Copyright (c) 2000, 2015 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
    Stephan Herrmann - Contribution for
							Bug 429813 - [1.8][dom ast] IMethodBinding#getJavaElement() should return IMethod for lambda
/*******************************************************************************
 * Copyright (c) 2000, 2015 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
 *     Stephan Herrmann - Contribution for
 *								Bug 429813 - [1.8][dom ast] IMethodBinding#getJavaElement() should return IMethod for lambda
 *******************************************************************************/
package org.eclipse.jdt.internal.compiler.ast;

import org.eclipse.jdt.core.compiler.CharOperation;
import org.eclipse.jdt.internal.compiler.ASTVisitor;
import org.eclipse.jdt.internal.compiler.classfmt.ClassFileConstants;
import org.eclipse.jdt.internal.compiler.codegen.*;
import org.eclipse.jdt.internal.compiler.flow.*;
import org.eclipse.jdt.internal.compiler.lookup.*;
import org.eclipse.jdt.internal.compiler.parser.*;

public class Initializer extends FieldDeclaration {

	public Block block;
	public int lastVisibleFieldID;
	public int bodyStart;
	public int bodyEnd;

	private MethodBinding methodBinding;

	public Initializer(Block block, int modifiers) {
		this.block = block;
		this.modifiers = modifiers;

		if (block != null) {
			this.declarationSourceStart = this.sourceStart = block.sourceStart;
		}
	}

	@Override
	public FlowInfo analyseCode(
		MethodScope currentScope,
		FlowContext flowContext,
		FlowInfo flowInfo) {

		if (this.block != null) {
			return this.block.analyseCode(currentScope, flowContext, flowInfo);
		}
		return flowInfo;
	}

	
Code generation for a non-static initializer:
   standard block code gen
Params:
currentScope – org.eclipse.jdt.internal.compiler.lookup.BlockScope
codeStream – org.eclipse.jdt.internal.compiler.codegen.CodeStream/**
	 * Code generation for a non-static initializer:
	 *    standard block code gen
	 *
	 * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
	 * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
	 */
	@Override
	public void generateCode(BlockScope currentScope, CodeStream codeStream) {

		if ((this.bits & IsReachable) == 0) {
			return;
		}
		int pc = codeStream.position;
		if (this.block != null) this.block.generateCode(currentScope, codeStream);
		codeStream.recordPositionsFrom(pc, this.sourceStart);
	}

	
See Also:
getKind.getKind()/**
	 * @see org.eclipse.jdt.internal.compiler.ast.AbstractVariableDeclaration#getKind()
	 */
	@Override
	public int getKind() {
		return INITIALIZER;
	}

	@Override
	public boolean isStatic() {

		return (this.modifiers & ClassFileConstants.AccStatic) != 0;
	}

	public void parseStatements(
		Parser parser,
		TypeDeclaration typeDeclaration,
		CompilationUnitDeclaration unit) {

		//fill up the method body with statement
		parser.parse(this, typeDeclaration, unit);
	}

	@Override
	public StringBuffer printStatement(int indent, StringBuffer output) {

		if (this.modifiers != 0) {
			printIndent(indent, output);
			printModifiers(this.modifiers, output);
			if (this.annotations != null) {
				printAnnotations(this.annotations, output);
				output.append(' ');
			}
			output.append("{\n"); //$NON-NLS-1$
			if (this.block != null) {
				this.block.printBody(indent, output);
			}
			printIndent(indent, output).append('}');
			return output;
		} else if (this.block != null) {
			this.block.printStatement(indent, output);
		} else {
			printIndent(indent, output).append("{}"); //$NON-NLS-1$
		}
		return output;
	}

	@Override
	public void resolve(MethodScope scope) {

		FieldBinding previousField = scope.initializedField;
		int previousFieldID = scope.lastVisibleFieldID;
		try {
			scope.initializedField = null;
			scope.lastVisibleFieldID = this.lastVisibleFieldID;
			if (isStatic()) {
				ReferenceBinding declaringType = scope.enclosingSourceType();
				if (declaringType.isNestedType() && !declaringType.isStatic())
					scope.problemReporter().innerTypesCannotDeclareStaticInitializers(
						declaringType,
						this);
			}
			if (this.block != null) this.block.resolve(scope);
		} finally {
		    scope.initializedField = previousField;
			scope.lastVisibleFieldID = previousFieldID;
		}
	}

	
Method used only by DOM to support bindings of initializers. /** Method used only by DOM to support bindings of initializers. */
	public MethodBinding getMethodBinding() {
		if (this.methodBinding == null) {
			Scope scope = this.block.scope;
			this.methodBinding = isStatic() 
					? new MethodBinding(ClassFileConstants.AccStatic, CharOperation.NO_CHAR, TypeBinding.VOID, Binding.NO_PARAMETERS, Binding.NO_EXCEPTIONS, scope.enclosingSourceType())
					: new MethodBinding(0, CharOperation.NO_CHAR, TypeBinding.VOID, Binding.NO_PARAMETERS, Binding.NO_EXCEPTIONS, scope.enclosingSourceType());
		}
		return this.methodBinding;
	}

	@Override
	public void traverse(ASTVisitor visitor, MethodScope scope) {
		if (visitor.visit(this, scope)) {
			if (this.block != null) this.block.traverse(visitor, scope);
		}
		visitor.endVisit(this, scope);
	}
}