com.speedment.common.codegen.internal.java.view.ConstructorView Maven / Gradle / Ivy

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A Speedment bundle that shades all dependencies into one jar. This is useful when deploying an application on a server.
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/*
 *
 * Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
 *
 * 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 com.speedment.common.codegen.internal.java.view;

import com.speedment.common.codegen.Generator;
import com.speedment.common.codegen.Transform;
import static com.speedment.common.codegen.internal.util.CollectorUtil.joinIfNotEmpty;
import static com.speedment.common.codegen.internal.util.NullUtil.requireNonNulls;

import com.speedment.common.codegen.internal.java.view.trait.HasAnnotationUsageView;
import com.speedment.common.codegen.internal.java.view.trait.HasCodeView;
import com.speedment.common.codegen.internal.java.view.trait.HasFieldsView;
import com.speedment.common.codegen.internal.java.view.trait.HasGenericsView;
import com.speedment.common.codegen.internal.java.view.trait.HasJavadocView;
import com.speedment.common.codegen.internal.java.view.trait.HasModifiersView;
import com.speedment.common.codegen.internal.java.view.trait.HasThrowsView;
import com.speedment.common.codegen.model.Constructor;
import com.speedment.common.codegen.model.Method;
import com.speedment.common.codegen.model.trait.HasName;
import com.speedment.common.codegen.util.Formatting;

import static com.speedment.common.codegen.model.modifier.Modifier.ABSTRACT;
import static com.speedment.common.codegen.model.modifier.Modifier.PRIVATE;
import static com.speedment.common.codegen.model.modifier.Modifier.PROTECTED;
import static com.speedment.common.codegen.model.modifier.Modifier.PUBLIC;
import static com.speedment.common.codegen.util.Formatting.*;
import java.util.Optional;
import java.util.stream.Collectors;

/**
 * Transforms from a {@link Constructor} to java code.
 * 
 * @author Emil Forslund
 */
public final class ConstructorView
implements Transform,
           HasThrowsView,
           HasGenericsView,
           HasFieldsView,
           HasJavadocView,
           HasAnnotationUsageView,
           HasCodeView,
           HasModifiersView {

    @Override
    public String fieldSeparator(Constructor model) {
        if (model.getFields().size() >= 3
        ||  model.getFields().stream()
            .anyMatch(f -> !f.getAnnotations().isEmpty())) {
            return "," + nl() + tab() + tab();
        } else return ", ";
    }

    @Override
    public String throwsSuffix(Constructor model) {
        return " ";
    }

    @Override
	public Optional transform(Generator gen, Constructor model) {
        requireNonNulls(gen, model);

        return Optional.of(
            renderJavadoc(gen, model) +
            renderAnnotations(gen, model) +
            renderModifiers(gen, model, PUBLIC, PRIVATE, PROTECTED) +
            renderGenerics(gen, model) +
            renderName(gen, model)
                .orElseThrow(() -> new UnsupportedOperationException(
                    "Could not find a nameable parent of constructor."
                )) +
            ((splitFields(model)) ? "(" + nl() + tab() + tab() : "(") +
            renderFields(gen, model) + ") " +
            renderThrows(gen, model) +
            renderCode(gen, model)
        );
	}
	
    /**
     * Renders the name of this constructor. In java, this is the name of the
     * class or enum that the constructor is in.
     * 
     * @param gen    the generator
     * @param model  the constructor
     * @return       the rendered name
     */
	private static Optional renderName(Generator gen, Constructor model) {
        requireNonNulls(gen, model);

        return gen.getRenderStack()
            .fromTop(HasName.class)
            .map(HasName::getName)
            .map(Formatting::shortName)
            .findFirst();
	}

    private boolean splitFields(Constructor model) {
        return model.getFields().size() >= 3 || model.getFields().stream()
            .anyMatch(f -> !f.getAnnotations().isEmpty());
    }
}