com.sun.faces.facelets.tag.jstl.core.IteratedValueExpression Maven / Gradle / Ivy
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package com.sun.faces.facelets.tag.jstl.core;
import java.util.Collection;
import java.util.Iterator;
import javax.el.ELContext;
import javax.el.ELException;
import javax.el.PropertyNotWritableException;
import javax.el.ValueExpression;
public final class IteratedValueExpression extends ValueExpression {
private static final long serialVersionUID = 1L;
private ValueExpression orig;
private int start;
private int index;
public IteratedValueExpression(ValueExpression orig, int start, int index) {
this.orig = orig;
this.start = start;
this.index = index;
}
/*
* (non-Javadoc)
*
* @see javax.el.ValueExpression#getValue(javax.el.ELContext)
*/
public Object getValue(ELContext context) {
Collection collection = (Collection) orig.getValue(context);
Iterator iterator = collection.iterator();
Object result = null;
int i = start;
if (i != 0) {
while(i != 0) {
result = iterator.next();
if (!iterator.hasNext()) {
throw new ELException("Unable to position start");
}
i--;
}
} else {
result = iterator.next();
}
while(i < index) {
if (!iterator.hasNext()) {
throw new ELException("Unable to get given value");
}
i++;
result = iterator.next();
}
return result;
}
/*
* (non-Javadoc)
*
* @see javax.el.ValueExpression#setValue(javax.el.ELContext,
* java.lang.Object)
*/
public void setValue(ELContext context, Object value) {
context.setPropertyResolved(false);
throw new PropertyNotWritableException();
}
/*
* (non-Javadoc)
*
* @see javax.el.ValueExpression#isReadOnly(javax.el.ELContext)
*/
public boolean isReadOnly(ELContext context) {
context.setPropertyResolved(false);
return true;
}
/*
* (non-Javadoc)
*
* @see javax.el.ValueExpression#getType(javax.el.ELContext)
*/
public Class getType(ELContext context) {
context.setPropertyResolved(false);
return Object.class;
}
/*
* (non-Javadoc)
*
* @see javax.el.ValueExpression#getExpectedType()
*/
public Class getExpectedType() {
return Object.class;
}
/*
* (non-Javadoc)
*
* @see javax.el.Expression#getExpressionString()
*/
public String getExpressionString() {
return this.orig.getExpressionString();
}
/*
* (non-Javadoc)
*
* @see javax.el.Expression#equals(java.lang.Object)
*/
public boolean equals(Object obj) {
return this.orig.equals(obj);
}
/*
* (non-Javadoc)
*
* @see javax.el.Expression#hashCode()
*/
public int hashCode() {
return this.orig.hashCode();
}
/*
* (non-Javadoc)
*
* @see javax.el.Expression#isLiteralText()
*/
public boolean isLiteralText() {
return false;
}
}