| /**************************************************************** |
| * Licensed to the Apache Software Foundation (ASF) under one * |
| * 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 * |
| * * |
| * 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.apache.james.mime4j.message; |
| |
| import org.apache.james.mime4j.dom.Body; |
| import org.apache.james.mime4j.dom.Disposable; |
| import org.apache.james.mime4j.dom.Entity; |
| import org.apache.james.mime4j.dom.Header; |
| import org.apache.james.mime4j.dom.field.ContentDispositionField; |
| import org.apache.james.mime4j.dom.field.ContentTransferEncodingField; |
| import org.apache.james.mime4j.dom.field.ContentTypeField; |
| import org.apache.james.mime4j.dom.field.FieldName; |
| import org.apache.james.mime4j.dom.field.ParsedField; |
| |
| /** |
| * Abstract MIME entity. |
| */ |
| public abstract class AbstractEntity implements Entity { |
| private Header header = null; |
| private Body body = null; |
| private Entity parent = null; |
| |
| /** |
| * Creates a new <code>Entity</code>. Typically invoked implicitly by a |
| * subclass constructor. |
| */ |
| protected AbstractEntity() { |
| } |
| |
| /** |
| * Gets the parent entity of this entity. |
| * Returns <code>null</code> if this is the root entity. |
| * |
| * @return the parent or <code>null</code>. |
| */ |
| public Entity getParent() { |
| return parent; |
| } |
| |
| /** |
| * Sets the parent entity of this entity. |
| * |
| * @param parent the parent entity or <code>null</code> if |
| * this will be the root entity. |
| */ |
| public void setParent(Entity parent) { |
| this.parent = parent; |
| } |
| |
| /** |
| * Gets the entity header. |
| * |
| * @return the header. |
| */ |
| public Header getHeader() { |
| return header; |
| } |
| |
| /** |
| * Sets the entity header. |
| * |
| * @param header the header. |
| */ |
| public void setHeader(Header header) { |
| this.header = header; |
| } |
| |
| /** |
| * Gets the body of this entity. |
| * |
| * @return the body, |
| */ |
| public Body getBody() { |
| return body; |
| } |
| |
| /** |
| * Sets the body of this entity. |
| * |
| * @param body the body. |
| * @throws IllegalStateException if the body has already been set. |
| */ |
| public void setBody(Body body) { |
| if (this.body != null) |
| throw new IllegalStateException("body already set"); |
| |
| this.body = body; |
| body.setParent(this); |
| } |
| |
| /** |
| * Removes and returns the body of this entity. The removed body may be |
| * attached to another entity. If it is no longer needed it should be |
| * {@link Disposable#dispose() disposed} of. |
| * |
| * @return the removed body or <code>null</code> if no body was set. |
| */ |
| public Body removeBody() { |
| if (body == null) |
| return null; |
| |
| Body body = this.body; |
| this.body = null; |
| body.setParent(null); |
| |
| return body; |
| } |
| |
| public String getMimeType() { |
| ContentTypeField childType = getContentTypeField(); |
| Entity parent = getParent(); |
| ContentTypeField parentType = parent != null ? (ContentTypeField) (parent).getHeader().getField(FieldName.CONTENT_TYPE) : null; |
| return calcMimeType(childType, parentType); |
| } |
| |
| private ContentTypeField getContentTypeField() { |
| return (ContentTypeField) getHeader().getField(FieldName.CONTENT_TYPE); |
| } |
| |
| /** |
| * Determines the MIME character set encoding of this <code>Entity</code>. |
| * |
| * @return the MIME character set encoding. |
| */ |
| public String getCharset() { |
| return calcCharset((ContentTypeField) getHeader().getField(FieldName.CONTENT_TYPE)); |
| } |
| |
| /** |
| * Determines the transfer encoding of this <code>Entity</code>. |
| * |
| * @return the transfer encoding. |
| */ |
| public String getContentTransferEncoding() { |
| ContentTransferEncodingField f = (ContentTransferEncodingField) |
| getHeader().getField(FieldName.CONTENT_TRANSFER_ENCODING); |
| |
| return calcTransferEncoding(f); |
| } |
| |
| /** |
| * Return the disposition type of the content disposition of this |
| * <code>Entity</code>. |
| * |
| * @return the disposition type or <code>null</code> if no disposition |
| * type has been set. |
| */ |
| public String getDispositionType() { |
| ContentDispositionField field = obtainField(FieldName.CONTENT_DISPOSITION); |
| if (field == null) |
| return null; |
| |
| return field.getDispositionType(); |
| } |
| |
| /** |
| * Returns the filename parameter of the content disposition of this |
| * <code>Entity</code>. |
| * |
| * @return the filename parameter of the content disposition or |
| * <code>null</code> if the filename has not been set. |
| */ |
| public String getFilename() { |
| ContentDispositionField field = obtainField(FieldName.CONTENT_DISPOSITION); |
| if (field == null) |
| return null; |
| |
| return field.getFilename(); |
| } |
| |
| /** |
| * Determines if the MIME type of this <code>Entity</code> is |
| * <code>multipart/*</code>. Since multipart-entities must have |
| * a boundary parameter in the <code>Content-Type</code> field this |
| * method returns <code>false</code> if no boundary exists. |
| * |
| * @return <code>true</code> on match, <code>false</code> otherwise. |
| */ |
| public boolean isMultipart() { |
| ContentTypeField f = getContentTypeField(); |
| return f != null |
| && f.getBoundary() != null |
| && getMimeType().startsWith( |
| ContentTypeField.TYPE_MULTIPART_PREFIX); |
| } |
| |
| /** |
| * Disposes of the body of this entity. Note that the dispose call does not |
| * get forwarded to the parent entity of this Entity. |
| * |
| * Subclasses that need to free resources should override this method and |
| * invoke super.dispose(). |
| * |
| * @see org.apache.james.mime4j.dom.Disposable#dispose() |
| */ |
| public void dispose() { |
| if (body != null) { |
| body.dispose(); |
| } |
| } |
| |
| /** |
| * Obtains the header of this entity. Creates and sets a new header if this |
| * entity's header is currently <code>null</code>. |
| * |
| * @return the header of this entity; never <code>null</code>. |
| */ |
| Header obtainHeader() { |
| if (header == null) { |
| header = new HeaderImpl(); |
| } |
| return header; |
| } |
| |
| /** |
| * Obtains the header field with the specified name. |
| * |
| * @param <F> |
| * concrete field type. |
| * @param fieldName |
| * name of the field to retrieve. |
| * @return the header field or <code>null</code> if this entity has no |
| * header or the header contains no such field. |
| */ |
| <F extends ParsedField> F obtainField(String fieldName) { |
| Header header = getHeader(); |
| if (header == null) |
| return null; |
| |
| return (F) header.getField(fieldName); |
| } |
| |
| protected abstract String calcMimeType(ContentTypeField child, ContentTypeField parent); |
| |
| protected abstract String calcTransferEncoding(ContentTransferEncodingField f); |
| |
| protected abstract String calcCharset(ContentTypeField contentType); |
| } |