| /******************************************************************************* |
| * Copyright (c) 2006 Oracle Corporation. |
| * 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: |
| * Cameron Bateman/Oracle - initial API and implementation |
| * |
| ********************************************************************************/ |
| |
| package org.eclipse.jst.jsf.common.internal.types; |
| |
| import org.eclipse.jdt.core.Signature; |
| |
| |
| /** |
| * Encapsulates the runtime type or types of a JSF entity in a |
| * way that can be compared to other entities |
| * |
| * @author cbateman |
| * |
| */ |
| public class CompositeType |
| { |
| private final String[] _signatures; |
| private final int _assignmentType; |
| |
| private boolean[] _isTypeSignature; // = null lazily derived from signatures |
| // on first access |
| /** |
| * @param signatureStrings |
| * @param assignmentType |
| */ |
| public CompositeType(String[] signatureStrings, int assignmentType) |
| { |
| if (signatureStrings == null |
| || signatureStrings.length < 1) |
| { |
| throw new AssertionError("Must specify at least one signature string"); //$NON-NLS-1$ |
| } |
| |
| _signatures = new String[signatureStrings.length]; |
| System.arraycopy(signatureStrings, 0, _signatures, 0, _signatures.length); |
| _assignmentType = assignmentType; |
| } |
| |
| /** |
| * Convenience constructor for most common case where composite only |
| * consistes of a single type signature |
| * |
| * @param signatureString |
| * @param assignmentType |
| */ |
| public CompositeType(String signatureString, int assignmentType) |
| { |
| this(new String[]{signatureString}, assignmentType); |
| } |
| /** |
| * @return the assignment type mask |
| */ |
| public int getAssignmentTypeMask() |
| { |
| return _assignmentType; |
| } |
| |
| /** |
| * @return true if the composite type supports being on the LHS of an |
| * assignment |
| */ |
| public boolean isLHS() |
| { |
| return TypeUtil.matchesLHS(_assignmentType); |
| } |
| |
| /** |
| * @return true if the composite type supports being on the RHS of an |
| * assignment |
| */ |
| public boolean isRHS() |
| { |
| return TypeUtil.matchesRHS(_assignmentType); |
| } |
| |
| /** |
| * @return an array of booleans. The value in each index of the array |
| * is true if the corresponding position _signatures corresponds to a type |
| * signature and false if it's a method signature |
| */ |
| public boolean[] getIsTypeSignature() |
| { |
| return getTypeSignatureFlags(); |
| } |
| |
| /** |
| * @return the type signatures. Changes to the returned form do not |
| * affect the internal values |
| */ |
| public String[] getSignatures() |
| { |
| final String[] copy = new String[_signatures.length]; |
| System.arraycopy(_signatures, 0, copy, 0, _signatures.length); |
| return copy; |
| } |
| |
| public String toString() |
| { |
| final StringBuffer stringBuffer = new StringBuffer(); |
| |
| for (int i = 0; i < _signatures.length; i++) |
| { |
| stringBuffer.append(_signatures[i]); |
| stringBuffer.append(" | "); //$NON-NLS-1$ |
| } |
| |
| return stringBuffer.toString(); |
| } |
| |
| /** |
| * @return a version of to string with of the type signatures replaced |
| * with their more Javaeseque names |
| */ |
| public String toUserReadableString() |
| { |
| final StringBuffer stringBuffer = new StringBuffer(); |
| |
| for (int i = 0; i < _signatures.length; i++) |
| { |
| final String signature = _signatures[i]; |
| |
| if (getTypeSignatureFlags()[i]) |
| { |
| stringBuffer.append(Signature.getSignatureSimpleName(signature)); |
| } |
| |
| if (i < _signatures.length -1) |
| { |
| stringBuffer.append(", "); //$NON-NLS-1$ |
| } |
| } |
| return stringBuffer.toString(); |
| } |
| |
| private boolean[] getTypeSignatureFlags() |
| { |
| if (_isTypeSignature == null) |
| { |
| _isTypeSignature = new boolean[_signatures.length]; |
| |
| for (int i = 0; i < _signatures.length; i++) |
| { |
| try |
| { |
| Signature.getTypeSignatureKind(_signatures[i]); |
| |
| // if an exception wasn't thrown above, then it |
| // is some sort of type signature |
| _isTypeSignature[i] = true; |
| } |
| catch (IllegalArgumentException ae) |
| { |
| // getTypeSignatureKind threw an exception, so |
| // this signature is a method |
| _isTypeSignature[i] = false; |
| } |
| } |
| } |
| |
| return _isTypeSignature; |
| } |
| } |