/**
*
*/
package org.appfuse.webapp.client.application;
import static com.google.web.bindery.autobean.shared.AutoBeanUtils.getAutoBean;
import java.util.HashMap;
import java.util.Map;
import org.appfuse.webapp.client.proxies.UserProxy;
import org.appfuse.webapp.client.proxies.UsersSearchCriteriaProxy;
import org.appfuse.webapp.client.requests.ApplicationRequestFactory;
import com.google.gwt.core.shared.GWT;
import com.google.inject.Inject;
import com.google.web.bindery.autobean.shared.AutoBean;
import com.google.web.bindery.autobean.shared.AutoBeanCodex;
import com.google.web.bindery.autobean.shared.AutoBeanFactory;
import com.google.web.bindery.requestfactory.shared.BaseProxy;
import com.google.web.bindery.requestfactory.shared.EntityProxy;
import com.google.web.bindery.requestfactory.shared.impl.AbstractRequestFactory;
import com.google.web.bindery.requestfactory.shared.impl.Constants;
/**
* @author ivangsa
*
*/
public class ApplicationProxyFactory {
private static final Map<Class<? extends EntityProxy>, Class<?>> SEARCH_CRITERIA_TYPES_MAP = new HashMap<Class<? extends EntityProxy>, Class<?>>();
static {
// You need to map proxyClass - searchCriteria.getClass() here
// for automatic serialization of the search criteria to the history
// token, as
// there is no way to re-generate a class object, that is not an
// EntityProxy.class, from a token string
SEARCH_CRITERIA_TYPES_MAP.put(UserProxy.class, UsersSearchCriteriaProxy.class);
}
//
public interface NonPublicProxyFactory extends AutoBeanFactory {
AutoBean<UsersSearchCriteriaProxy> searchCriteria();
}
private NonPublicProxyFactory autoBeanFactory = GWT.create(NonPublicProxyFactory.class);
private final ApplicationRequestFactory requests;
/**
* @param requests
*/
@Inject
public ApplicationProxyFactory(ApplicationRequestFactory requests) {
super();
this.requests = requests;
}
public Class<?> getSearchCriteriaTypeForProxy(Class<? extends EntityProxy> proxyType) {
return SEARCH_CRITERIA_TYPES_MAP.get(proxyType);
};
/**
*
* @param proxyType
* @return
*/
public <T extends BaseProxy> T create(Class<T> proxyType) {
AutoBean<T> autoBean = autoBeanFactory.create(proxyType);
allocateId(autoBean);
return autoBean.as();
}
public <T extends BaseProxy> T clone(T proxy) {
Class proxyType = getAutoBean(proxy).getType();
return (T) deserialize(proxyType, serialize(proxy));
}
/**
* Serialized an object into a string.
*
* It only provides serialization out-of-the-box for {@link BaseProxy}
* objects. You may need to provide your own serialization for your custom
* types.
*
* @param object
* @return
*/
public String serialize(Object object) {
if (object instanceof BaseProxy) {
return serializeProxy((BaseProxy) object);
}
// Provide here your own serialization
return "";
}
/**
* Deserializes a string, previously serialized by
* {@link #serialize(Object)}, into its object form.
*
* It only provides out-of-the-box deserialization for configured
* {@link BaseProxy} objects. You may need to provide your own serialization
* for your custom types.
