org.jannocessor.adapter.JavaElementAdapter.java Source code

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Here is the source code for org.jannocessor.adapter.JavaElementAdapter.java

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/**
 * Copyright 2011 Nikolche Mihajlovski
 *
 * This file is part of JAnnocessor.
 *
 * JAnnocessor is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * JAnnocessor is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with JAnnocessor.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.jannocessor.adapter;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Set;

import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.Element;
import javax.lang.model.element.Modifier;
import javax.lang.model.util.Elements;
import javax.lang.model.util.Types;

import org.apache.commons.lang.ArrayUtils;
import org.jannocessor.collection.Power;
import org.jannocessor.collection.api.PowerList;
import org.jannocessor.model.CodeNode;
import org.jannocessor.model.JavaElement;
import org.jannocessor.model.JavaElementKind;
import org.jannocessor.model.Name;
import org.jannocessor.model.structure.JavaMetadata;
import org.jannocessor.model.type.JavaType;

public abstract class JavaElementAdapter extends JavaCodeModelAdapter implements JavaElement, SourceHolder {

    private static final long serialVersionUID = -6260794797849358247L;

    private final Element element;

    public JavaElementAdapter(Element element, Elements elementUtils, Types typeUtils) {
        super(elementUtils, typeUtils);
        this.element = element;
    }

    @Override
    public JavaElement getParent() {
        return retrieveParent();
    }

    @SuppressWarnings("unchecked")
    protected <T> T retrieveParent() {
        return (T) getElementAdapter(element.getEnclosingElement(), JavaElement.class);
    }

    private List<? extends Element> getEnclosedElements(Element element) {
        if (element == null) {
            throw new IllegalArgumentException("The element must not be NULL!");
        }

        try {
            // sometimes a strange NPE arises here, it's probably a bug
            return element.getEnclosedElements();
        } catch (Exception e) {
            return new ArrayList<Element>();
        }
    }

    protected PowerList<CodeNode> getEnclosedElements() {
        PowerList<CodeNode> enclosedElements = Power.list();

        for (Element enclosedElement : getEnclosedElements(element)) {
            enclosedElements.add(getElementAdapter(enclosedElement, JavaElement.class));
        }

        return enclosedElements;
    }

    @Override
    public Name getName() {
        return getNameAdapter(element.getSimpleName().toString());
    }

    @Override
    public Element retrieveSourceElement() {
        return element;
    }

    @Override
    public JavaType getType() {
        return getTypeAdapter(element.asType());
    }

    @SuppressWarnings("unchecked")
    protected <T> PowerList<T> findChildrenByType(Class<T> clazz) {
        PowerList<T> results = Power.list();

        for (CodeNode child : getEnclosedElements()) {
            if (clazz.isAssignableFrom(child.getClass())) {
                results.add((T) child);
            }
        }

        return results;
    }

    @SuppressWarnings("unchecked")
    protected <T extends Enum<T>> T[] getModifierValues(Class<T> enumType, String... exceptValues) {
        Set<Modifier> modifiers = element.getModifiers();
        T[] values = (T[]) Array.newInstance(enumType, modifiers.size());

        int index = 0;
        for (Modifier modifier : modifiers) {
            if (!ArrayUtils.contains(exceptValues, modifier.name())) {
                values[index++] = Enum.valueOf(enumType, modifier.name());
            }
        }

        if (index < values.length) {
            // if some modifier was filtered out, cut the array
            values = Arrays.copyOf(values, index);
        }

        return values;
    }

    @Override
    public JavaElementKind getKind() {
        String kindName = element.getKind().toString();
        if (kindName.equals("ANNOTATION_TYPE")) {
            kindName = "ANNOTATION";
        }

        JavaElementKind kind = JavaElementKind.valueOf(kindName);

        switch (kind) {
        case CLASS:
        case INTERFACE:
        case ENUM:
        case ANNOTATION:
            kind = JavaElementKind.valueOf("NESTED_" + kindName);
            break;
        }

        return kind;
    }

    protected PowerList<JavaMetadata> getAnnotatedMetadata() {
        PowerList<JavaMetadata> results = Power.list();

        for (AnnotationMirror annotationMirror : element.getAnnotationMirrors()) {
            results.add(getMetadataAdapter(annotationMirror));
        }

        return results;
    }

    @Override
    protected Class<? extends JavaElement> getAdaptedInterface() {
        return JavaElement.class;
    }

    @Override
    public JavaElement copy() {
        throw calculatedMethodException();
    }

}