org.apache.taglibs.standard.lang.jstl.ComplexValue Maven / Gradle / Ivy
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package org.apache.taglibs.standard.lang.jstl;
import java.util.List;
import java.util.Map;
/**
*
* Represents a dynamic value, which consists of a prefix and an
* optional set of ValueSuffix elements. A prefix is something like
* an identifier, and a suffix is something like a "property of" or
* "indexed element of" operator.
*
* @author Nathan Abramson - Art Technology Group
* @author Shawn Bayern
* @version $Change: 181177 $$DateTime: 2001/06/26 08:45:09 $$Author: kchung $
**/
public class ComplexValue
extends Expression
{
//-------------------------------------
// Properties
//-------------------------------------
// property prefix
Expression mPrefix;
public Expression getPrefix ()
{ return mPrefix; }
public void setPrefix (Expression pPrefix)
{ mPrefix = pPrefix; }
//-------------------------------------
// property suffixes
List mSuffixes;
public List getSuffixes ()
{ return mSuffixes; }
public void setSuffixes (List pSuffixes)
{ mSuffixes = pSuffixes; }
//-------------------------------------
/**
*
* Constructor
**/
public ComplexValue (Expression pPrefix,
List pSuffixes)
{
mPrefix = pPrefix;
mSuffixes = pSuffixes;
}
//-------------------------------------
// Expression methods
//-------------------------------------
/**
*
* Returns the expression in the expression language syntax
**/
public String getExpressionString ()
{
StringBuffer buf = new StringBuffer ();
buf.append (mPrefix.getExpressionString ());
for (int i = 0; mSuffixes != null && i < mSuffixes.size (); i++) {
ValueSuffix suffix = (ValueSuffix) mSuffixes.get (i);
buf.append (suffix.getExpressionString ());
}
return buf.toString ();
}
//-------------------------------------
/**
*
* Evaluates by evaluating the prefix, then applying the suffixes
**/
public Object evaluate (Object pContext,
VariableResolver pResolver,
Map functions,
String defaultPrefix,
Logger pLogger)
throws ELException
{
Object ret = mPrefix.evaluate (pContext, pResolver, functions,
defaultPrefix, pLogger);
// Apply the suffixes
for (int i = 0; mSuffixes != null && i < mSuffixes.size (); i++) {
ValueSuffix suffix = (ValueSuffix) mSuffixes.get (i);
ret = suffix.evaluate (ret, pContext, pResolver, functions,
defaultPrefix, pLogger);
}
return ret;
}
//-------------------------------------
}