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
/*******************************************************************************
 * 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
 *******************************************************************************/
package org.eclipse.jdt.internal.core.dom.rewrite;

import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.runtime.Assert;
import org.eclipse.jdt.core.JavaCore;
import org.eclipse.jdt.core.ToolFactory;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.Annotation;
import org.eclipse.jdt.core.dom.Block;
import org.eclipse.jdt.core.dom.BodyDeclaration;
import org.eclipse.jdt.core.dom.Expression;
import org.eclipse.jdt.core.dom.Statement;
import org.eclipse.jdt.core.formatter.CodeFormatter;
import org.eclipse.jdt.core.formatter.DefaultCodeFormatterConstants;
import org.eclipse.jdt.core.formatter.IndentManipulation;
import org.eclipse.jface.text.BadLocationException;
import org.eclipse.jface.text.BadPositionCategoryException;
import org.eclipse.jface.text.DefaultPositionUpdater;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.Position;
import org.eclipse.text.edits.DeleteEdit;
import org.eclipse.text.edits.InsertEdit;
import org.eclipse.text.edits.MultiTextEdit;
import org.eclipse.text.edits.ReplaceEdit;
import org.eclipse.text.edits.TextEdit;

@SuppressWarnings({"rawtypes", "unchecked"})
public final class ASTRewriteFormatter {

	public static class NodeMarker extends Position {
		public Object data;
	}

	private class ExtendedFlattener extends ASTRewriteFlattener {

		private ArrayList positions;

		public ExtendedFlattener(RewriteEventStore store) {
			super(store);
			this.positions= new ArrayList();
		}

		@Override
		public void preVisit(ASTNode node) {
			Object trackData= getEventStore().getTrackedNodeData(node);
			if (trackData != null) {
				addMarker(trackData, this.result.length(), 0);
			}
			Object placeholderData= getPlaceholders().getPlaceholderData(node);
			if (placeholderData != null) {
				addMarker(placeholderData, this.result.length(), 0);
			}
		}

		@Override
		public void postVisit(ASTNode node) {
			Object placeholderData= getPlaceholders().getPlaceholderData(node);
			if (placeholderData != null) {
				fixupLength(placeholderData, this.result.length());
			}
			Object trackData= getEventStore().getTrackedNodeData(node);
			if (trackData != null) {
				fixupLength(trackData, this.result.length());
			}
		}

		@Override
		public boolean visit(Block node) {
			if (getPlaceholders().isCollapsed(node)) {
				visitList(node, Block.STATEMENTS_PROPERTY, null);
				return false;
			}
			return super.visit(node);
		}

		private NodeMarker addMarker(Object annotation, int startOffset, int length) {
			NodeMarker marker= new NodeMarker();
			marker.offset= startOffset;
			marker.length= length;
			marker.data= annotation;
			this.positions.add(marker);
			return marker;
		}

		private void fixupLength(Object data, int endOffset) {
			for (int i= this.positions.size()-1; i >= 0 ; i--) {
				NodeMarker marker= (NodeMarker) this.positions.get(i);
				if (marker.data == data) {
					marker.length= endOffset - marker.offset;
					return;
				}
			}
		}

		public NodeMarker[] getMarkers() {
			return (NodeMarker[]) this.positions.toArray(new NodeMarker[this.positions.size()]);
		}
	}

	private final String lineDelimiter;
	private final int tabWidth;
	private final int indentWidth;

	private final NodeInfoStore placeholders;
	private final RewriteEventStore eventStore;

	private final Map options;


	public ASTRewriteFormatter(NodeInfoStore placeholders, RewriteEventStore eventStore, Map options, String lineDelimiter) {
		this.placeholders= placeholders;
		this.eventStore= eventStore;
	
		this.options= options == null ? JavaCore.getOptions() : (Map) new HashMap(options);
		this.options.put(
				DefaultCodeFormatterConstants.FORMATTER_ALIGNMENT_FOR_RESOURCES_IN_TRY,
				DefaultCodeFormatterConstants.createAlignmentValue(true, DefaultCodeFormatterConstants.WRAP_NEXT_PER_LINE, DefaultCodeFormatterConstants.INDENT_DEFAULT));

