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/*
* Copyright 2006-2010 Amazon Technologies, Inc. or its affiliates.
* Amazon, Amazon.com and Carbonado are trademarks or registered trademarks
* of Amazon Technologies, Inc. or its affiliates. All rights reserved.
*
* 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.amazon.carbonado.spi;
import java.util.Arrays;
import com.amazon.carbonado.capability.IndexInfo;
import com.amazon.carbonado.info.Direction;
/**
* Basic implementation of an {@link IndexInfo}.
*
* @author Brian S O'Neill
*/
public class IndexInfoImpl implements IndexInfo {
private final String mName;
private final boolean mUnique;
private final boolean mClustered;
private final String[] mPropertyNames;
private final Direction[] mPropertyDirections;
/**
* @param name optional name for index
* @param unique true if index requires unique values
* @param propertyNames required list of property names, must have at least
* one name
* @param propertyDirections optional property directions, may be null or
* same length as property names array
* @throws IllegalArgumentException
*/
public IndexInfoImpl(String name, boolean unique, boolean clustered,
String[] propertyNames, Direction[] propertyDirections) {
mName = name;
mUnique = unique;
mClustered = clustered;
if (propertyNames == null || propertyNames.length == 0) {
throw new IllegalArgumentException();
}
for (int i=propertyNames.length; --i>=0; ) {
if (propertyNames[i] == null) {
throw new IllegalArgumentException();
}
}
propertyNames = propertyNames.clone();
if (propertyDirections == null) {
propertyDirections = new Direction[propertyNames.length];
} else {
if (propertyNames.length != propertyDirections.length) {
throw new IllegalArgumentException();
}
propertyDirections = propertyDirections.clone();
}
for (int i=propertyDirections.length; --i>=0; ) {
if (propertyDirections[i] == null) {
propertyDirections[i] = Direction.UNSPECIFIED;
}
}
mPropertyNames = propertyNames;
mPropertyDirections = propertyDirections;
}
public String getName() {
return mName;
}
public boolean isUnique() {
return mUnique;
}
public boolean isClustered() {
return mClustered;
}
public String[] getPropertyNames() {
return mPropertyNames.clone();
}
public Direction[] getPropertyDirections() {
return mPropertyDirections.clone();
}
@Override
public String toString() {
StringBuilder b = new StringBuilder();
b.append("IndexInfo {name=");
b.append(mName);
b.append(", unique=");
b.append(mUnique);
b.append(", propertyNames=");
b.append(Arrays.toString(mPropertyNames));
b.append(", propertyDirections=");
b.append(Arrays.toString(mPropertyDirections));
b.append('}');
return b.toString();
}
}
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