HeaderParamInjectableProvider.java

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package com.sun.jersey.server.impl.model.parameter;

import com.sun.jersey.api.ParamException;
import com.sun.jersey.api.core.HttpContext;
import com.sun.jersey.api.model.Parameter;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable;
import com.sun.jersey.server.impl.model.parameter.multivalued.ExtractorContainerException;
import com.sun.jersey.server.impl.model.parameter.multivalued.MultivaluedParameterExtractor;
import com.sun.jersey.server.impl.model.parameter.multivalued.MultivaluedParameterExtractorProvider;
import com.sun.jersey.spi.inject.Injectable;
import javax.ws.rs.HeaderParam;


/**
 *
 * @author Paul.Sandoz@Sun.Com
 */
public final class HeaderParamInjectableProvider extends BaseParamInjectableProvider<HeaderParam> {

    private static final class HeaderParamInjectable extends AbstractHttpContextInjectable<Object> {
        private MultivaluedParameterExtractor extractor;
        
        HeaderParamInjectable(MultivaluedParameterExtractor extractor) {
            this.extractor = extractor;
        }

        public Object getValue(HttpContext context) {
            try {
                return extractor.extract(context.getRequest().getRequestHeaders());
            } catch (ExtractorContainerException e) {
                throw new ParamException.HeaderParamException(e.getCause(),
                        extractor.getName(), extractor.getDefaultStringValue());
            }
        }
    }
    
    public HeaderParamInjectableProvider(MultivaluedParameterExtractorProvider w) {
        super(w);
    }

    public Injectable getInjectable(ComponentContext ic, HeaderParam a, Parameter c) {
        String parameterName = c.getSourceName();
        if (parameterName == null || parameterName.length() == 0) {
            // Invalid header parameter name
            return null;
        }
        
        MultivaluedParameterExtractor e =  get(c);
        if (e == null)
            return null;
        
        return new HeaderParamInjectable(e);
    }
}