		this.lineDelimiter= lineDelimiter;
	
		this.tabWidth= IndentManipulation.getTabWidth(options);
		this.indentWidth= IndentManipulation.getIndentWidth(options);
	}



	public NodeInfoStore getPlaceholders() {
		return this.placeholders;
	}

	public RewriteEventStore getEventStore() {
		return this.eventStore;
	}

	public int getTabWidth() {
		return this.tabWidth;
	}

	public int getIndentWidth() {
		return this.indentWidth;
	}

	public String getLineDelimiter() {
		return this.lineDelimiter;
	}

	
Returns the string accumulated in the visit formatted using the default formatter.
Updates the existing node's positions.
Params:
node – The node to flatten.
initialIndentationLevel – The initial indentation level.
resultingMarkers – Resulting the updated NodeMarkers.
Returns:
Returns the serialized and formatted code./**
	 * Returns the string accumulated in the visit formatted using the default formatter.
	 * Updates the existing node's positions.
	 *
	 * @param node The node to flatten.
	 * @param initialIndentationLevel The initial indentation level.
	 * @param resultingMarkers Resulting the updated NodeMarkers.
	 * @return Returns the serialized and formatted code.
	 */
	public String getFormattedResult(ASTNode node, int initialIndentationLevel, Collection resultingMarkers) {

		ExtendedFlattener flattener= new ExtendedFlattener(this.eventStore);
		node.accept(flattener);

		NodeMarker[] markers= flattener.getMarkers();
		Collections.addAll(resultingMarkers, markers);

		String unformatted= flattener.getResult();
		TextEdit edit= formatNode(node, unformatted, initialIndentationLevel);
		if (edit == null) {
		    if (initialIndentationLevel > 0) {
		        // at least correct the indent
		        String indentString = createIndentString(initialIndentationLevel);
				ReplaceEdit[] edits = IndentManipulation.getChangeIndentEdits(unformatted, 0, this.tabWidth, this.indentWidth, indentString);
				edit= new MultiTextEdit();
				edit.addChild(new InsertEdit(0, indentString));
				edit.addChildren(edits);
		    } else {
		       return unformatted;
		    }
		}
		return evaluateFormatterEdit(unformatted, edit, markers);
	}

    public String createIndentString(int indentationUnits) {
    	return ToolFactory.createCodeFormatter(this.options).createIndentationString(indentationUnits);
    }

	public String getIndentString(String currentLine) {
		return IndentManipulation.extractIndentString(currentLine, this.tabWidth, this.indentWidth);
	}

	public String changeIndent(String code, int codeIndentLevel, String newIndent) {
		return IndentManipulation.changeIndent(code, codeIndentLevel, this.tabWidth, this.indentWidth, newIndent, this.lineDelimiter);
	}

	public int computeIndentUnits(String line) {
		return IndentManipulation.measureIndentUnits(line, this.tabWidth, this.indentWidth);
	}

	
Evaluates the edit on the given string.
Params:
string – The string to format
edit – The edit resulted from the code formatter
positions – Positions to update or null.
Throws:
IllegalArgumentException – If the positions are not inside the string, a
 IllegalArgumentException is thrown.
Returns:
The formatted string/**
	 * Evaluates the edit on the given string.
	 * @param string The string to format
	 * @param edit The edit resulted from the code formatter
	 * @param positions Positions to update or <code>null</code>.
	 * @return The formatted string
	 * @throws IllegalArgumentException If the positions are not inside the string, a
	 *  IllegalArgumentException is thrown.
	 */
	public static String evaluateFormatterEdit(String string, TextEdit edit, Position[] positions) {
		try {
			Document doc= createDocument(string, positions);
			edit.apply(doc, 0);
			if (positions != null) {
				for (int i= 0; i < positions.length; i++) {
					Assert.isTrue(!positions[i].isDeleted, "Position got deleted"); //$NON-NLS-1$
				}
			}
			return doc.get();
		} catch (BadLocationException e) {
			//JavaPlugin.log(e); // bug in the formatter
			Assert.isTrue(false, "Fromatter created edits with wrong positions: " + e.getMessage()); //$NON-NLS-1$
		}
		return null;
	}

	public TextEdit formatString(int kind, String string, int offset, int length, int indentationLevel) {
		return ToolFactory.createCodeFormatter(this.options).format(kind, string, offset, length, indentationLevel, this.lineDelimiter);
	}

