/*
* Copyright 2007-2010 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.impalaframework.module.source;
import java.util.LinkedList;
import java.util.List;
import org.impalaframework.exception.ConfigurationException;
import org.impalaframework.module.ModuleDefinition;
import org.impalaframework.module.definition.SimpleModuleDefinition;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
class SingleStringSourceDelegate {
private ModuleDefinition moduleDefinition;
private String definitionString;
SingleStringSourceDelegate(ModuleDefinition moduleDefinition, String definitionString) {
super();
Assert.notNull(moduleDefinition);
Assert.notNull(definitionString);
this.moduleDefinition = moduleDefinition;
this.definitionString = definitionString;
}
ModuleDefinition getModuleDefinition() {
if (StringUtils.hasText(definitionString)) {
String[] moduleNames = doDefinitionSplit();
for (String moduleName : moduleNames) {
new SimpleModuleDefinition(moduleDefinition, moduleName);
}
}
return moduleDefinition;
}
String[] doDefinitionSplit() {
List<Integer> indexes = new LinkedList<Integer>();
char[] chars = definitionString.toCharArray();
boolean inOverrides = false;
indexes.add(-1);
for (int i = 0; i < chars.length; i++) {
if (chars[i] == '(') {
if (inOverrides) {
invalidChar(chars, i);
}
inOverrides = true;
}
if (chars[i] == ')') {
if (!inOverrides) {
invalidChar(chars, i);
}
inOverrides = false;
}
if (chars[i] == ',') {
if (!inOverrides) {
indexes.add(i);
}
}
}
// add the length as the last index
indexes.add(definitionString.length());
List<String> segments = new LinkedList<String>();
String moduleString = this.definitionString;
for (int i = 1; i < indexes.size(); i++) {
segments.add(moduleString.substring(indexes.get(i - 1) + 1, indexes.get(i)));
}
// convert to array
String[] moduleNames = segments.toArray(new String[segments.size()]);
// trim
for (int i = 0; i < moduleNames.length; i++) {
moduleNames[i] = moduleNames[i].trim();
}
return moduleNames;
}
private void invalidChar(char[] chars, int i) {
throw new ConfigurationException("Invalid definition string " + definitionString + ". Invalid character '" + chars[i]
+ "' at column " + (i + 1));
}
}