org.apache.manifoldcf.scriptengine

Class ScriptParser

java.lang.Object

org.apache.manifoldcf.scriptengine.ScriptParser

public class ScriptParser
extends java.lang.Object

Class to parse various syntactical parts of a script and execute them.

Field Summary

Fields

Modifier and Type	Field and Description
protected java.util.Map<java.lang.String,Command>	commands A table of commands that we know how to deal with.
protected org.apache.http.conn.HttpClientConnectionManager	connectionManager The connection manager.
protected java.util.Map<java.lang.String,ContextVariableReference>	context The current variable context.
protected org.apache.http.client.HttpClient	httpClient The client instance
protected java.lang.Integer	httpClientLock The lock for the httpclient factory
protected java.util.Map<java.lang.String,NewOperation>	newOperations A table of "new" operations that we know how to deal with.
protected static int	STATEMENT_BREAK
protected static int	STATEMENT_ISME
protected static int	STATEMENT_NOTME

Constructor Summary

Constructors

Constructor and Description
ScriptParser()

Method Summary

Modifier and Type	Method and Description
void	addCommand(java.lang.String commandName, Command command) Add a command.
void	addNewOperation(java.lang.String operationName, NewOperation operation) Add a "new" operation.
void	addVariable(java.lang.String variableName, Variable v) Add a variable.
static java.lang.String	convertToString(org.apache.http.HttpResponse httpResponse)
protected VariableReference	evaluateExpression_1(TokenStream currentStream)
protected VariableReference	evaluateExpression_2(TokenStream currentStream)
protected VariableReference	evaluateExpression_3(TokenStream currentStream)
protected VariableReference	evaluateExpression_4(TokenStream currentStream)
protected VariableReference	evaluateExpression_5(TokenStream currentStream)
protected VariableReference	evaluateExpression_6(TokenStream currentStream)
VariableReference	evaluateExpression(TokenStream currentStream) Evaluate an expression.
void	execute(TokenStream currentStream) Execute script.
org.apache.http.client.HttpClient	getHttpClient()
static void	localError(TokenStream currentStream, java.lang.String message)
static void	main(java.lang.String[] argv)
protected int	parseStatement(TokenStream currentStream) Parse a single statement.
boolean	parseStatements(TokenStream currentStream) Parse and execute multiple statements.
protected VariableReference	parseVariableReference_0(TokenStream currentStream)
protected VariableReference	parseVariableReference_1(TokenStream currentStream)
protected VariableReference	parseVariableReference_2(TokenStream currentStream)
protected VariableReference	parseVariableReference(TokenStream currentStream)
static Variable	resolveMustExist(TokenStream currentStream, VariableReference vr)
protected boolean	skipExpression_1(TokenStream currentStream)
protected boolean	skipExpression_2(TokenStream currentStream)
protected boolean	skipExpression_3(TokenStream currentStream)
protected boolean	skipExpression_4(TokenStream currentStream)
protected boolean	skipExpression_5(TokenStream currentStream)
protected boolean	skipExpression_6(TokenStream currentStream)
boolean	skipExpression(TokenStream currentStream) Skip an expression.
protected boolean	skipStatement(TokenStream currentStream) Skip a single statement.
void	skipStatements(TokenStream currentStream) Skip multiple statements.
protected boolean	skipVariableReference_0(TokenStream currentStream)
protected boolean	skipVariableReference_1(TokenStream currentStream)
protected boolean	skipVariableReference_2(TokenStream currentStream)
protected boolean	skipVariableReference(TokenStream currentStream)
static void	syntaxError(TokenStream currentStream, java.lang.String message)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

connectionManager

protected org.apache.http.conn.HttpClientConnectionManager connectionManager

The connection manager.

httpClient

protected org.apache.http.client.HttpClient httpClient

The client instance

httpClientLock

protected java.lang.Integer httpClientLock

The lock for the httpclient factory

context

protected java.util.Map<java.lang.String,ContextVariableReference> context

The current variable context.

commands

protected java.util.Map<java.lang.String,Command> commands

A table of commands that we know how to deal with.

newOperations

protected java.util.Map<java.lang.String,NewOperation> newOperations

A table of "new" operations that we know how to deal with.