	
Creates edits that describe how to format the given string. Returns null if the code could not be formatted for the given kind.
Params:
node – Node describing the type of the string
str – The unformatted string
indentationLevel – 
Throws:
IllegalArgumentException – If the offset and length are not inside the string, a
 IllegalArgumentException is thrown.
Returns:
Returns the edit representing the result of the formatter/**
	 * Creates edits that describe how to format the given string. Returns <code>null</code> if the code could not be formatted for the given kind.
	 * @param node Node describing the type of the string
	 * @param str The unformatted string
	 * @param indentationLevel
	 * @return Returns the edit representing the result of the formatter
	 * @throws IllegalArgumentException If the offset and length are not inside the string, a
	 *  IllegalArgumentException is thrown.
	 */
	private TextEdit formatNode(ASTNode node, String str, int indentationLevel) {
		int code;
		String prefix= ""; //$NON-NLS-1$
		String suffix= ""; //$NON-NLS-1$
		if (node instanceof Statement) {
			code= CodeFormatter.K_STATEMENTS;
			if (node.getNodeType() == ASTNode.SWITCH_CASE) {
				prefix= "switch(1) {"; //$NON-NLS-1$
				suffix= "}"; //$NON-NLS-1$
				code= CodeFormatter.K_STATEMENTS;
			}
		} else if (node instanceof Expression && node.getNodeType() != ASTNode.VARIABLE_DECLARATION_EXPRESSION) {
			if (node instanceof Annotation) {
				suffix= "\nclass A {}"; //$NON-NLS-1$
				code= CodeFormatter.K_COMPILATION_UNIT;
			} else {
				code= CodeFormatter.K_EXPRESSION;
			}
		} else if (node instanceof BodyDeclaration) {
			code= CodeFormatter.K_CLASS_BODY_DECLARATIONS;
		} else {
			switch (node.getNodeType()) {
				case ASTNode.ARRAY_TYPE:
				case ASTNode.PARAMETERIZED_TYPE:
				case ASTNode.PRIMITIVE_TYPE:
				case ASTNode.QUALIFIED_TYPE:
				case ASTNode.SIMPLE_TYPE:
					prefix= "void m(final "; //$NON-NLS-1$
					suffix= " x);"; //$NON-NLS-1$
					code= CodeFormatter.K_CLASS_BODY_DECLARATIONS;
					break;
				case ASTNode.WILDCARD_TYPE:
					prefix= "A<"; //$NON-NLS-1$
					suffix= "> x;"; //$NON-NLS-1$
					code= CodeFormatter.K_CLASS_BODY_DECLARATIONS;
					break;
				case ASTNode.COMPILATION_UNIT:
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.MODULE_DECLARATION:
					code= CodeFormatter.K_MODULE_INFO;
					break;
				case ASTNode.VARIABLE_DECLARATION_EXPRESSION:
					suffix= ";"; //$NON-NLS-1$
					code= CodeFormatter.K_STATEMENTS;
					break;
				case ASTNode.SINGLE_VARIABLE_DECLARATION:
					prefix= "void m("; //$NON-NLS-1$
					suffix= ");"; //$NON-NLS-1$
					code= CodeFormatter.K_CLASS_BODY_DECLARATIONS;
					break;
				case ASTNode.VARIABLE_DECLARATION_FRAGMENT:
					prefix= "A "; //$NON-NLS-1$
					suffix= ";"; //$NON-NLS-1$
					code= CodeFormatter.K_STATEMENTS;
					break;
				case ASTNode.PACKAGE_DECLARATION:
				case ASTNode.IMPORT_DECLARATION:
					suffix= "\nclass A {}"; //$NON-NLS-1$
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.JAVADOC:
					suffix= "\nclass A {}"; //$NON-NLS-1$
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.CATCH_CLAUSE:
					prefix= "try {}"; //$NON-NLS-1$
					code= CodeFormatter.K_STATEMENTS;
					break;
				case ASTNode.ANONYMOUS_CLASS_DECLARATION:
					prefix= "new A()"; //$NON-NLS-1$
					suffix= ";"; //$NON-NLS-1$
					code= CodeFormatter.K_STATEMENTS;
					break;
				case ASTNode.MEMBER_VALUE_PAIR:
					prefix= "@Author("; //$NON-NLS-1$
					suffix= ") class x {}"; //$NON-NLS-1$
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.MODIFIER:
					suffix= " class x {}"; //$NON-NLS-1$
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.MODULE_MODIFIER:
					code= CodeFormatter.K_MODULE_INFO;
					break;
				case ASTNode.TYPE_PARAMETER:
					prefix= "class X<"; //$NON-NLS-1$
					suffix= "> {}"; //$NON-NLS-1$
					code= CodeFormatter.K_COMPILATION_UNIT;
					break;
				case ASTNode.MEMBER_REF:
				case ASTNode.METHOD_REF:
				case ASTNode.METHOD_REF_PARAMETER:
				case ASTNode.TAG_ELEMENT:
				case ASTNode.TEXT_ELEMENT:
					// javadoc formatting disabled due to bug 93644
					return null;

