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- /*
- Copyright (c) 2010 James Ahlborn
-
- 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.healthmarketscience.jackcess.util;
-
- import java.io.IOException;
-
- import com.healthmarketscience.jackcess.DataType;
- import com.healthmarketscience.jackcess.RuntimeIOException;
- import com.healthmarketscience.jackcess.Table;
- import com.healthmarketscience.jackcess.impl.ColumnImpl;
-
- /**
- * Concrete implementation of ColumnMatcher which tests textual columns
- * case-insensitively ({@link DataType#TEXT} and {@link DataType#MEMO}), and
- * all other columns using simple equality.
- *
- * @author James Ahlborn
- * @usage _general_class_
- */
- public class CaseInsensitiveColumnMatcher implements ColumnMatcher {
-
- public static final CaseInsensitiveColumnMatcher INSTANCE =
- new CaseInsensitiveColumnMatcher();
-
-
- @Override
- public boolean matches(Table table, String columnName, Object value1,
- Object value2)
- {
- if(!table.getColumn(columnName).getType().isTextual()) {
- // use simple equality
- return SimpleColumnMatcher.INSTANCE.matches(table, columnName,
- value1, value2);
- }
-
- // convert both values to Strings and compare case-insensitively
- try {
- CharSequence cs1 = ColumnImpl.toCharSequence(value1);
- CharSequence cs2 = ColumnImpl.toCharSequence(value2);
-
- return((cs1 == cs2) ||
- ((cs1 != null) && (cs2 != null) &&
- cs1.toString().equalsIgnoreCase(cs2.toString())));
- } catch(IOException e) {
- throw new RuntimeIOException("Could not read column " + columnName
- + " value", e);
- }
- }
-
- }
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