CompletionOnQualifiedAllocationExpression.java

/*******************************************************************************
 * Copyright (c) 2000, 2011 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.jdt.internal.codeassist.complete;

/*
 * Completion node build by the parser in any case it was intending to
 * reduce an allocation expression containing the cursor.
 * If the allocation expression is not qualified, the enclosingInstance field
 * is null.
 * e.g.
 *
 *	class X {
 *    void foo() {
 *      new Bar(1, 2, [cursor]
 *    }
 *  }
 *
 *	---> class X {
 *         void foo() {
 *           <CompleteOnAllocationExpression:new Bar(1, 2)>
 *         }
 *       }
 *
 * The source range is always of length 0.
 * The arguments of the allocation expression are all the arguments defined
 * before the cursor.
 */

import org.eclipse.jdt.internal.compiler.ast.*;
import org.eclipse.jdt.internal.compiler.lookup.*;

public class CompletionOnQualifiedAllocationExpression extends QualifiedAllocationExpression {
public TypeBinding resolveType(BlockScope scope) {
	TypeBinding[] argumentTypes = Binding.NO_PARAMETERS;
	if (this.arguments != null) {
		int argsLength = this.arguments.length;
		int length = this.arguments.length;
		argumentTypes = new TypeBinding[length];
		for (int a = argsLength; --a >= 0;) {
			argumentTypes[a] = this.arguments[a].resolveType(scope);
		}
	}
	final boolean isDiamond = this.type != null && (this.type.bits & ASTNode.IsDiamond) != 0;
	if (this.enclosingInstance != null) {
		TypeBinding enclosingType = this.enclosingInstance.resolveType(scope);
		if (enclosingType == null) {
			// try to propose something even if enclosing type cannot be resolved.
			// Eg.: new Test<>().new Test<>(#cursor#
			if (this.enclosingInstance instanceof AllocationExpression) {
				TypeReference enclosingInstanceType = ((AllocationExpression) this.enclosingInstance).type;
				if (enclosingInstanceType != null) {
					enclosingType = enclosingInstanceType.resolvedType;
				}
			}
		}
		if (enclosingType == null || !(enclosingType instanceof ReferenceBinding)) {
			throw new CompletionNodeFound();
		}
		this.resolvedType = ((SingleTypeReference) this.type).resolveTypeEnclosing(scope, (ReferenceBinding) enclosingType);
		if (isDiamond && (this.resolvedType instanceof ParameterizedTypeBinding)) {
			TypeBinding [] inferredTypes = inferElidedTypes(((ParameterizedTypeBinding) this.resolvedType).genericType(), null, argumentTypes, scope);
			if (inferredTypes != null) {
				this.resolvedType = this.type.resolvedType = scope.environment().createParameterizedType(((ParameterizedTypeBinding) this.resolvedType).genericType(), inferredTypes, ((ParameterizedTypeBinding) this.resolvedType).enclosingType());
			} else {
				// inference failed. Resolved type will be of the form Test<>
				this.bits |= ASTNode.IsDiamond;
			}
	 	}
		if (!(this.resolvedType instanceof ReferenceBinding))
			throw new CompletionNodeFound(); // no need to continue if its an array or base type
		if (this.resolvedType.isInterface()) // handle the anonymous class definition case
			this.resolvedType = scope.getJavaLangObject();
	} else {
	 	this.resolvedType = this.type.resolveType(scope, true /* check bounds*/);
	 	if (isDiamond && (this.resolvedType instanceof ParameterizedTypeBinding)) {
			TypeBinding [] inferredTypes = inferElidedTypes(((ParameterizedTypeBinding) this.resolvedType).genericType(), null, argumentTypes, scope);
			if (inferredTypes != null) {
				this.resolvedType = this.type.resolvedType = scope.environment().createParameterizedType(((ParameterizedTypeBinding) this.resolvedType).genericType(), inferredTypes, ((ParameterizedTypeBinding) this.resolvedType).enclosingType());
			} else {
				// inference failed. Resolved type will be of the form Test<>
				this.bits |= ASTNode.IsDiamond;
			}
	 	}
		if (!(this.resolvedType instanceof ReferenceBinding))
			throw new CompletionNodeFound(); // no need to continue if its an array or base type
	}

	throw new CompletionNodeFound(this, this.resolvedType, scope);
}
public StringBuffer printExpression(int indent, StringBuffer output) {
	if (this.enclosingInstance == null)
		output.append("<CompleteOnAllocationExpression:" );  //$NON-NLS-1$
	else
		output.append("<CompleteOnQualifiedAllocationExpression:");  //$NON-NLS-1$
	return super.printExpression(indent, output).append('>');
}
}