*
* @param type
* @param key
* @return
*/
public Object deserialize(Class<?> type, String key) {
if (String.class.equals(type)) {
return key;
} else if (autoBeanFactory.create(type) != null) {
return deserializeProxy((Class<BaseProxy>) type, key);
}
// Provide here your own serialization
return null;
}
/**
*
* @param proxy
* @return
*/
public <T extends BaseProxy> String serializeProxy(T proxy) {
try {
String serialized = AutoBeanCodex.encode(getAutoBean(proxy)).getPayload();
return base64encode(serialized);
} catch (Exception e) {
e.printStackTrace();// for dev mode
return "";
}
}
/**
*
* @param proxyType
* @param key
* @return
*/
public <T extends BaseProxy> T deserializeProxy(Class<T> proxyType, String key) {
try {
T proxy = AutoBeanCodex.decode(autoBeanFactory, proxyType, base64decode(key)).as();
allocateId((AutoBean) getAutoBean(proxy));
return proxy;
} catch (Exception e) {
e.printStackTrace();// for dev mode
return null;
}
}
public <T extends BaseProxy> AutoBean<T> allocateId(AutoBean<T> autoBean) {
Object id = ((AbstractRequestFactory) requests).allocateId(autoBean.getType());
autoBean.setTag(Constants.STABLE_ID, id);
return autoBean;
}
/**
*
* @param proxy
* @param frozen
*/
public <T extends BaseProxy> void setFrozen(T proxy, boolean frozen) {
getAutoBean(proxy).setFrozen(frozen);
}
// these don't work on <= IE8
// private static native String base64encode(String a) /*-{
// return window.btoa(a);
// }-*/;
//
// private static native String base64decode(String b) /*-{
// return window.atob(b);
// }-*/;
private static String base64encode(String a) {
return Base64Coder.encodeString(a);
};
private static String base64decode(String b) {
return Base64Coder.decodeString(b);
}
}
//
// http://www.source-code.biz/base64coder/java/Base64Coder.java.txt
//
// Copyright 2003-2010 Christian d'Heureuse, Inventec Informatik AG, Zurich,
// Switzerland
// www.source-code.biz, www.inventec.ch/chdh
//
// This module is multi-licensed and may be used under the terms
// of any of the following licenses:
//
// EPL, Eclipse Public License, V1.0 or later, http://www.eclipse.org/legal
// LGPL, GNU Lesser General Public License, V2.1 or later,
// http://www.gnu.org/licenses/lgpl.html
// GPL, GNU General Public License, V2 or later,
// http://www.gnu.org/licenses/gpl.html
// AL, Apache License, V2.0 or later, http://www.apache.org/licenses
// BSD, BSD License, http://www.opensource.org/licenses/bsd-license.php
// MIT, MIT License, http://www.opensource.org/licenses/MIT
//
// Please contact the author if you need another license.
// This module is provided "as is", without warranties of any kind.
/**
* A Base64 encoder/decoder.
*
* <p>
* This class is used to encode and decode data in Base64 format as described in
* RFC 1521.
*
* <p>
* Project home page: <a
* href="http://www.source-code.biz/base64coder/java/">www.
* source-code.biz/base64coder/java</a><br>
* Author: Christian d'Heureuse, Inventec Informatik AG, Zurich, Switzerland<br>
* Multi-licensed: EPL / LGPL / GPL / AL / BSD / MIT.
*/
class Base64Coder {
// Mapping table from 6-bit nibbles to Base64 characters.
private static final char[] map1 = new char[64];
static {
int i = 0;
for (char c = 'A'; c <= 'Z'; c++)
map1[i++] = c;
for (char c = 'a'; c <= 'z'; c++)
map1[i++] = c;
for (char c = '0'; c <= '9'; c++)
map1[i++] = c;
map1[i++] = '+';
map1[i++] = '/';
}
// Mapping table from Base64 characters to 6-bit nibbles.
private static final byte[] map2 = new byte[128];
static {
for (int i = 0; i < map2.length; i++)
map2[i] = -1;
for (int i = 0; i < 64; i++)
map2[map1[i]] = (byte) i;
}
/**
* Encodes a string into Base64 format. No blanks or line breaks are
* inserted.
*
* @param s
* A String to be encoded.
* @return A String containing the Base64 encoded data.
*/
public static String encodeString(String s) {
return new String(encode(s.getBytes()));
}
/**
* Encodes a byte array into Base64 format. No blanks or line breaks are
* inserted in the output.
*
* @param in
* An array containing the data bytes to be encoded.
* @return A character array containing the Base64 encoded data.
*/
public static char[] encode(byte[] in) {
return encode(in, 0, in.length);
}
/**
* Encodes a byte array into Base64 format. No blanks or line breaks are
* inserted in the output.
*
* @param in
* An array containing the data bytes to be encoded.
* @param iLen
* Number of bytes to process in <code>in</code>.
* @return A character array containing the Base64 encoded data.
*/
public static char[] encode(byte[] in, int iLen) {
return encode(in, 0, iLen);
}
/**
* Encodes a byte array into Base64 format. No blanks or line breaks are
* inserted in the output.
*
* @param in
* An array containing the data bytes to be encoded.
* @param iOff
* Offset of the first byte in <code>in</code> to be processed.
* @param iLen
* Number of bytes to process in <code>in</code>, starting at
* <code>iOff</code>.
* @return A character array containing the Base64 encoded data.
