/**
* 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 org.waveprotocol.wave.model.operation.testing;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;
import org.waveprotocol.wave.model.operation.testing.StringDomain.Data;
import org.waveprotocol.wave.model.operation.testing.StringDomain.StringOp;
import org.waveprotocol.wave.model.operation.testing.StringDomain.StringOp.Component;
import org.waveprotocol.wave.model.operation.testing.StringDomain.StringOp.Delete;
import org.waveprotocol.wave.model.operation.testing.StringDomain.StringOp.Insert;
import org.waveprotocol.wave.model.operation.testing.StringDomain.StringOp.Skip;
public class StringOpGenerator implements RandomOpGenerator<Data, StringOp> {
final int maxComponents = 20;
@Override
public StringOp randomOperation(Data state, Random random) {
int numComponents = random.nextInt(maxComponents);
List<Component> components = new ArrayList<Component>();
String str = state.toString();
int remainingLength = str.length();
while (numComponents > 0 && remainingLength >= 0) {
if (remainingLength == 0) {
components.add(new Insert((char) (random.nextInt(26) + 'A')));
} else {
switch (random.nextInt(3)) {
case 0:
components.add(new Insert((char) (random.nextInt(26) + 'A')));
break;
case 1:
components.add(new Delete(str.charAt(str.length() - remainingLength)));
remainingLength--;
break;
default:
components.add(Skip.INSTANCE);
remainingLength--;
break;
}
}
numComponents--;
}
StringOp op = new StringOp(components);
return op;
}
}