.google.auto.common.MoreElements;
import com.google.auto.common.MoreTypes;
import com.google.common.base.Optional;

/**
 * Formats a {@link Key} into a {@link String} suitable for use in error messages and JSON keys.
 *
 * @author Christian Gruber
 * @since 2.0
 */
final class KeyFormatter extends Formatter<Key> {

    private final MethodSignatureFormatter methodSignatureFormatter;

    KeyFormatter(MethodSignatureFormatter methodSignatureFormatter) {
        this.methodSignatureFormatter = methodSignatureFormatter;
    }

    @Override
    public String format(Key request) {
        if (request.bindingMethod().isPresent()) {
            // If there's a binding method, its signature is enough.
            SourceElement bindingMethod = request.bindingMethod().get();
            return methodSignatureFormatter.format(MoreElements.asExecutable(bindingMethod.element()),
                    Optional.of(MoreTypes.asDeclared(bindingMethod.contributedBy().get().asType())));
        }
        StringBuilder builder = new StringBuilder();
        if (request.qualifier().isPresent()) {
            builder.append(request.qualifier().get());
            builder.append(' ');
        }
        builder.append(request.type());
        return builder.toString();
    }
}