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
/*******************************************************************************
 * 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.internal.compiler.ast;

import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.lookup.BlockScope;

Flatten string literal
/**
 * Flatten string literal
 */
public class StringLiteralConcatenation extends StringLiteral {
	private static final int INITIAL_SIZE = 5;
	public Expression[] literals;
	public int counter;
	
Build a two-strings literal
/**
	 * Build a two-strings literal
	 * */
	public StringLiteralConcatenation(StringLiteral str1, StringLiteral str2) {
		super(str1.sourceStart, str1.sourceEnd);
		this.source = str1.source;
		this.literals = new StringLiteral[INITIAL_SIZE];
		this.counter = 0;
		this.literals[this.counter++] = str1;
		extendsWith(str2);
	}

	
 Add the lit source to mine, just as if it was mine
/**
	 *  Add the lit source to mine, just as if it was mine
	 */
	@Override
	public StringLiteralConcatenation extendsWith(StringLiteral lit) {
		this.sourceEnd = lit.sourceEnd;
		final int literalsLength = this.literals.length;
		if (this.counter == literalsLength) {
			// resize
			System.arraycopy(this.literals, 0, this.literals = new StringLiteral[literalsLength + INITIAL_SIZE], 0, literalsLength);
		}
		//uddate the source
		int length = this.source.length;
		System.arraycopy(
			this.source,
			0,
			this.source = new char[length + lit.source.length],
			0,
			length);
		System.arraycopy(lit.source, 0, this.source, length, lit.source.length);
		this.literals[this.counter++] = lit;
		return this;
	}

	@Override
	public StringBuffer printExpression(int indent, StringBuffer output) {
		output.append("StringLiteralConcatenation{"); //$NON-NLS-1$
		for (int i = 0, max = this.counter; i < max; i++) {
			this.literals[i].printExpression(indent, output);
			output.append("+\n");//$NON-NLS-1$
		}
		return output.append('}');
	}

	@Override
	public char[] source() {
		return this.source;
	}

	@Override
	public void traverse(ASTVisitor visitor, BlockScope scope) {
		if (visitor.visit(this, scope)) {
			for (int i = 0, max = this.counter; i < max; i++) {
				this.literals[i].traverse(visitor, scope);
			}
		}
		visitor.endVisit(this, scope);
	}
}