org.eclipse.jdt.internal.core.search.matching.PackageReferencePattern Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2000, 2010 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jdt.internal.core.search.matching;
import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.core.search.SearchPattern;
public class PackageReferencePattern extends IntersectingPattern {
protected char[] pkgName;
protected char[][] segments;
protected int currentSegment;
protected static char[][] CATEGORIES = { REF };
public PackageReferencePattern(char[] pkgName, int matchRule) {
this(matchRule);
if (pkgName == null || pkgName.length == 0) {
this.pkgName = null;
this.segments = new char[][] {CharOperation.NO_CHAR};
this.mustResolve = false;
} else {
this.pkgName = (this.isCaseSensitive || this.isCamelCase) ? pkgName : CharOperation.toLowerCase(pkgName);
this.segments = CharOperation.splitOn('.', this.pkgName);
this.mustResolve = true;
}
}
PackageReferencePattern(int matchRule) {
super(PKG_REF_PATTERN, matchRule);
}
@Override
public void decodeIndexKey(char[] key) {
// Package reference keys are encoded as 'name' (where 'name' is the last segment of the package name)
this.pkgName = key;
}
@Override
public SearchPattern getBlankPattern() {
return new PackageReferencePattern(R_EXACT_MATCH | R_CASE_SENSITIVE);
}
@Override
public char[] getIndexKey() {
// Package reference keys are encoded as 'name' (where 'name' is the last segment of the package name)
if (this.currentSegment >= 0)
return this.segments[this.currentSegment];
return null;
}
@Override
public char[][] getIndexCategories() {
return CATEGORIES;
}
@Override
protected boolean hasNextQuery() {
// if package has at least 4 segments, don't look at the first 2 since they are mostly
// redundant (e.g. in 'org.eclipse.jdt.core.*' 'org.eclipse' is used all the time)
return --this.currentSegment >= (this.segments.length >= 4 ? 2 : 0);
}
@Override
public boolean matchesDecodedKey(SearchPattern decodedPattern) {
return true; // index key is not encoded so query results all match
}
@Override
protected void resetQuery() {
/* walk the segments from end to start as it will find less potential references using 'lang' than 'java' */
this.currentSegment = this.segments.length - 1;
}
@Override
protected StringBuilder print(StringBuilder output) {
output.append("PackageReferencePattern: <"); //$NON-NLS-1$
if (this.pkgName != null)
output.append(this.pkgName);
else
output.append("*"); //$NON-NLS-1$
output.append(">"); //$NON-NLS-1$
return super.print(output);
}
}