//				wiat for bug 93644
//				case ASTNode.MEMBER_REF:
//				case ASTNode.METHOD_REF:
//					prefix= "/**\n * @see ";
//					suffix= "\n*/";
//					code= CodeFormatter.K_JAVA_DOC;
//					break;
//				case ASTNode.METHOD_REF_PARAMETER:
//					prefix= "/**\n * @see A#foo(";
//					suffix= ")\n*/";
//					code= CodeFormatter.K_JAVA_DOC;
//					break;
//				case ASTNode.TAG_ELEMENT:
//				case ASTNode.TEXT_ELEMENT:
//					prefix= "/**\n * ";
//					suffix= "\n*/";
//					code= CodeFormatter.K_JAVA_DOC;
//					break;
				default:
					//Assert.isTrue(false, "Node type not covered: " + node.getClass().getName());
					return null;
			}
		}

		String concatStr= prefix + str + suffix;
		TextEdit edit= formatString(code, concatStr, prefix.length(), str.length(), indentationLevel);

		if (prefix.length() > 0) {
			edit= shifEdit(edit, prefix.length());
		}
		return edit;
	}

	private static TextEdit shifEdit(TextEdit oldEdit, int diff) {
		TextEdit newEdit;
		if (oldEdit instanceof ReplaceEdit) {
			ReplaceEdit edit= (ReplaceEdit) oldEdit;
			newEdit= new ReplaceEdit(edit.getOffset() - diff, edit.getLength(), edit.getText());
		} else if (oldEdit instanceof InsertEdit) {
			InsertEdit edit= (InsertEdit) oldEdit;
			newEdit= new InsertEdit(edit.getOffset() - diff,  edit.getText());
		} else if (oldEdit instanceof DeleteEdit) {
			DeleteEdit edit= (DeleteEdit) oldEdit;
			newEdit= new DeleteEdit(edit.getOffset() - diff,  edit.getLength());
		} else if (oldEdit instanceof MultiTextEdit) {
			newEdit= new MultiTextEdit();
		} else {
			return null; // not supported
		}
		TextEdit[] children= oldEdit.getChildren();
		for (int i= 0; i < children.length; i++) {
			TextEdit shifted= shifEdit(children[i], diff);
			if (shifted != null) {
				newEdit.addChild(shifted);
			}
		}
		return newEdit;
	}

	private static Document createDocument(String string, Position[] positions) throws IllegalArgumentException {
		Document doc= new Document(string);
		try {
			if (positions != null) {
				final String POS_CATEGORY= "myCategory"; //$NON-NLS-1$

