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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.core.HttpRequestContext;
import com.sun.jersey.api.model.Parameter;
import com.sun.jersey.api.representation.Form;
import com.sun.jersey.core.header.MediaTypes;
import com.sun.jersey.core.spi.component.ComponentContext;
import com.sun.jersey.server.impl.inject.AbstractHttpContextInjectable;
import com.sun.jersey.server.impl.model.method.dispatch.FormDispatchProvider;
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.FormParam;
import javax.ws.rs.core.MediaType;


/**
 *
 * @author [email protected]
 */
public final class FormParamInjectableProvider extends BaseParamInjectableProvider {
    
    private static final class FormParamInjectable extends AbstractHttpContextInjectable {
        private final MultivaluedParameterExtractor extractor;
        private final boolean decode;
        
        FormParamInjectable(MultivaluedParameterExtractor extractor, boolean decode) {
            this.extractor = extractor;
            this.decode = decode;
        }
        
        public Object getValue(HttpContext context) {
            Form form = (Form)
                    context.getProperties().get(FormDispatchProvider.FORM_PROPERTY);
            if (form == null) {
                form = getForm(context);
                if (form == null)
                    throw new IllegalStateException(
                            "The @FormParam is utilized when the content type of the request entity " +
                            "is not application/x-www-form-urlencoded");
            }

            try {
                return extractor.extract(form);
            } catch (ExtractorContainerException e) {
                throw new ParamException.FormParamException(e.getCause(),
                        extractor.getName(), extractor.getDefaultStringValue());
            }
        }

        private Form getForm(HttpContext context) {
            final HttpRequestContext r = context.getRequest();
            if (r.getMethod().equals("GET"))
                return null;

            if (!MediaTypes.typeEquals(MediaType.APPLICATION_FORM_URLENCODED_TYPE, r.getMediaType()))
                return null;

            final Form form = r.getFormParameters();
            context.getProperties().put(FormDispatchProvider.FORM_PROPERTY, form);
            return form;
        }
    }

    public FormParamInjectableProvider(MultivaluedParameterExtractorProvider w) {
        super(w);
    }
    
    public Injectable getInjectable(ComponentContext ic, FormParam a, Parameter c) {
        String parameterName = c.getSourceName();
        if (parameterName == null || parameterName.length() == 0) {
            // Invalid query parameter name
            return null;
        }
        
        MultivaluedParameterExtractor e = get(c);
        if (e == null)
            return null;
        
        return new FormParamInjectable(e, !c.isEncoded());
    }
}    

    

    
            
    
            







    
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