dagger.internal.codegen.writer.ParameterizedTypeName.java Source code

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Here is the source code for dagger.internal.codegen.writer.ParameterizedTypeName.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.writer;

import com.google.common.base.Objects;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.io.IOException;
import java.util.Iterator;
import java.util.Set;

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

public final class ParameterizedTypeName implements TypeName {
    private final ClassName type;
    private final ImmutableList<TypeName> parameters;

    ParameterizedTypeName(ClassName type, Iterable<? extends TypeName> parameters) {
        this.type = type;
        this.parameters = ImmutableList.<TypeName>copyOf(parameters);
    }

    public ClassName type() {
        return type;
    }

    public ImmutableList<TypeName> parameters() {
        return parameters;
    }

    @Override
    public Set<ClassName> referencedClasses() {
        ImmutableSet.Builder<ClassName> builder = new ImmutableSet.Builder<ClassName>().add(type);
        for (TypeName parameter : parameters) {
            builder.addAll(parameter.referencedClasses());
        }
        return builder.build();
    }

    @Override
    public Appendable write(Appendable appendable, Context context) throws IOException {
        appendable.append(context.sourceReferenceForClassName(type));
        Iterator<? extends TypeName> parameterIterator = parameters.iterator();
        verify(parameterIterator.hasNext(), type.toString());
        appendable.append('<');
        parameterIterator.next().write(appendable, context);
        while (parameterIterator.hasNext()) {
            appendable.append(", ");
            parameterIterator.next().write(appendable, context);
        }
        appendable.append('>');
        return appendable;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof ParameterizedTypeName) {
            ParameterizedTypeName that = (ParameterizedTypeName) obj;
            return this.type.equals(that.type) && this.parameters.equals(that.parameters);
        } else {
            return false;
        }
    }

    @Override
    public int hashCode() {
        return Objects.hashCode(type, parameters);
    }

    @Override
    public String toString() {
        return Writables.writeToString(this);
    }

    public static ParameterizedTypeName create(ClassName className, TypeName... parameters) {
        return new ParameterizedTypeName(className, ImmutableList.copyOf(parameters));
    }

    public static ParameterizedTypeName create(ClassName className, Iterable<? extends TypeName> parameters) {
        return new ParameterizedTypeName(className, ImmutableList.copyOf(parameters));
    }

    public static ParameterizedTypeName create(Class<?> parameterizedClass, TypeName... parameters) {
        checkArgument(parameterizedClass.getTypeParameters().length == parameters.length);
        return new ParameterizedTypeName(ClassName.fromClass(parameterizedClass), ImmutableList.copyOf(parameters));
    }
}