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* 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.jsieve.parser.address;
import java.io.Reader;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import org.apache.jsieve.mail.MailAdapter;
import org.apache.jsieve.mail.MailAdapter.Address;
import org.apache.jsieve.parser.generated.address.ASTaddr_spec;
import org.apache.jsieve.parser.generated.address.ASTaddress_list;
import org.apache.jsieve.parser.generated.address.ASTdomain;
import org.apache.jsieve.parser.generated.address.ASTlocal_part;
import org.apache.jsieve.parser.generated.address.AddressListParser;
import org.apache.jsieve.parser.generated.address.ParseException;
import org.apache.jsieve.parser.generated.address.Token;
/**
* Builds <code>MailAdapter.Address</code> from address lists. Note that
* implementators of {@link MailAdapter} are recommended to use a fully featured
* and maintained parser such as <a href='http://james.apache.org/mime4j'>Apache
* Mime4J</a>. This implementation is based on Mime4J code but is intended only
* for internal and demonstration purposes. It is not actively maintained.
*/
public class SieveAddressBuilder {
private static final Address[] EMPTY_ADDRESSES = {};
private final Collection addresses;
private final Worker worker;
public SieveAddressBuilder() {
addresses = Collections.synchronizedCollection(new ArrayList());
worker = new Worker();
}
/**
* Clears the addresses currently accumulated.
*/
public void reset() {
addresses.clear();
}
/**
* Adds addresses in the given list.
*
* @param addressList
* RFC822 address list
* @throws ParseException
*/
public void addAddresses(String addressList) throws ParseException {
final StringReader reader = new StringReader(addressList);
worker.addAddressses(reader, addresses);
}
/**
* Gets addresses currently accumulated by calls to
* {@link #addAddresses(String)} since the last call to {@link #reset}.
*
* @return addresses, not null
*/
public Address[] getAddresses() {
final Address[] results = (Address[]) addresses
.toArray(EMPTY_ADDRESSES);
return results;
}
/**
* Performs the actual work. Factored into an inner class so that the build
* interface is clean.
*/
private final class Worker extends BaseAddressListVisitor {
public void addAddressses(final Reader reader, final Collection results)
throws ParseException {
AddressListParser parser = new AddressListParser(reader);
ASTaddress_list root = parser.parse();
root.childrenAccept(this, results);
}
public Object visit(ASTaddr_spec node, Object data) {
final AddressBean address = new AddressBean();
node.childrenAccept(this, address);
if (data instanceof Collection) {
final Collection collection = (Collection) data;
collection.add(address);
}
return data;
}
public Object visit(final ASTdomain node, final Object data) {
if (data instanceof AddressBean) {
final AddressBean address = (AddressBean) data;
final String domain = contents(node);
address.setDomain(domain);
}
return data;
}
public Object visit(ASTlocal_part node, Object data) {
if (data instanceof AddressBean) {
final AddressBean address = (AddressBean) data;
final String localPart = contents(node);
address.setLocalPart(localPart);
}
return data;
}
private String contents(AddressNode node) {
StringBuffer buffer = new StringBuffer(32);
Token last = node.lastToken;
Token next = node.firstToken;
while (next != last) {
buffer.append(next.image);
next = next.next;
}
buffer.append(last.image);
return buffer.toString();
}
}
/**
* Bean based address implementation.
*/
private final class AddressBean implements Address {
private String localPart;
private String domain;
public AddressBean() {
localPart = "";
domain = "";
}
public String getDomain() {
return domain;
}
public void setDomain(String domain) {
this.domain = domain;
}
public String getLocalPart() {
return localPart;
}
public void setLocalPart(String localPart) {
this.localPart = localPart;
}
}
}