/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* MetaMatrix, Inc - repackaging and updates for use as a metadata store
*******************************************************************************/
package org.teiid.internal.core.index;
import java.util.Arrays;
/**
* An indexBlock stores wordEntries.
*/
public abstract class IndexBlock extends Block {
public IndexBlock(int blockSize) {
super(blockSize);
}
public WordEntry findEntryPrefixedBy(char[] word, boolean isCaseSensitive) {
reset();
WordEntry entry= new WordEntry();
while (nextEntry(entry)) {
if (CharOperation.prefixEquals(entry.getWord(), word, isCaseSensitive)) {
return entry;
}
}
return null;
}
public WordEntry findExactEntry(char[] word) {
reset();
WordEntry entry= new WordEntry();
while (nextEntry(entry)) {
if (Arrays.equals(entry.getWord(), word)) {
return entry;
}
}
return null;
}
/**
* Returns whether the block is empty or not (if it doesn't contain any wordEntry).
*/
public abstract boolean isEmpty();
/**
* Finds the next wordEntry and stores it in the given entry.
*/
public abstract boolean nextEntry(WordEntry entry);
public void reset() {
}
}