org.eclipse.jdt.internal.core.search.NameMatchRequestorWrapper Maven / Gradle / Ivy

/*******************************************************************************
 * 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
 *     Stephan Herrmann - Contribution for bug 215139
 *******************************************************************************/
package org.eclipse.jdt.internal.core.search;

import org.eclipse.core.runtime.Path;
import org.eclipse.jdt.core.IClassFile;
import org.eclipse.jdt.core.ICompilationUnit;
import org.eclipse.jdt.core.IJavaElement;
import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.core.search.IJavaSearchScope;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.env.AccessRestriction;
import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
import org.eclipse.jdt.internal.core.Openable;
import org.eclipse.jdt.internal.core.PackageFragmentRoot;
import org.eclipse.jdt.internal.core.util.HandleFactory;
import org.eclipse.jdt.internal.core.util.HashtableOfArrayToObject;

/**
 * Parent class for Type and Method NameMatchRequestor classes
 */
public abstract class NameMatchRequestorWrapper {
	protected IJavaSearchScope scope; // scope is needed to retrieve project path for external resource
	private HandleFactory handleFactory; // in case of IJavaSearchScope defined by clients, use an HandleFactory instead

	/**
	 * Cache package fragment root information to optimize speed performance.
	 */
	private String lastPkgFragmentRootPath;
	private IPackageFragmentRoot lastPkgFragmentRoot;

	/**
	 * Cache package handles to optimize memory.
	 */
	private HashtableOfArrayToObject packageHandles;
	private Object lastProject;
	private long complianceValue;

public NameMatchRequestorWrapper(IJavaSearchScope scope) {
	this.scope = scope;
	if (!(scope instanceof AbstractJavaSearchScope)) {
		this.handleFactory = new HandleFactory();
	}
}

/* (non-Javadoc)
 * @see org.eclipse.jdt.internal.core.search.IRestrictedAccessTypeRequestor#acceptType(int, char[], char[], char[][], java.lang.String, org.eclipse.jdt.internal.compiler.env.AccessRestriction)
 */
public IType getType(int modifiers, char[] packageName, char[] simpleTypeName, char[][] enclosingTypeNames, String path, AccessRestriction access) {
	IType type = null;
	try {
		if (this.handleFactory != null) {
			Openable openable = this.handleFactory.createOpenable(path, this.scope);
			if (openable == null) return type;
			switch (openable.getElementType()) {
				case IJavaElement.COMPILATION_UNIT:
					ICompilationUnit cu = (ICompilationUnit) openable;
					if (enclosingTypeNames != null && enclosingTypeNames.length > 0) {
						type = cu.getType(new String(enclosingTypeNames[0]));
						for (int j=1, l=enclosingTypeNames.length; j resourcePath.length()
			|| !resourcePath.startsWith(this.lastPkgFragmentRootPath)) {
		String jarPath= resourcePath.substring(0, separatorIndex);
		IPackageFragmentRoot root= ((AbstractJavaSearchScope)this.scope).packageFragmentRoot(resourcePath, separatorIndex, jarPath);
		if (root == null) return null;
		this.lastPkgFragmentRootPath= jarPath;
		this.lastPkgFragmentRoot= root;
		this.packageHandles= new HashtableOfArrayToObject(5);
	}
	// create handle
	String classFilePath= resourcePath.substring(separatorIndex + 1);
	String[] simpleNames = new Path(classFilePath).segments();
	String[] pkgName;
	int length = simpleNames.length-1;
	if (length > 0) {
		pkgName = new String[length];
		System.arraycopy(simpleNames, 0, pkgName, 0, length);
	} else {
		pkgName = CharOperation.NO_STRINGS;
	}
	IPackageFragment pkgFragment= (IPackageFragment) this.packageHandles.get(pkgName);
	if (pkgFragment == null) {
		pkgFragment= ((PackageFragmentRoot) this.lastPkgFragmentRoot).getPackageFragment(pkgName);
		// filter org.apache.commons.lang.enum package for projects above 1.5 
		// see https://bugs.eclipse.org/bugs/show_bug.cgi?id=317264
		if (length == 5 && pkgName[4].equals("enum")) { //$NON-NLS-1$
			IJavaProject proj = (IJavaProject)pkgFragment.getAncestor(IJavaElement.JAVA_PROJECT);
			if (!proj.equals(this.lastProject)) {
				String complianceStr = proj.getOption(CompilerOptions.OPTION_Source, true);
				this.complianceValue = CompilerOptions.versionToJdkLevel(complianceStr);
				this.lastProject = proj;
			}
			if (this.complianceValue >= ClassFileConstants.JDK1_5)
				return null;
		} 
		this.packageHandles.put(pkgName, pkgFragment);
	}
	return pkgFragment.getClassFile(simpleNames[length]).getType();
}
private IType createTypeFromPath(String resourcePath, String simpleTypeName, char[][] enclosingTypeNames) throws JavaModelException {
	// path to a file in a directory
	// Optimization: cache package fragment root handle and package handles
	int rootPathLength = -1;
	if (this.lastPkgFragmentRootPath == null
		|| !(resourcePath.startsWith(this.lastPkgFragmentRootPath)
			&& (rootPathLength = this.lastPkgFragmentRootPath.length()) > 0
			&& resourcePath.charAt(rootPathLength) == '/')) {
		PackageFragmentRoot root = (PackageFragmentRoot) ((AbstractJavaSearchScope)this.scope).packageFragmentRoot(resourcePath, -1/*not a jar*/, null/*no jar path*/);
		if (root == null) return null;
		this.lastPkgFragmentRoot = root;
		this.lastPkgFragmentRootPath = root.internalPath().toString();
		this.packageHandles = new HashtableOfArrayToObject(5);
	}
	// create handle
	resourcePath = resourcePath.substring(this.lastPkgFragmentRootPath.length() + 1);
	String[] simpleNames = new Path(resourcePath).segments();
	String[] pkgName;
	int length = simpleNames.length-1;
	if (length > 0) {
		pkgName = new String[length];
		System.arraycopy(simpleNames, 0, pkgName, 0, length);
	} else {
		pkgName = CharOperation.NO_STRINGS;
	}
	IPackageFragment pkgFragment= (IPackageFragment) this.packageHandles.get(pkgName);
	if (pkgFragment == null) {
		pkgFragment= ((PackageFragmentRoot) this.lastPkgFragmentRoot).getPackageFragment(pkgName);
		this.packageHandles.put(pkgName, pkgFragment);
	}
	String simpleName= simpleNames[length];
	if (org.eclipse.jdt.internal.core.util.Util.isJavaLikeFileName(simpleName)) {
		ICompilationUnit unit= pkgFragment.getCompilationUnit(simpleName);
		int etnLength = enclosingTypeNames == null ? 0 : enclosingTypeNames.length;
		IType type = (etnLength == 0) ? unit.getType(simpleTypeName) : unit.getType(new String(enclosingTypeNames[0]));
		if (etnLength > 0) {
			for (int i=1; i