typeconverter.html
来自「ONGL学习的好书,介绍ONGL的相关知识」· HTML 代码 · 共 238 行
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TypeConverter (OGNL)
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ognl</FONT>
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Interface TypeConverter</H2>
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<DT><B>All Known Implementing Classes:</B> <DD><A HREF="../ognl/DefaultTypeConverter.html" title="class in ognl">DefaultTypeConverter</A></DD>
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<DT>public interface <B>TypeConverter</B></DL>
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Interface for accessing the type conversion facilities within a context.
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<DT><B>Author:</B></DT> <DD>Luke Blanshard (blanshlu@netscape.net), Drew Davidson (drew@ognl.org)</DD></DL>
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<CODE> java.lang.Object</CODE></FONT></TD>
<TD><CODE><B><A HREF="../ognl/TypeConverter.html#convertValue(java.util.Map, java.lang.Object, java.lang.reflect.Member, java.lang.String, java.lang.Object, java.lang.Class)">convertValue</A></B>(java.util.Map context, java.lang.Object target, java.lang.reflect.Member member, java.lang.String propertyName, java.lang.Object value, java.lang.Class toType)</CODE>
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Converts the given value to a given type.</TD>
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<A NAME="convertValue(java.util.Map, java.lang.Object, java.lang.reflect.Member, java.lang.String, java.lang.Object, java.lang.Class)"><!-- --></A><H3>
convertValue</H3>
<PRE>
public java.lang.Object <B>convertValue</B>(java.util.Map context, java.lang.Object target, java.lang.reflect.Member member, java.lang.String propertyName, java.lang.Object value, java.lang.Class toType)</PRE>
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<DD>Converts the given value to a given type. The OGNL context, target, member and name of property being set are given. This method should be able to handle conversion in general without any context, target, member or property name specified.
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<DT><B>Parameters:</B><DD><CODE>context</CODE> - OGNL context under which the conversion is being done<DD><CODE>target</CODE> - target object in which the property is being set<DD><CODE>member</CODE> - member (Constructor, Method or Field) being set<DD><CODE>propertyName</CODE> - property name being set<DD><CODE>value</CODE> - value to be converted<DD><CODE>toType</CODE> - type to which value is converted<DT><B>Returns:</B><DD>Converted value of type toType or TypeConverter.NoConversionPossible to indicate that the conversion was not possible.</DL>
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