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package com.sun.faces.facelets.compiler;
import com.sun.faces.facelets.el.ELText;
import com.sun.faces.facelets.impl.IdMapper;
import com.sun.faces.facelets.tag.jsf.ComponentSupport;
import com.sun.faces.facelets.util.FastWriter;
import javax.el.ELException;
import javax.faces.component.UIComponent;
import javax.faces.component.UniqueIdVendor;
import javax.faces.context.FacesContext;
import javax.faces.view.facelets.FaceletContext;
import java.io.IOException;
import java.io.Writer;
/**
* @author Adam Winer
* @version $Id: UIInstructionHandler.java 8641 2010-10-04 20:54:50Z edburns $
*/
final class UIInstructionHandler extends AbstractUIHandler {
private final String alias;
private final String id;
private final ELText txt;
private final Instruction[] instructions;
private final int length;
private final boolean literal;
public UIInstructionHandler(String alias, String id, Instruction[] instructions, ELText txt) {
this.alias = alias;
this.id = id;
this.instructions = instructions;
this.txt = txt;
this.length = txt.toString().length();
boolean literal = true;
int size = instructions.length;
for (int i = 0; i < size; i++) {
Instruction ins = this.instructions[i];
if (!ins.isLiteral()) {
literal = false;
break;
}
}
this.literal = literal;
}
public void apply(FaceletContext ctx, UIComponent parent)
throws IOException {
if (parent != null) {
// our id
String id = ctx.generateUniqueId(this.id);
// grab our component
UIComponent c = ComponentSupport.findChildByTagId(parent, id);
boolean componentFound = false;
boolean suppressEvents = false;
if (c != null) {
componentFound = true;
suppressEvents = ComponentSupport.suppressViewModificationEvents(ctx.getFacesContext());
// mark all children for cleaning
ComponentSupport.markForDeletion(c);
} else {
Instruction[] applied;
if (this.literal) {
applied = this.instructions;
} else {
int size = this.instructions.length;
applied = new Instruction[size];
// Create a new list with all of the necessary applied
// instructions
Instruction ins;
for (int i = 0; i < size; i++) {
ins = this.instructions[i];
applied[i] = ins.apply(ctx.getExpressionFactory(), ctx);
}
}
c = new UIInstructions(txt, applied);
// mark it owned by a facelet instance
String uid;
IdMapper mapper = IdMapper.getMapper(ctx.getFacesContext());
String mid = ((mapper != null) ? mapper.getAliasedId(id) : id);
UIComponent ancestorNamingContainer = parent.getNamingContainer();
if (null != ancestorNamingContainer &&
ancestorNamingContainer instanceof UniqueIdVendor) {
uid = ((UniqueIdVendor) ancestorNamingContainer).createUniqueId(ctx.getFacesContext(), mid);
} else {
uid = ComponentSupport.getViewRoot(ctx, parent).createUniqueId(ctx.getFacesContext(), mid);
}
c.setId(uid);
c.getAttributes().put(ComponentSupport.MARK_CREATED, id);
}
// finish cleaning up orphaned children
FacesContext context = ctx.getFacesContext();
if (componentFound) {
ComponentSupport.finalizeForDeletion(c);
if (suppressEvents) {
context.setProcessingEvents(false);
}
parent.getChildren().remove(c);
if (suppressEvents) {
context.setProcessingEvents(true);
}
}
// add the component
if (componentFound && suppressEvents) {
context.setProcessingEvents(false);
}
this.addComponent(ctx, parent, c);
if (componentFound && suppressEvents) {
context.setProcessingEvents(true);
}
}
}
public String toString() {
return this.txt.toString();
}
public String getText() {
return this.txt.toString();
}
public String getText(FaceletContext ctx) {
Writer writer = new FastWriter(this.length);
try {
this.txt.apply(ctx.getExpressionFactory(), ctx).write(writer, ctx);
} catch (IOException e) {
throw new ELException(this.alias + ": "+ e.getMessage(), e.getCause());
}
return writer.toString();
}
}
