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/**
 * Copyright Microsoft Corporation
 * 
 * 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 com.microsoft.windowsazure.services.media.entityoperations;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.security.InvalidParameterException;

import javax.ws.rs.core.MediaType;

import com.microsoft.windowsazure.services.core.ServiceException;

/**
 * Default implementation of EntityOperation to provide
 * default values for common methods.
 * 
 */
public abstract class EntityOperationBase implements EntityOperation {

    /** The uri builder. */
    private final EntityUriBuilder uriBuilder;

    /** The proxy data. */
    private EntityProxyData proxyData;

    /**
     * Instantiates a new entity operation base.
     * 
     * @param uri
     *            the uri
     */
    protected EntityOperationBase(final String uri) {
        this.uriBuilder = new EntityUriBuilder() {
            @Override
            public String getUri() {
                return uri;
            }
        };
    }

    /**
     * Instantiates a new entity operation base.
     * 
     * @param uriBuilder
     *            the uri builder
     */
    protected EntityOperationBase(EntityUriBuilder uriBuilder) {
        this.uriBuilder = uriBuilder;
    }

    /* (non-Javadoc)
     * @see com.microsoft.windowsazure.services.media.entityoperations.EntityOperation#setProxyData(com.microsoft.windowsazure.services.media.entityoperations.EntityProxyData)
     */
    @Override
    public void setProxyData(EntityProxyData proxyData) {
        this.proxyData = proxyData;
    }

    /**
     * Get the currently set proxy data.
     * 
     * @return the proxy data
     */
    protected EntityProxyData getProxyData() {
        return proxyData;
    }

    /* (non-Javadoc)
     * @see com.microsoft.windowsazure.services.media.entities.EntityOperation#getUri()
     */
    @Override
    public String getUri() {
        return uriBuilder.getUri();
    }

    /* (non-Javadoc)
     * @see com.microsoft.windowsazure.services.media.entities.EntityOperation#getContentType()
     */
    @Override
    public MediaType getContentType() {
        return MediaType.APPLICATION_ATOM_XML_TYPE;
    }

    /* (non-Javadoc)
     * @see com.microsoft.windowsazure.services.media.entities.EntityOperation#getAcceptType()
     */
    @Override
    public MediaType getAcceptType() {
        return MediaType.APPLICATION_ATOM_XML_TYPE;
    }

    /* (non-Javadoc)
     * @see com.microsoft.windowsazure.services.media.entityoperations.EntityOperation#processResponse(java.lang.Object)
     */
    @Override
    public Object processResponse(Object rawResponse) throws ServiceException {
        return rawResponse;
    }

    /**
     * The Interface EntityUriBuilder.
     */
    public interface EntityUriBuilder {

        /**
         * Gets the uri.
         * 
         * @return the uri
         */
        String getUri();
    }

    /**
     * The Class EntityIdUriBuilder.
     */
    public static class EntityIdUriBuilder implements EntityUriBuilder {

        /** The entity type. */
        private final String entityType;

        /** The entity id. */
        private final String entityId;

        /**
         * Instantiates a new entity id uri builder.
         * 
         * @param entityName
         *            the entity name
         * @param entityId
         *            the entity id
         */
        public EntityIdUriBuilder(String entityName, String entityId) {
            super();
            this.entityType = entityName;
            this.entityId = entityId;
        }

        /* (non-Javadoc)
         * @see com.microsoft.windowsazure.services.media.entities.EntityOperationBase.EntityUriBuilder#getUri()
         */
        @Override
        public String getUri() {
            String escapedEntityId;
            try {
                escapedEntityId = URLEncoder.encode(entityId, "UTF-8");
            }
            catch (UnsupportedEncodingException e) {
                throw new InvalidParameterException(entityId);
            }
            return String.format("%s('%s')", entityType, escapedEntityId);
        }
    }
}