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package com.sun.faces.context;
import javax.faces.component.UIComponent;
import javax.faces.component.UIViewRoot;
import javax.faces.component.visit.VisitCallback;
import javax.faces.component.visit.VisitContext;
import javax.faces.component.visit.VisitHint;
import javax.faces.component.visit.VisitResult;
import javax.faces.context.ExternalContext;
import javax.faces.context.FacesContext;
import javax.faces.context.PartialResponseWriter;
import javax.faces.context.PartialViewContext;
import javax.faces.context.ResponseWriter;
import javax.faces.event.PhaseId;
import java.io.Writer;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.EnumSet;
import java.util.List;
import java.util.Map;
import java.util.Arrays;
import java.util.logging.Level;
import java.util.logging.Logger;
import com.sun.faces.component.visit.PartialVisitContext;
import com.sun.faces.util.FacesLogger;
import com.sun.faces.util.Util;
public class PartialViewContextImpl extends PartialViewContext {
// Log instance for this class
private static Logger LOGGER = FacesLogger.CONTEXT.getLogger();
private boolean released;
// BE SURE TO ADD NEW IVARS TO THE RELEASE METHOD
private PartialResponseWriter partialResponseWriter;
private List executeIds;
private Collection renderIds;
private Boolean ajaxRequest;
private Boolean partialRequest;
private Boolean renderAll;
private FacesContext ctx;
private boolean processingPhases = false;
private static final String ORIGINAL_WRITER = "com.sun.faces.ORIGINAL_WRITER";
// ----------------------------------------------------------- Constructors
public PartialViewContextImpl(FacesContext ctx) {
this.ctx = ctx;
}
// ---------------------------------------------- Methods from PartialViewContext
/**
* @see javax.faces.context.PartialViewContext#isAjaxRequest()
*/
@Override
public boolean isAjaxRequest() {
assertNotReleased();
updateFacesContext();
if (ajaxRequest == null) {
ajaxRequest = "partial/ajax".equals(ctx.
getExternalContext().getRequestHeaderMap().get("Faces-Request"));
}
return ajaxRequest;
}
/**
* @see javax.faces.context.PartialViewContext#isPartialRequest()
*/
@Override
public boolean isPartialRequest() {
assertNotReleased();
if (partialRequest == null) {
partialRequest = isAjaxRequest() ||
"partial/process".equals(ctx.
getExternalContext().getRequestHeaderMap().get("Faces-Request"));
}
return partialRequest;
}
/**
* @see javax.faces.context.PartialViewContext#isExecuteAll()
*/
@Override
public boolean isExecuteAll() {
assertNotReleased();
String execute = ctx.
getExternalContext().getRequestParameterMap()
.get(PARTIAL_EXECUTE_PARAM_NAME);
return (ALL_PARTIAL_PHASE_CLIENT_IDS.equals(execute));
}
/**
* @see javax.faces.context.PartialViewContext#isRenderAll()
*/
@Override
public boolean isRenderAll() {
assertNotReleased();
updateFacesContext();
if (renderAll == null) {
String render = ctx.
getExternalContext().getRequestParameterMap()
.get(PARTIAL_RENDER_PARAM_NAME);
renderAll = (ALL_PARTIAL_PHASE_CLIENT_IDS.equals(render));
}
return renderAll;
}
/**
* @see javax.faces.context.PartialViewContext#setRenderAll(boolean)
*/
@Override
public void setRenderAll(boolean renderAll) {
this.renderAll = renderAll;
}
@Override
public void setPartialRequest(boolean isPartialRequest) {
this.partialRequest = isPartialRequest;
}
/**
* @see javax.faces.context.PartialViewContext#getExecuteIds()
*/
@Override
public Collection getExecuteIds() {
assertNotReleased();
if (executeIds != null) {
return executeIds;
}
executeIds = populatePhaseClientIds(PARTIAL_EXECUTE_PARAM_NAME);
// include the view parameter facet ID if there are other execute IDs
// to process
if (!executeIds.isEmpty()) {
UIViewRoot root = ctx.getViewRoot();
if (root.getFacetCount() > 0) {
if (root.getFacet(UIViewRoot.METADATA_FACET_NAME) != null) {
executeIds.add(0, UIViewRoot.METADATA_FACET_NAME);
}
}
}
return executeIds;
}
/**
* @see javax.faces.context.PartialViewContext#getRenderIds()
*/
@Override
public Collection getRenderIds() {
assertNotReleased();
if (renderIds != null) {
return renderIds;
}
renderIds = populatePhaseClientIds(PARTIAL_RENDER_PARAM_NAME);
return renderIds;
}
/**
* @see javax.faces.context.PartialViewContext#processPartial(javax.faces.event.PhaseId))
*/
@Override
public void processPartial(PhaseId phaseId) {
updateFacesContext();
PartialViewContext pvc = ctx.getPartialViewContext();
Collection executeIds = pvc.getExecuteIds();
Collection renderIds = pvc.getRenderIds();
UIViewRoot viewRoot = ctx.getViewRoot();
if (phaseId == PhaseId.APPLY_REQUEST_VALUES ||
phaseId == PhaseId.PROCESS_VALIDATIONS ||
phaseId == PhaseId.UPDATE_MODEL_VALUES) {
// Skip this processing if "none" is specified in the render list,
// or there were no execute phase client ids.
