ApplicationMetadataCollector.java

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 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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
 *  
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 *  software distributed under the License is distributed on an
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package org.apache.wink.common.internal.registry.metadata;

import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Member;
import java.lang.reflect.Type;

import javax.ws.rs.core.Application;

import org.apache.wink.common.internal.registry.Injectable;
import org.apache.wink.common.internal.registry.InjectableFactory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Collects ClassMetadata from JAX-RS Application classes
 */
public class ApplicationMetadataCollector extends AbstractMetadataCollector {

    private static final Logger logger =
                                           LoggerFactory
                                               .getLogger(ApplicationMetadataCollector.class);

    private ApplicationMetadataCollector(Class<?> clazz) {
        super(clazz);
    }

    public static ClassMetadata collectMetadata(Class<?> clazz) {
        logger.trace("collectMetadata({})", clazz);
        ApplicationMetadataCollector collector = new ApplicationMetadataCollector(clazz);
        collector.parseFields();
        collector.parseConstructors();
        ClassMetadata md = collector.getMetadata();
        logger.trace("collectMetadata() exit returning {}", md);
        return md;
    }

    @Override
    protected final Injectable parseAccessibleObject(AccessibleObject field, Type fieldType) {
        logger.trace("parseAccessibleObject({}, {})", field, fieldType);
        Injectable injectable =
            InjectableFactory.getInstance().create(fieldType,
                                                   field.getAnnotations(),
                                                   (Member)field,
                                                   getMetadata().isEncoded(),
                                                   null);
        logger.trace("Injectable is {}", injectable);
        if (injectable.getParamType() == Injectable.ParamType.ENTITY) {
            // EntityParam should be ignored for fields (see JSR-311 3.2)
            logger.trace("parseAccessibleObject() returning null");
            return null;
        }
        logger.trace("parseAccessibleObject() returning {}", injectable);
        return injectable;
    }

    @Override
    protected final boolean isConstructorParameterValid(Injectable fp) {
        logger.trace("isConstructorParameterValid({}) entry", fp);
        // This method is declared as final, since parseConstructors(), which
        // calls it, is invoked from the constructor
        boolean ret = !(fp.getParamType() == Injectable.ParamType.ENTITY);
        if (logger.isTraceEnabled()) {
            logger.trace("isConstructorParameterValid() exit returning {}", ret);
        }
        return ret;
    }

    @SuppressWarnings("unchecked")
    public static boolean isApplication(Class cls) {
        logger.trace("isApplication({}) entry", cls);
        boolean ret = Application.class.isAssignableFrom(cls);
        logger.trace("isApplication() exit returning {}", ret);
        return ret;
    }

}