19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nashorn.internal.ir; 27 28 import java.util.List; 29 import jdk.nashorn.internal.ir.visitor.NodeVisitor; 30 31 /** 32 * Represents a block used as a statement. 33 */ 34 public class BlockStatement extends Statement { 35 private static final long serialVersionUID = 1L; 36 37 /** Block to execute. */ 38 private final Block block; 39 40 /** 41 * Constructor 42 * 43 * @param block the block to execute 44 */ 45 public BlockStatement(final Block block) { 46 this(block.getFirstStatementLineNumber(), block); 47 } 48 49 /** 50 * Constructor 51 * 52 * @param lineNumber line number 53 * @param block the block to execute 54 */ 55 public BlockStatement(final int lineNumber, final Block block) { 56 super(lineNumber, block.getToken(), block.getFinish()); 57 this.block = block; 58 } 59 60 private BlockStatement(final BlockStatement blockStatement, final Block block) { 61 super(blockStatement); 62 this.block = block; 63 } 64 65 /** 66 * Use this method to create a block statement meant to replace a single statement. 67 * @param stmt the statement to replace 68 * @param newStmts the statements for the new block statement 69 * @return a block statement with the new statements. It will have the line number, token, and finish of the 70 * original statement. 71 */ 72 public static BlockStatement createReplacement(final Statement stmt, final List<Statement> newStmts) { 73 return createReplacement(stmt, stmt.getFinish(), newStmts); 74 } 75 76 /** 77 * Use this method to create a block statement meant to replace a single statement. 78 * @param stmt the statement to replace 79 * @param finish the new finish for the block 80 * @param newStmts the statements for the new block statement 81 * @return a block statement with the new statements. It will have the line number, and token of the 82 * original statement. 83 */ 84 public static BlockStatement createReplacement(final Statement stmt, final int finish, final List<Statement> newStmts) { 85 return new BlockStatement(stmt.getLineNumber(), new Block(stmt.getToken(), finish, newStmts)); 86 } 87 88 @Override 89 public boolean isTerminal() { 90 return block.isTerminal(); 91 } 92 93 @Override 94 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { 95 if (visitor.enterBlockStatement(this)) { 96 return visitor.leaveBlockStatement(setBlock((Block)block.accept(visitor))); 97 } 98 99 return this; 100 } 101 102 @Override 103 public void toString(final StringBuilder sb, final boolean printType) { 104 block.toString(sb, printType); 105 } 106 107 /** 108 * Return the block to be executed 109 * @return the block 110 */ 111 public Block getBlock() { 112 return block; 113 } 114 115 /** 116 * Reset the block to be executed 117 * @param block the block 118 * @return new or same execute node 119 */ 120 public BlockStatement setBlock(final Block block) { 121 if (this.block == block) { 122 return this; 123 } 124 return new BlockStatement(this, block); 125 } 126 } | 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 package jdk.nashorn.internal.ir; 27 28 import java.util.List; 29 import jdk.nashorn.internal.ir.visitor.NodeVisitor; 30 31 /** 32 * Represents a block used as a statement. 33 */ 34 public class BlockStatement extends Statement { 35 private static final long serialVersionUID = 1L; 36 37 /** Block to execute. */ 38 private final Block block; 39 /** is this a synthetic block? */ 40 private boolean synthetic; 41 42 /** 43 * Constructor 44 * 45 * @param block the block to execute 46 */ 47 public BlockStatement(final Block block) { 48 this(block.getFirstStatementLineNumber(), block, true); 49 } 50 51 /** 52 * Constructor 53 * 54 * @param lineNumber line number 55 * @param block the block to execute 56 */ 57 public BlockStatement(final int lineNumber, final Block block, final boolean synthetic) { 58 super(lineNumber, block.getToken(), block.getFinish()); 59 this.block = block; 60 this.synthetic = synthetic; 61 } 62 63 private BlockStatement(final BlockStatement blockStatement, final Block block, final boolean synthetic) { 64 super(blockStatement); 65 this.block = block; 66 this.synthetic = synthetic; 67 } 68 69 /** 70 * Use this method to create a block statement meant to replace a single statement. 71 * @param stmt the statement to replace 72 * @param newStmts the statements for the new block statement 73 * @return a block statement with the new statements. It will have the line number, token, and finish of the 74 * original statement. 75 */ 76 public static BlockStatement createReplacement(final Statement stmt, final List<Statement> newStmts) { 77 return createReplacement(stmt, stmt.getFinish(), newStmts); 78 } 79 80 /** 81 * Use this method to create a block statement meant to replace a single statement. 82 * @param stmt the statement to replace 83 * @param finish the new finish for the block 84 * @param newStmts the statements for the new block statement 85 * @return a block statement with the new statements. It will have the line number, and token of the 86 * original statement. 87 */ 88 public static BlockStatement createReplacement(final Statement stmt, final int finish, final List<Statement> newStmts) { 89 return new BlockStatement(stmt.getLineNumber(), new Block(stmt.getToken(), finish, newStmts), true); 90 } 91 92 @Override 93 public boolean isTerminal() { 94 return block.isTerminal(); 95 } 96 97 public boolean isSynthetic() { 98 return synthetic; 99 } 100 101 @Override 102 public Node accept(final NodeVisitor<? extends LexicalContext> visitor) { 103 if (visitor.enterBlockStatement(this)) { 104 return visitor.leaveBlockStatement(setBlock((Block)block.accept(visitor))); 105 } 106 107 return this; 108 } 109 110 @Override 111 public void toString(final StringBuilder sb, final boolean printType) { 112 block.toString(sb, printType); 113 } 114 115 /** 116 * Return the block to be executed 117 * @return the block 118 */ 119 public Block getBlock() { 120 return block; 121 } 122 123 /** 124 * Reset the block to be executed 125 * @param block the block 126 * @return new or same execute node 127 */ 128 public BlockStatement setBlock(final Block block) { 129 if (this.block == block) { 130 return this; 131 } 132 return new BlockStatement(this, block, synthetic); 133 } 134 } |