if (executeIds == null || executeIds.isEmpty()) {
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
"No execute and render identifiers specified. Skipping component processing.");
}
return;
}
try {
processComponents(viewRoot, phaseId, executeIds, ctx);
} catch (Exception e) {
if (LOGGER.isLoggable(Level.INFO)) {
LOGGER.log(Level.INFO,
e.toString(),
e);
}
}
// If we have just finished APPLY_REQUEST_VALUES phase, install the
// partial response writer. We want to make sure that any content
// or errors generated in the other phases are written using the
// partial response writer.
//
if (phaseId == PhaseId.APPLY_REQUEST_VALUES) {
PartialResponseWriter writer = pvc.getPartialResponseWriter();
ctx.setResponseWriter(writer);
}
} else if (phaseId == PhaseId.RENDER_RESPONSE) {
try {
//
// We re-enable response writing.
//
PartialResponseWriter writer = pvc.getPartialResponseWriter();
ResponseWriter orig = ctx.getResponseWriter();
ctx.getAttributes().put(ORIGINAL_WRITER, orig);
ctx.setResponseWriter(writer);
ExternalContext exContext = ctx.getExternalContext();
exContext.setResponseContentType("text/xml");
exContext.addResponseHeader("Cache-Control", "no-cache");
writer.startDocument();
if (isRenderAll()) {
renderAll(ctx, viewRoot);
renderState(ctx);
writer.endDocument();
return;
}
// Skip this processing if "none" is specified in the render list,
// or there were no render phase client ids.
if (renderIds == null || renderIds.isEmpty()) {
} else {
processComponents(viewRoot, phaseId, renderIds, ctx);
}
renderState(ctx);
writer.endDocument();
} catch (IOException ex) {
this.cleanupAfterView();
} catch (RuntimeException ex) {
this.cleanupAfterView();
// Throw the exception
throw ex;
}
}
}
/**
* @see javax.faces.context.PartialViewContext#getPartialResponseWriter()
*/
@Override
public PartialResponseWriter getPartialResponseWriter() {
assertNotReleased();
if (partialResponseWriter == null) {
partialResponseWriter = new DelayedInitPartialResponseWriter(this);
}
return partialResponseWriter;
}
/**
* @see javax.faces.context.PartialViewContext#release()
*/
public void release() {
released = true;
ajaxRequest = null;
renderAll = null;
partialResponseWriter = null;
executeIds = null;
renderIds = null;
ctx = null;
partialRequest = null;
}
// -------------------------------------------------------- Private Methods
private List populatePhaseClientIds(String parameterName) {
Map requestParamMap =
ctx.getExternalContext().getRequestParameterMap();
String param = requestParamMap.get(parameterName);
if (param == null) {
return new ArrayList();
} else {
String[] pcs = Util.split(param, "[ \t]+");
return ((pcs != null && pcs.length != 0)
? new ArrayList(Arrays.asList(pcs))
: new ArrayList());
}
}
// Process the components specified in the phaseClientIds list
private void processComponents(UIComponent component, PhaseId phaseId,
Collection phaseClientIds, FacesContext context) throws IOException {
// We use the tree visitor mechanism to locate the components to
// process. Create our (partial) VisitContext and the
// VisitCallback that will be invoked for each component that
// is visited. Note that we use the SKIP_UNRENDERED hint as we
// only want to visit the rendered subtree.
EnumSet hints = EnumSet.of(VisitHint.SKIP_UNRENDERED, VisitHint.EXECUTE_LIFECYCLE);
PartialVisitContext visitContext =
new PartialVisitContext(context, phaseClientIds, hints);
PhaseAwareVisitCallback visitCallback =
new PhaseAwareVisitCallback(ctx, phaseId);
component.visitTree(visitContext, visitCallback);
if (LOGGER.isLoggable(Level.FINER) && !visitContext.getUnvisitedClientIds().isEmpty()) {
Collection unvisitedClientIds = visitContext.getUnvisitedClientIds();
String message;
StringBuilder builder = new StringBuilder();
for (String cur : unvisitedClientIds) {
builder.append(cur).append(" ");
}
LOGGER.log(Level.FINER,
"jsf.context.partial_visit_context_unvisited_children",
new Object[]{builder.toString()});
}
}
private void renderAll(FacesContext context, UIViewRoot viewRoot) throws IOException {
// If this is a "render all via ajax" request,
// make sure to wrap the entire page in a elemnt
// with the special id of VIEW_ROOT_ID. This is how the client
// JavaScript knows how to replace the entire document with
// this response.
