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/*******************************************************************************
* Copyright (c) 2000, 2009 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.core;
/**
* A source range defines an element's source coordinates relative to
* its source buffer.
*
* @see ISourceRange
* @since 3.6
*/
public final class SourceRange implements ISourceRange {
/**
* Helper method that answers whether a valid source range is available
* in the given ISourceRange. When an element has no associated source
* code, Java Model APIs may return either <code>null</code> or a range of
* [-1, 0] to indicate an invalid range. This utility method can be used
* to detect that case.
*
* @param range a source range, can be <code>null</code>
* @return <code>true</code> iff range is not null and range.getOffset() is not -1
*/
public static boolean isAvailable(ISourceRange range) { // see https://bugs.eclipse.org/bugs/show_bug.cgi?id=130161
return range != null && range.getOffset() != -1;
}
private int offset;
private int length;
/**
* Instantiate a new source range using the given offset and the given length.
*
* @param offset the given offset
* @param length the given length
*/
public SourceRange(int offset, int length) {
this.offset = offset;
this.length = length;
}
@Override
public boolean equals(Object obj) {
if (!(obj instanceof ISourceRange))
return false;
ISourceRange sourceRange = (ISourceRange) obj;
return sourceRange.getOffset() == this.offset && sourceRange.getLength() == this.length;
}
/**
* @see ISourceRange
*/
@Override
public int getLength() {
return this.length;
}
/**
* @see ISourceRange
*/
@Override
public int getOffset() {
return this.offset;
}
@Override
public int hashCode() {
return this.length ^ this.offset;
}
@Override
public String toString() {
StringBuffer buffer = new StringBuffer();
buffer.append("[offset="); //$NON-NLS-1$
buffer.append(this.offset);
buffer.append(", length="); //$NON-NLS-1$
buffer.append(this.length);
buffer.append("]"); //$NON-NLS-1$
return buffer.toString();
}
}
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