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/*
Copyright (c) 2013 James Ahlborn
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA
*/
package com.healthmarketscience.jackcess.util;
import java.util.AbstractMap;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import com.healthmarketscience.jackcess.Column;
import com.healthmarketscience.jackcess.Cursor;
import com.healthmarketscience.jackcess.Row;
import com.healthmarketscience.jackcess.impl.CursorImpl;
/**
* Builder style class for constructing a Cursor Iterable/Iterator.
*
* @author James Ahlborn
*/
public class IterableBuilder implements Iterable<Row>
{
public enum Type {
SIMPLE, COLUMN_MATCH, ROW_MATCH;
}
private final Cursor _cursor;
private Type _type = Type.SIMPLE;
private boolean _forward = true;
private boolean _reset = true;
private Collection<String> _columnNames;
private ColumnMatcher _columnMatcher;
private Object _matchPattern;
public IterableBuilder(Cursor cursor) {
_cursor = cursor;
}
public Collection<String> getColumnNames() {
return _columnNames;
}
public ColumnMatcher getColumnMatcher() {
return _columnMatcher;
}
public boolean isForward() {
return _forward;
}
public boolean isReset() {
return _reset;
}
/**
* @usage _advanced_method_
*/
public Object getMatchPattern() {
return _matchPattern;
}
/**
* @usage _advanced_method_
*/
public Type getType() {
return _type;
}
public IterableBuilder forward() {
return setForward(true);
}
public IterableBuilder reverse() {
return setForward(false);
}
public IterableBuilder setForward(boolean forward) {
_forward = forward;
return this;
}
public IterableBuilder reset(boolean reset) {
_reset = reset;
return this;
}
public IterableBuilder setColumnNames(Collection<String> columnNames) {
_columnNames = columnNames;
return this;
}
public IterableBuilder addColumnNames(Iterable<String> columnNames) {
if(columnNames != null) {
for(String name : columnNames) {
addColumnName(name);
}
}
return this;
}
public IterableBuilder addColumns(Iterable<? extends Column> cols) {
if(cols != null) {
for(Column col : cols) {
addColumnName(col.getName());
}
}
return this;
}
public IterableBuilder addColumnNames(String... columnNames) {
if(columnNames != null) {
for(String name : columnNames) {
addColumnName(name);
}
}
return this;
}
private void addColumnName(String columnName) {
if(_columnNames == null) {
_columnNames = new HashSet<String>();
}
_columnNames.add(columnName);
}
public IterableBuilder setMatchPattern(Column columnPattern,
Object valuePattern) {
_type = Type.COLUMN_MATCH;
_matchPattern = new AbstractMap.SimpleImmutableEntry<Column,Object>(
columnPattern, valuePattern);
return this;
}
public IterableBuilder setMatchPattern(String columnNamePattern,
Object valuePattern) {
return setMatchPattern(_cursor.getTable().getColumn(columnNamePattern),
valuePattern);
}
public IterableBuilder setMatchPattern(Map<String,?> rowPattern) {
_type = Type.ROW_MATCH;
_matchPattern = rowPattern;
return this;
}
public IterableBuilder addMatchPattern(String columnNamePattern,
Object valuePattern)
{
_type = Type.ROW_MATCH;
@SuppressWarnings("unchecked")
Map<String,Object> matchPattern = ((Map<String,Object>)_matchPattern);
if(matchPattern == null) {
matchPattern = new HashMap<String,Object>();
_matchPattern = matchPattern;
}
matchPattern.put(columnNamePattern, valuePattern);
return this;
}
public IterableBuilder setColumnMatcher(ColumnMatcher columnMatcher) {
_columnMatcher = columnMatcher;
return this;
}
public Iterator<Row> iterator() {
return ((CursorImpl)_cursor).iterator(this);
}
}
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