Copyright (c) 2000, 2019 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
    Microsoft Corporation - copied to jdt.core.manipulation
/*******************************************************************************
 * Copyright (c) 2000, 2019 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
 *     Microsoft Corporation - copied to jdt.core.manipulation
 *******************************************************************************/
package org.eclipse.jdt.internal.corext.dom.fragments;

import org.eclipse.core.runtime.Assert;

import org.eclipse.text.edits.TextEditGroup;

import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Name;
import org.eclipse.jdt.core.dom.ParenthesizedExpression;
import org.eclipse.jdt.core.dom.rewrite.ASTRewrite;

import org.eclipse.jdt.internal.corext.dom.JdtASTMatcher;

class SimpleFragment extends ASTFragment {
	private final ASTNode fNode;

	SimpleFragment(ASTNode node) {
		Assert.isNotNull(node);
		fNode= node;
	}

	@Override
	public IASTFragment[] getMatchingFragmentsWithNode(ASTNode node) {
		if (! JdtASTMatcher.doNodesMatch(getAssociatedNode(), node))
			return new IASTFragment[0];

		IASTFragment match= ASTFragmentFactory.createFragmentForFullSubtree(node);
		Assert.isTrue(match.matches(this) || this.matches(match));
		return new IASTFragment[] { match };
	}

	@Override
	public boolean matches(IASTFragment other) {
		return other.getClass().equals(getClass()) && JdtASTMatcher.doNodesMatch(other.getAssociatedNode(), getAssociatedNode());
	}

	@Override
	public IASTFragment[] getSubFragmentsMatching(IASTFragment toMatch) {
		return ASTMatchingFragmentFinder.findMatchingFragments(getAssociatedNode(), (ASTFragment) toMatch);
	}

	@Override
	public int getStartPosition() {
		return fNode.getStartPosition();
	}

	@Override
	public int getLength() {
		return fNode.getLength();
	}

	@Override
	public ASTNode getAssociatedNode() {
		return fNode;
	}

	@Override
	public void replace(ASTRewrite rewrite, ASTNode replacement, TextEditGroup textEditGroup) {
		if (replacement instanceof Name && fNode.getParent() instanceof ParenthesizedExpression) {
			// replace including the parenthesized expression around it
			rewrite.replace(fNode.getParent(), replacement, textEditGroup);
		} else {
			rewrite.replace(fNode, replacement, textEditGroup);
		}
	}

	@Override
	public int hashCode() {
		return fNode.hashCode();
	}

	@Override
	public boolean equals(Object obj) {
		if (this == obj)
			return true;
		if (obj == null)
			return false;
		if (getClass() != obj.getClass())
			return false;
		SimpleFragment other= (SimpleFragment) obj;
		return fNode.equals(other.fNode);
	}

}