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package net.sf.basedb.reggie.plugins; |
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import java.util.Date; |
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import net.sf.basedb.core.InvalidDataException; |
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import net.sf.basedb.util.parser.FlatFileParser.Data; |
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import net.sf.basedb.util.parser.Mapper; |
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/** |
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Mapper implementation that wrap another mapper and throws |
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an exception if the mapped value is null. This is useful |
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to force non-null values in data files. |
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@since 4.25 |
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*/ |
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public class NotNullMapper |
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implements Mapper |
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{ |
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/** |
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Wrap the parent if it exists. If the parent is null, null |
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is returned. The given 'ifNullMessage' is thrown in an |
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InvalidDataException if the mapped value is null. |
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*/ |
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public static NotNullMapper wrap(String ifNullMessage, Mapper parent) |
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{ |
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return parent == null ? null : new NotNullMapper(ifNullMessage, parent); |
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} |
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private final String ifNullMessage; |
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private final Mapper parent; |
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public NotNullMapper(String ifNullMessage, Mapper parent) |
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{ |
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this.parent = parent; |
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this.ifNullMessage = ifNullMessage; |
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} |
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@Override |
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public Date getDate(Data data) |
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{ |
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return check(parent.getDate(data)); |
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} |
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@Override |
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public Double getDouble(Data data) |
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{ |
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return check(parent.getDouble(data)); |
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} |
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@Override |
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public Float getFloat(Data data) |
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{ |
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return check(parent.getFloat(data)); |
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} |
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@Override |
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public Integer getInt(Data data) |
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{ |
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return check(parent.getInt(data)); |
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} |
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@Override |
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public Long getLong(Data data) |
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{ |
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return check(parent.getLong(data)); |
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} |
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@Override |
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public String getString(Data data) |
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{ |
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return check(parent.getString(data)); |
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} |
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@Override |
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@Deprecated |
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public String getValue(Data data) |
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{ |
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return check(parent.getString(data)); |
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} |
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private <T> T check(T value) |
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{ |
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if (value == null) throw new InvalidDataException(ifNullMessage); |
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return value; |
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} |
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} |