org.freud.analysed.javasource.jdom.AnnotationJdom.java Source code

Introduction

Here is the source code for org.freud.analysed.javasource.jdom.AnnotationJdom.java

Source

/*
 * Copyright 2013 LMAX Ltd.
 *
 * 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 org.freud.analysed.javasource.jdom;

import org.apache.commons.jxpath.JXPathContext;
import org.freud.analysed.javasource.Annotation;
import org.freud.analysed.javasource.parser.JavaSourceTokenType;
import org.freud.core.parser.JdomTreeAdaptor;
import org.jdom.Element;
import org.jdom.filter.ElementFilter;

import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

final class AnnotationJdom implements Annotation {
    private final Element annotationElement;
    private final String name;
    private final String defaultParameter;
    private final Map<String, String> parameterMap;

    @SuppressWarnings("unchecked")
    public AnnotationJdom(Element annotationElement) {
        this.annotationElement = annotationElement;
        this.name = annotationElement.getAttribute(JdomTreeAdaptor.ID_ATTR).getValue();
        final Iterator<Element> iterator = annotationElement
                .getDescendants(new ElementFilter(JavaSourceTokenType.ANNOTATION_INIT_DEFAULT_KEY.name()));
        if (iterator.hasNext()) {
            defaultParameter = getAnnotationValueForElement(iterator.next());
            parameterMap = Collections.emptyMap();
        } else {
            defaultParameter = null;
            final Iterator<Element> keysIterator = annotationElement
                    .getDescendants(new ElementFilter(JavaSourceTokenType.ANNOTATION_INIT_KEY_LIST.name()));
            if (keysIterator.hasNext()) {
                final List<Element> elementList = keysIterator.next().getChildren(JavaSourceTokenType.IDENT.name());
                parameterMap = new HashMap<String, String>((int) (elementList.size() * 1.5), 0.9f);
                for (Element element : elementList) {
                    String value = getAnnotationValueForElement(element);
                    final String key = element.getTextTrim();
                    parameterMap.put(key, value);
                }
            } else {
                parameterMap = Collections.emptyMap();
            }
        }
    }

    private String getAnnotationValueForElement(final Element element) {
        final JXPathContext context = JXPathContext.newContext(element);
        final Element expr = (Element) context.selectSingleNode("/" + JavaSourceTokenType.EXPR.name() + "/*");
        if (expr != null) {
            return expr.getText();
        } else {
            final List<Element> exprList = context.selectNodes("//" + JavaSourceTokenType.EXPR.name() + "/*");
            StringBuilder sb = new StringBuilder("{");
            for (Element item : exprList) {
                sb.append(item.getText()).append(",");
            }
            sb.setCharAt(sb.length() - 1, '}');
            return sb.toString();
        }
    }

    public String getName() {
        return name;
    }

    public String getDefaultParameter() {
        return defaultParameter;
    }

    public Map<String, String> getParameterMap() {
        return parameterMap;
    }

    @Override
    public String toString() {
        return name + " default=" + defaultParameter + " " + parameterMap;
    }
}