/*
* Copyright 2013 the original author or authors.
*
* 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.springframework.xd.dirt.stream.completion;
import static org.springframework.xd.dirt.stream.completion.CompletionProvider.*;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.xd.dirt.module.ModuleRegistry;
import org.springframework.xd.dirt.stream.XDParser;
import org.springframework.xd.dirt.stream.dsl.CheckpointedStreamDefinitionException;
import org.springframework.xd.dirt.stream.dsl.Token;
import org.springframework.xd.dirt.stream.dsl.TokenKind;
import org.springframework.xd.module.ModuleDefinition;
import org.springframework.xd.module.ModuleDescriptor;
import org.springframework.xd.module.ModuleType;
import org.springframework.xd.module.options.ModuleOption;
import org.springframework.xd.module.options.ModuleOptionsMetadataResolver;
import org.springframework.xd.rest.domain.CompletionKind;
/**
* Provides completions for the case where the user has started to type a module option name but it is not typed in full
* yet.
*
* @author Eric Bottard
*/
@Component
public class UnfinishedOptionNameRecoveryStrategy extends
StacktraceFingerprintingCompletionRecoveryStrategy<CheckpointedStreamDefinitionException> {
private ModuleRegistry moduleRegistry;
private ModuleOptionsMetadataResolver moduleOptionsMetadataResolver;
/**
* Construct a new UnfinishedOptionNameRecoveryStrategy given the parser
*
* @param parser the parser used to parse the text the partial module definition.
* @param moduleRegistry the registry to check for the existence of the last entered module
* definition.
* @param moduleOptionsMetadataResolver the metadata resolver to use in order to create a list of proposals for
* module options that have not yet been specified.
*/
@Autowired
public UnfinishedOptionNameRecoveryStrategy(XDParser parser, ModuleRegistry moduleRegistry,
ModuleOptionsMetadataResolver moduleOptionsMetadataResolver) {
super(parser, CheckpointedStreamDefinitionException.class, "file --dir=foo --pa", "file --pa",
"file --some.composed.", "file | filter | transform --expr");
this.moduleRegistry = moduleRegistry;
this.moduleOptionsMetadataResolver = moduleOptionsMetadataResolver;
}
@Override
public void addProposals(String dsl, CheckpointedStreamDefinitionException exception, CompletionKind kind, int detailLevel,
List<String> proposals) {
String safe = exception.getExpressionStringUntilCheckpoint();
List<Token> tokens = exception.getTokens();
int tokenPointer = tokens.size() - 1;
while (!tokens.get(tokenPointer - 1).isKind(TokenKind.DOUBLE_MINUS)) {
tokenPointer--;
}
StringBuilder prefix = null;
for (prefix = new StringBuilder(); tokenPointer < tokens.size(); tokenPointer++) {
Token t = tokens.get(tokenPointer);
if (t.isIdentifier()) {
prefix.append(t.stringValue());
}
else {
prefix.append(t.getKind().getTokenChars());
}
}
List<ModuleDescriptor> parsed = parser.parse("__dummy", safe, toParsingContext(kind));
// List is in reverse order
ModuleDescriptor lastModule = parsed.get(0);
String lastModuleName = lastModule.getModuleName();
ModuleType lastModuleType = lastModule.getType();
ModuleDefinition lastModuleDefinition = moduleRegistry.findDefinition(lastModuleName, lastModuleType);
Set<String> alreadyPresentOptions = new HashSet<String>(lastModule.getParameters().keySet());
for (ModuleOption option : moduleOptionsMetadataResolver.resolve(lastModuleDefinition)) {
if (shouldShowOption(option, detailLevel) && !alreadyPresentOptions.contains(option.getName())
&& option.getName().startsWith(prefix.toString())) {
proposals.add(String.format("%s --%s=", safe, option.getName()));
}
}
}
}