				doc.addPositionCategory(POS_CATEGORY);
				doc.addPositionUpdater(new DefaultPositionUpdater(POS_CATEGORY) {
					@Override
					protected boolean notDeleted() {
						int start= this.fOffset;
						int end= start + this.fLength;
						if (start < this.fPosition.offset && (this.fPosition.offset + this.fPosition.length < end)) {
							this.fPosition.offset= end; // deleted positions: set to end of remove
							return false;
						}
						return true;
					}
				});
				for (int i= 0; i < positions.length; i++) {
					try {
						doc.addPosition(POS_CATEGORY, positions[i]);
					} catch (BadLocationException e) {
						throw new IllegalArgumentException("Position outside of string. offset: " + positions[i].offset + ", length: " + positions[i].length + ", string size: " + string.length(), e);   //$NON-NLS-1$//$NON-NLS-2$//$NON-NLS-3$
					}
				}
			}
		} catch (BadPositionCategoryException cannotHappen) {
			// can not happen: category is correctly set up
		}
		return doc;
	}



    public static interface Prefix {
		String getPrefix(int indent);
	}

	public static interface BlockContext {
		String[] getPrefixAndSuffix(int indent, ASTNode node, RewriteEventStore events);
	}

	public static class ConstPrefix implements Prefix {
		private String prefix;

		public ConstPrefix(String prefix) {
			this.prefix= prefix;
		}

		@Override
		public String getPrefix(int indent) {
			return this.prefix;
		}
	}

	private class FormattingPrefix implements Prefix {
		private int kind;
		private String string;
		private int start;
		private int length;

		public FormattingPrefix(String string, String sub, int kind) {
			this.start= string.indexOf(sub);
			this.length= sub.length();
			this.string= string;
			this.kind= kind;
		}

		@Override
		public String getPrefix(int indent) {
			Position pos= new Position(this.start, this.length);
			String str= this.string;
			TextEdit res= formatString(this.kind, str, 0, str.length(), indent);
			if (res != null) {
				str= evaluateFormatterEdit(str, res, new Position[] { pos });
			}
			return str.substring(pos.offset + 1, pos.offset + pos.length - 1);
		}
	}

	private class BlockFormattingPrefix implements BlockContext {
		private String prefix;
		private int start;

		public BlockFormattingPrefix(String prefix, int start) {
			this.start= start;
			this.prefix= prefix;
		}

		@Override
		public String[] getPrefixAndSuffix(int indent, ASTNode node, RewriteEventStore events) {
			String nodeString= ASTRewriteFlattener.asString(node, events);
			String str= this.prefix + nodeString;
			Position pos= new Position(this.start, this.prefix.length() + 1 - this.start);

			TextEdit res= formatString(CodeFormatter.K_STATEMENTS, str, 0, str.length(), indent);
			if (res != null) {
				str= evaluateFormatterEdit(str, res, new Position[] { pos });
			}
			return new String[] { str.substring(pos.offset + 1, pos.offset + pos.length - 1), ""}; //$NON-NLS-1$
		}
	}

	private class BlockFormattingPrefixSuffix implements BlockContext {
		private String prefix;
		private String suffix;
		private int start;

		public BlockFormattingPrefixSuffix(String prefix, String suffix, int start) {
			this.start= start;
			this.suffix= suffix;
			this.prefix= prefix;
		}

		@Override
		public String[] getPrefixAndSuffix(int indent, ASTNode node, RewriteEventStore events) {
			String nodeString= ASTRewriteFlattener.asString(node, events);
			int nodeStart= this.prefix.length();
			int nodeEnd= nodeStart + nodeString.length() - 1;

			String str= this.prefix + nodeString + this.suffix;

			Position pos1= new Position(this.start, nodeStart + 1 - this.start);
			Position pos2= new Position(nodeEnd, 2);

