/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.flex.compiler.internal.codegen.js.jx;
import org.apache.flex.compiler.asdoc.flexjs.ASDocComment;
import org.apache.flex.compiler.codegen.js.IJSEmitter;
import org.apache.flex.compiler.definitions.IClassDefinition;
import org.apache.flex.compiler.definitions.IDefinition;
import org.apache.flex.compiler.internal.codegen.as.ASEmitterTokens;
import org.apache.flex.compiler.internal.codegen.js.JSSubEmitter;
import org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitter;
import org.apache.flex.compiler.internal.codegen.js.flexjs.JSFlexJSEmitterTokens;
import org.apache.flex.compiler.internal.projects.FlexJSProject;
import org.apache.flex.compiler.projects.ICompilerProject;
import org.apache.flex.compiler.tree.ASTNodeID;
import org.apache.flex.compiler.tree.as.IASNode;
import org.apache.flex.compiler.tree.as.IBinaryOperatorNode;
import org.apache.flex.compiler.tree.as.IExpressionNode;
import org.apache.flex.compiler.tree.as.IFunctionNode;
public class AsIsEmitter extends JSSubEmitter
{
public AsIsEmitter(IJSEmitter emitter)
{
super(emitter);
}
public void emitIsAs(IExpressionNode node, IExpressionNode left, IExpressionNode right,
ASTNodeID id, boolean coercion)
{
// project is null in unit tests
//IDefinition dnode = project != null ? (right).resolve(project) : null;
IDefinition dnode = getProject() != null ? (right)
.resolve(getProject()) : null;
if (id != ASTNodeID.Op_IsID && dnode != null)
{
boolean emit = coercion ?
!((FlexJSProject)getProject()).config.getJSOutputOptimizations().contains(JSFlexJSEmitterTokens.SKIP_FUNCTION_COERCIONS.getToken()) :
!((FlexJSProject)getProject()).config.getJSOutputOptimizations().contains(JSFlexJSEmitterTokens.SKIP_AS_COERCIONS.getToken());
// find the function node
IFunctionNode functionNode = (IFunctionNode) left
.getAncestorOfType(IFunctionNode.class);
if (functionNode != null) // can be null in synthesized binding code
{
if (coercion)
{
// see if the cast is inside a try/catch in this function. If so,
// assume that we want an exception.
IASNode child = left.getParent();
while (child != functionNode)
{
if (child.getNodeID() == ASTNodeID.TryID)
{
emit = true;
break;
}
child = child.getParent();
}
}
ASDocComment asDoc = (ASDocComment) functionNode
.getASDocComment();
if (asDoc != null)
{
String asDocString = asDoc.commentNoEnd();
String coercionToken = JSFlexJSEmitterTokens.EMIT_COERCION
.getToken();
int emitIndex = asDocString.indexOf(coercionToken);
while (emitIndex != -1)
{
String emitable = asDocString.substring(emitIndex
+ coercionToken.length());
int endIndex = emitable.indexOf("\n");
emitable = emitable.substring(0, endIndex);
emitable = emitable.trim();
String rightSide = dnode.getQualifiedName();
if (emitable.equals(rightSide))
{
emit = true;
break;
}
emitIndex = asDocString.indexOf(coercionToken,
emitIndex + coercionToken.length());
}
String ignoreToken = JSFlexJSEmitterTokens.IGNORE_COERCION
.getToken();
int ignoreIndex = asDocString.indexOf(ignoreToken);
while (ignoreIndex != -1)
{
String ignorable = asDocString.substring(ignoreIndex
+ ignoreToken.length());
int endIndex = ignorable.indexOf("\n");
ignorable = ignorable.substring(0, endIndex);
ignorable = ignorable.trim();
String rightSide = dnode.getQualifiedName();
if (ignorable.equals(rightSide))
{
emit = false;
break;
}
ignoreIndex = asDocString.indexOf(ignoreToken,
ignoreIndex + ignoreToken.length());
}
}
}
if (!emit)
{
getWalker().walk(left);
return;
}
}
ICompilerProject project = this.getProject();
if (project instanceof FlexJSProject)
((FlexJSProject)project).needLanguage = true;
if (node instanceof IBinaryOperatorNode)
{
IBinaryOperatorNode binaryOperatorNode = (IBinaryOperatorNode) node;
startMapping(node, binaryOperatorNode.getLeftOperandNode());
}
else
{
startMapping(node);
}
write(JSFlexJSEmitterTokens.LANGUAGE_QNAME);
write(ASEmitterTokens.MEMBER_ACCESS);
if (id == ASTNodeID.Op_IsID)
write(ASEmitterTokens.IS);
else
write(ASEmitterTokens.AS);
write(ASEmitterTokens.PAREN_OPEN);
endMapping(node);
getWalker().walk(left);
if (node instanceof IBinaryOperatorNode)
{
IBinaryOperatorNode binaryOperatorNode = (IBinaryOperatorNode) node;
startMapping(node, binaryOperatorNode.getLeftOperandNode());
}
else
{
startMapping(node);
}
writeToken(ASEmitterTokens.COMMA);
endMapping(node);
if (dnode instanceof IClassDefinition)
{
startMapping(right);
write(getEmitter().formatQualifiedName(((JSFlexJSEmitter)getEmitter()).convertASTypeToJS(dnode.getQualifiedName())));
endMapping(right);
}
else
{
getWalker().walk(right);
}
if (node instanceof IBinaryOperatorNode)
{
IBinaryOperatorNode binaryOperatorNode = (IBinaryOperatorNode) node;
startMapping(node, binaryOperatorNode.getLeftOperandNode());
}
else
{
startMapping(node);
}
if (coercion)
{
writeToken(ASEmitterTokens.COMMA);
write(ASEmitterTokens.TRUE);
}
write(ASEmitterTokens.PAREN_CLOSE);
endMapping(node);
}
}