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/*
* PartFactory.java February 2007
*
* Copyright (C) 2007, Niall Gallagher <niallg@users.sf.net>
*
* 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.simpleframework.http.message;
import org.simpleframework.common.buffer.Allocator;
/**
* The <code>PartFactory</code> represents a factory for creating the
* consumers that are used to read a multipart upload message. This
* supports two types of consumers for the multipart upload, lists
* and bodies. A part list is basically a collection of parts and or
* part lists. The part type is determined from the part header.
*
* @author Niall Gallagher
*
* @see org.simpleframework.http.message.PartSeriesConsumer
* @see org.simpleframework.http.message.PartBodyConsumer
*/
class PartFactory extends ConsumerFactory {
/**
* This is the overall length of the parent part series.
*/
private final long length;
/**
* Constructor for the <code>PartFactory</code> object. This is
* used to create a factory using a buffer allocator, which will
* create a buffer for accumulating the entire message body,
* also to ensure the correct part type is created this requires
* the header information for the part.
*
* @param allocator this is used to allocate the internal buffer
* @param header this is used to determine the part type
* @param length this is the length of the parent part series
*/
public PartFactory(Allocator allocator, Segment header, long length) {
super(allocator, header);
this.length = length;
}
/**
* This method is used to create the consumer given the list and
* boundary for the part. In order to determine the part type
* this will consult the header consumed for the part. Depending
* on whether it is a list or body a suitable consumer is created.
*
* @param series this is the list used to collect the parts
* @param boundary this is the boundary used to terminate the part
*
* @return this will return the consumer for the part body
*/
public BodyConsumer getInstance(PartSeries series, byte[] boundary) {
byte[] terminal = getBoundary(segment);
if(isUpload(segment)) {
return new PartSeriesConsumer(allocator, series, terminal, length);
}
return new PartBodyConsumer(allocator, segment, series, boundary);
}
}
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