			TextEdit res= formatString(CodeFormatter.K_STATEMENTS, str, 0, str.length(), indent);
			if (res != null) {
				str= evaluateFormatterEdit(str, res, new Position[] { pos1, pos2 });
			}
			return new String[] {
				str.substring(pos1.offset + 1, pos1.offset + pos1.length - 1),
				str.substring(pos2.offset + 1, pos2.offset + pos2.length - 1)
			};
		}
	}

	public final static Prefix NONE= new ConstPrefix(""); //$NON-NLS-1$
	public final static Prefix SPACE= new ConstPrefix(" "); //$NON-NLS-1$
	public final static Prefix ASSERT_COMMENT= new ConstPrefix(" : "); //$NON-NLS-1$

	public final Prefix VAR_INITIALIZER= new FormattingPrefix("A a={};", "a={" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix METHOD_BODY= new FormattingPrefix("void a() {}", ") {" , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix FINALLY_BLOCK= new FormattingPrefix("try {} finally {}", "} finally {", CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix CATCH_BLOCK= new FormattingPrefix("try {} catch(Exception e) {}", "} c" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix ANNOT_MEMBER_DEFAULT= new FormattingPrefix("String value() default 1;", ") default 1" , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix ENUM_BODY_START= new FormattingPrefix("enum E { A(){void foo(){}} }", "){v" , CodeFormatter.K_COMPILATION_UNIT); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix ENUM_BODY_END= new FormattingPrefix("enum E { A(){void foo(){ }}, B}", "}}," , CodeFormatter.K_COMPILATION_UNIT); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix WILDCARD_EXTENDS= new FormattingPrefix("A<? extends B> a;", "? extends B" , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix WILDCARD_SUPER= new FormattingPrefix("A<? super B> a;", "? super B" , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$

	public final Prefix FIRST_ENUM_CONST= new FormattingPrefix("enum E { X;}", "{ X" , CodeFormatter.K_COMPILATION_UNIT); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix ANNOTATION_SEPARATION= new FormattingPrefix("@A @B class C {}", "A @" , CodeFormatter.K_COMPILATION_UNIT); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix PARAM_ANNOTATION_SEPARATION= new FormattingPrefix("void foo(@A @B C p) { }", "A @" , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix LOCAL_ANNOTATION_SEPARATION= new FormattingPrefix("@A @B C p;", "A @" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix TYPE_ANNOTATION_SEPARATION= new FormattingPrefix("C<@A @B D> l;", "A @" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix VARARGS= new FormattingPrefix("void foo(A ... a) { }", "A ." , CodeFormatter.K_CLASS_BODY_DECLARATIONS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix TRY_RESOURCES = new FormattingPrefix("try (A a = new A(); B b = new B()) {}", "; B" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	public final Prefix TRY_RESOURCES_PAREN = new FormattingPrefix("try (A a = new A(); B b = new B()) {}", "y (" , CodeFormatter.K_STATEMENTS); //$NON-NLS-1$ //$NON-NLS-2$
	
	public final BlockContext IF_BLOCK_WITH_ELSE= new BlockFormattingPrefixSuffix("if (true)", "else{}", 8); //$NON-NLS-1$ //$NON-NLS-2$
	public final BlockContext IF_BLOCK_NO_ELSE= new BlockFormattingPrefix("if (true)", 8); //$NON-NLS-1$
	public final BlockContext ELSE_AFTER_STATEMENT= new BlockFormattingPrefix("if (true) foo();else ", 15); //$NON-NLS-1$
	public final BlockContext ELSE_AFTER_BLOCK= new BlockFormattingPrefix("if (true) {}else ", 11); //$NON-NLS-1$
	
	public final Prefix CASE_SEPARATION= new FormattingPrefix("case A, B", "A" , CodeFormatter.K_EXPRESSION); //$NON-NLS-1$ //$NON-NLS-2$

	public final BlockContext FOR_BLOCK= new BlockFormattingPrefix("for (;;) ", 7); //$NON-NLS-1$
	public final BlockContext WHILE_BLOCK= new BlockFormattingPrefix("while (true)", 11); //$NON-NLS-1$
	public final BlockContext DO_BLOCK= new BlockFormattingPrefixSuffix("do ", "while (true);", 1); //$NON-NLS-1$ //$NON-NLS-2$

}