*/
public static char[] encode(byte[] in, int iOff, int iLen) {
int oDataLen = (iLen * 4 + 2) / 3; // output length without padding
int oLen = ((iLen + 2) / 3) * 4; // output length including padding
char[] out = new char[oLen];
int ip = iOff;
int iEnd = iOff + iLen;
int op = 0;
while (ip < iEnd) {
int i0 = in[ip++] & 0xff;
int i1 = ip < iEnd ? in[ip++] & 0xff : 0;
int i2 = ip < iEnd ? in[ip++] & 0xff : 0;
int o0 = i0 >>> 2;
int o1 = ((i0 & 3) << 4) | (i1 >>> 4);
int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
int o3 = i2 & 0x3F;
out[op++] = map1[o0];
out[op++] = map1[o1];
out[op] = op < oDataLen ? map1[o2] : '=';
op++;
out[op] = op < oDataLen ? map1[o3] : '=';
op++;
}
return out;
}
/**
* Decodes a string from Base64 format. No blanks or line breaks are allowed
* within the Base64 encoded input data.
*
* @param s
* A Base64 String to be decoded.
* @return A String containing the decoded data.
* @throws IllegalArgumentException
* If the input is not valid Base64 encoded data.
*/
public static String decodeString(String s) {
return new String(decode(s));
}
/**
* Decodes a byte array from Base64 format and ignores line separators, tabs
* and blanks. CR, LF, Tab and Space characters are ignored in the input
* data. This method is compatible with
* <code>sun.misc.BASE64Decoder.decodeBuffer(String)</code>.
*
* @param s
* A Base64 String to be decoded.
* @return An array containing the decoded data bytes.
* @throws IllegalArgumentException
* If the input is not valid Base64 encoded data.
*/
public static byte[] decodeLines(String s) {
char[] buf = new char[s.length()];
int p = 0;
for (int ip = 0; ip < s.length(); ip++) {
char c = s.charAt(ip);
if (c != ' ' && c != '\r' && c != '\n' && c != '\t')
buf[p++] = c;
}
return decode(buf, 0, p);
}
/**
* Decodes a byte array from Base64 format. No blanks or line breaks are
* allowed within the Base64 encoded input data.
*
* @param s
* A Base64 String to be decoded.
* @return An array containing the decoded data bytes.
* @throws IllegalArgumentException
* If the input is not valid Base64 encoded data.
*/
public static byte[] decode(String s) {
return decode(s.toCharArray());
}
/**
* Decodes a byte array from Base64 format. No blanks or line breaks are
* allowed within the Base64 encoded input data.
*
* @param in
* A character array containing the Base64 encoded data.
* @return An array containing the decoded data bytes.
* @throws IllegalArgumentException
* If the input is not valid Base64 encoded data.
*/
public static byte[] decode(char[] in) {
return decode(in, 0, in.length);
}
/**
* Decodes a byte array from Base64 format. No blanks or line breaks are
* allowed within the Base64 encoded input data.
*
* @param in
* A character array containing the Base64 encoded data.
* @param iOff
* Offset of the first character in <code>in</code> to be
* processed.
* @param iLen
* Number of characters to process in <code>in</code>, starting
* at <code>iOff</code>.
* @return An array containing the decoded data bytes.
* @throws IllegalArgumentException
* If the input is not valid Base64 encoded data.
*/
public static byte[] decode(char[] in, int iOff, int iLen) {
if (iLen % 4 != 0)
throw new IllegalArgumentException("Length of Base64 encoded input string is not a multiple of 4.");
while (iLen > 0 && in[iOff + iLen - 1] == '=')
iLen--;
int oLen = (iLen * 3) / 4;
byte[] out = new byte[oLen];
int ip = iOff;
int iEnd = iOff + iLen;
int op = 0;
while (ip < iEnd) {
int i0 = in[ip++];
int i1 = in[ip++];
int i2 = ip < iEnd ? in[ip++] : 'A';
int i3 = ip < iEnd ? in[ip++] : 'A';
if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)
throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
int b0 = map2[i0];
int b1 = map2[i1];
int b2 = map2[i2];
int b3 = map2[i3];
if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)
throw new IllegalArgumentException("Illegal character in Base64 encoded data.");
int o0 = (b0 << 2) | (b1 >>> 4);
int o1 = ((b1 & 0xf) << 4) | (b2 >>> 2);
int o2 = ((b2 & 3) << 6) | b3;
out[op++] = (byte) o0;
if (op < oLen)
out[op++] = (byte) o1;
if (op < oLen)
out[op++] = (byte) o2;
}
return out;
}
// Dummy constructor.
private Base64Coder() {
}
} // end class Base64Coder