PartialViewContext pvc = context.getPartialViewContext();
PartialResponseWriter writer = pvc.getPartialResponseWriter();
writer.startUpdate(PartialResponseWriter.RENDER_ALL_MARKER);
if (viewRoot.getChildCount() > 0) {
for (UIComponent uiComponent : viewRoot.getChildren()) {
uiComponent.encodeAll(context);
}
}
writer.endUpdate();
}
private void renderState(FacesContext context) throws IOException {
if (!context.getViewRoot().isTransient()) {
// Get the view state and write it to the response..
PartialViewContext pvc = context.getPartialViewContext();
PartialResponseWriter writer = pvc.getPartialResponseWriter();
writer.startUpdate(PartialResponseWriter.VIEW_STATE_MARKER);
String state = context.getApplication().getStateManager().getViewState(context);
writer.write(state);
writer.endUpdate();
}
}
private PartialResponseWriter createPartialResponseWriter() {
ExternalContext extContext = ctx.getExternalContext();
String encoding = extContext.getRequestCharacterEncoding();
extContext.setResponseCharacterEncoding(encoding);
ResponseWriter responseWriter = null;
Writer out = null;
try {
out = extContext.getResponseOutputWriter();
} catch (IOException ioe) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.log(Level.SEVERE,
ioe.toString(),
ioe);
}
}
if (out != null) {
responseWriter =
ctx.getRenderKit().createResponseWriter(out,
"text/xml", encoding);
}
if (responseWriter instanceof PartialResponseWriter) {
return (PartialResponseWriter) responseWriter;
} else {
return new PartialResponseWriter(responseWriter);
}
}
private void cleanupAfterView() {
ResponseWriter orig = (ResponseWriter) ctx.getAttributes().
get(ORIGINAL_WRITER);
assert(null != orig);
// move aside the PartialResponseWriter
ctx.setResponseWriter(orig);
}
@SuppressWarnings({"FinalPrivateMethod"})
private final void assertNotReleased() {
if (released) {
throw new IllegalStateException();
}
}
/**
* While setting up PartialViewContextImpl the RI's FacesContextImpl is passed in, but while
* processing phases also FacesContextWrapper must be supported. Therefore ctx is updated
* until processing phases has started. Released FacesContext is updated too.
*/
private void updateFacesContext() {
if (!processingPhases || ctx.isReleased()) {
ctx = FacesContext.getCurrentInstance();
processingPhases = ctx.getCurrentPhaseId() != null;
}
}
// ----------------------------------------------------------- Inner Classes
private static class PhaseAwareVisitCallback implements VisitCallback {
private PhaseId curPhase;
private FacesContext ctx;
private PhaseAwareVisitCallback(FacesContext ctx, PhaseId curPhase) {
this.ctx = ctx;
this.curPhase = curPhase;
}
public VisitResult visit(VisitContext context, UIComponent comp) {
try {
if (curPhase == PhaseId.APPLY_REQUEST_VALUES) {
// RELEASE_PENDING handle immediate request(s)
// If the user requested an immediate request
// Make sure to set the immediate flag here.
comp.processDecodes(ctx);
} else if (curPhase == PhaseId.PROCESS_VALIDATIONS) {
comp.processValidators(ctx);
} else if (curPhase == PhaseId.UPDATE_MODEL_VALUES) {
comp.processUpdates(ctx);
} else if (curPhase == PhaseId.RENDER_RESPONSE) {
PartialResponseWriter writer = ctx.getPartialViewContext().getPartialResponseWriter();
writer.startUpdate(comp.getClientId(ctx));
try {
// do the default behavior...
comp.encodeAll(ctx);
}
catch (Exception ce) {
if (LOGGER.isLoggable(Level.SEVERE)) {
LOGGER.severe(ce.toString());
}
if (LOGGER.isLoggable(Level.FINE)) {
LOGGER.log(Level.FINE,
ce.toString(),
ce);
}
}
writer.endUpdate();
}
else {
throw new IllegalStateException("I18N: Unexpected " +
"PhaseId passed to " +
" PhaseAwareContextCallback: " +
curPhase.toString());
}
}
catch (IOException ex) {
ex.printStackTrace();
}
// Once we visit a component, there is no need to visit
// its children, since processDecodes/Validators/Updates and
// encodeAll() already traverse the subtree. We return
// VisitResult.REJECT to supress the subtree visit.
return VisitResult.REJECT;
}
}
/**
* Delays the actual construction of the PartialResponseWriter until
* content is going to actually be written.
*/
private static final class DelayedInitPartialResponseWriter extends PartialResponseWriter {
private ResponseWriter writer;
private PartialViewContextImpl ctx;
// -------------------------------------------------------- Constructors
public DelayedInitPartialResponseWriter(PartialViewContextImpl ctx) {
super(null);
this.ctx = ctx;
ExternalContext extCtx = ctx.ctx.getExternalContext();
extCtx.setResponseContentType("text/xml");
extCtx.setResponseCharacterEncoding(extCtx.getRequestCharacterEncoding());
}
// ---------------------------------- Methods from PartialResponseWriter
@Override
public ResponseWriter getWrapped() {
if (writer == null) {
writer = ctx.createPartialResponseWriter();
}
return writer;
}
} // END DelayedInitPartialResponseWriter
}
