/*
* Copyright 2009 Google Inc.
*
* 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.google.gwt.user.linker.rpc;
import com.google.gwt.core.ext.LinkerContext;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.AbstractLinker;
import com.google.gwt.core.ext.linker.ArtifactSet;
import com.google.gwt.core.ext.linker.EmittedArtifact;
import com.google.gwt.core.ext.linker.EmittedArtifact.Visibility;
import com.google.gwt.core.ext.linker.LinkerOrder;
import com.google.gwt.core.ext.linker.LinkerOrder.Order;
import com.google.gwt.core.ext.linker.Shardable;
import com.google.gwt.core.ext.linker.SyntheticArtifact;
import com.google.gwt.dev.jjs.InternalCompilerException;
import com.google.gwt.dev.util.Util;
import com.google.gwt.user.rebind.rpc.ProxyCreator;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
/**
* Emit a file containing a map of RPC proxy classes to the partial path of the
* RPC policy file.
*/
@LinkerOrder(Order.PRE)
@Shardable
public class RpcPolicyManifestLinker extends AbstractLinker {
private static final String MANIFEST_TXT = "manifest.txt";
/**
* The main body of the manifest. It is built up as per-permutation manifests
* are looped over.
*/
private StringBuilder manifestBody = new StringBuilder();
@Override
public String getDescription() {
return "RPC policy file manifest";
}
@Override
public ArtifactSet link(TreeLogger logger, LinkerContext context,
ArtifactSet artifacts, boolean onePermutation)
throws UnableToCompleteException {
if (onePermutation) {
return artifacts;
} else {
for (EmittedArtifact art : artifacts.find(EmittedArtifact.class)) {
if (art.getPartialPath().startsWith(ProxyCreator.MANIFEST_ARTIFACT_DIR)) {
readOneManifest(logger, art.getContents(logger));
}
}
ArtifactSet toReturn = new ArtifactSet(artifacts);
SyntheticArtifact manifestArt = emitString(logger,
generateManifest(context), MANIFEST_TXT);
manifestArt.setVisibility(Visibility.LegacyDeploy);
toReturn.add(manifestArt);
return toReturn;
}
}
/**
* Compute a manifest for all RPC policy files seen so far.
*/
private String generateManifest(LinkerContext context) {
StringBuilder sb = new StringBuilder();
sb.append("# Module " + context.getModuleName() + "\n");
sb.append("# RPC service class, partial path of RPC policy file\n");
sb.append(manifestBody.toString());
return sb.toString();
}
/**
* Read one manifest and close the input stream.
*/
private void readOneManifest(TreeLogger logger, InputStream manifestStream)
throws UnableToCompleteException {
Map<String, String> entries = new HashMap<String, String>();
try {
BufferedReader reader = new BufferedReader(new InputStreamReader(
manifestStream, Util.DEFAULT_ENCODING));
String line;
while ((line = reader.readLine()) != null) {
int idx = line.indexOf(':');
if (idx < 0) {
throw new InternalCompilerException(
"invalid selection information line: " + line);
}
String propName = line.substring(0, idx).trim();
String propValue = line.substring(idx + 1).trim();
entries.put(propName, propValue);
}
reader.close();
} catch (IOException e) {
logger.log(TreeLogger.ERROR, "Unexpected IOException", e);
throw new UnableToCompleteException();
}
String serviceClass = entries.get("serviceClass");
if (serviceClass == null) {
logger.log(TreeLogger.ERROR,
"Internal error: manifest file does not include a serviceClass");
throw new UnableToCompleteException();
}
String path = entries.get("path");
if (path == null) {
logger.log(TreeLogger.ERROR,
"Internal error: manifest file does not include a path");
throw new UnableToCompleteException();
}
manifestBody.append(serviceClass);
manifestBody.append(", ");
manifestBody.append(path);
manifestBody.append("\n");
}
}