STATEMENT_NOTME

protected static final int STATEMENT_NOTME

See Also:

Constant Field Values

STATEMENT_ISME

protected static final int STATEMENT_ISME

See Also:

Constant Field Values

STATEMENT_BREAK

protected static final int STATEMENT_BREAK

See Also:

Constant Field Values

Constructor Detail

ScriptParser

public ScriptParser()

Method Detail

addCommand

public void addCommand(java.lang.String commandName,
                       Command command)

Add a command.

Parameters:

commandName - is the name of the command.

command - is the command instance.

addNewOperation

public void addNewOperation(java.lang.String operationName,
                            NewOperation operation)

Add a "new" operation.

Parameters:

operationName - is the name of the operation.

operation - is the operation to create.

addVariable

public void addVariable(java.lang.String variableName,
                        Variable v)
                 throws ScriptException

Add a variable.

Throws:

ScriptException

execute

public void execute(TokenStream currentStream)
             throws ScriptException

Execute script.

Throws:

ScriptException

parseStatements

public boolean parseStatements(TokenStream currentStream)
                        throws ScriptException

Parse and execute multiple statements.

Parameters:

currentStream - is the token stream to parse.

Returns:

true for a break signal.

Throws:

ScriptException

skipStatements

public void skipStatements(TokenStream currentStream)
                    throws ScriptException

Skip multiple statements.

Parameters:

currentStream - is the token stream to parse.

Throws:

ScriptException

parseStatement

protected int parseStatement(TokenStream currentStream)
                      throws ScriptException

Parse a single statement.

Parameters:

currentStream - is the current token stream.

Returns:

a signal indicating either NOTME, ISME, or BREAK.

Throws:

ScriptException

skipStatement

protected boolean skipStatement(TokenStream currentStream)
                         throws ScriptException

Skip a single statement.

Parameters:

currentStream - is the current token stream.

Returns:

true if a statement was detected, false otherwise.

Throws:

ScriptException

evaluateExpression

public VariableReference evaluateExpression(TokenStream currentStream)
                                     throws ScriptException

Evaluate an expression.

Parameters:

currentStream - is the token stream to parse.

Returns:

a VariableReference object if an expression was detected, null otherwise.

Throws:

ScriptException

skipExpression

public boolean skipExpression(TokenStream currentStream)
                       throws ScriptException

Skip an expression.

Parameters:

currentStream - is the token stream to parse.

Returns:

true if an expression was detected, false otherwise.

Throws:

ScriptException

evaluateExpression_1

protected VariableReference evaluateExpression_1(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_1

protected boolean skipExpression_1(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

evaluateExpression_2

protected VariableReference evaluateExpression_2(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_2

protected boolean skipExpression_2(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

evaluateExpression_3

protected VariableReference evaluateExpression_3(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_3

protected boolean skipExpression_3(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

evaluateExpression_4

protected VariableReference evaluateExpression_4(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_4

protected boolean skipExpression_4(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

evaluateExpression_5

protected VariableReference evaluateExpression_5(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_5

protected boolean skipExpression_5(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

evaluateExpression_6

protected VariableReference evaluateExpression_6(TokenStream currentStream)
                                          throws ScriptException

Throws:

ScriptException

skipExpression_6

protected boolean skipExpression_6(TokenStream currentStream)
                            throws ScriptException

Throws:

ScriptException

parseVariableReference

protected VariableReference parseVariableReference(TokenStream currentStream)
                                            throws ScriptException

Throws:

ScriptException

skipVariableReference

protected boolean skipVariableReference(TokenStream currentStream)
                                 throws ScriptException

Throws:

ScriptException

parseVariableReference_0

protected VariableReference parseVariableReference_0(TokenStream currentStream)
                                              throws ScriptException

Throws:

ScriptException

parseVariableReference_1

protected VariableReference parseVariableReference_1(TokenStream currentStream)
                                              throws ScriptException

Throws:

ScriptException

parseVariableReference_2

protected VariableReference parseVariableReference_2(TokenStream currentStream)
                                              throws ScriptException

Throws:

ScriptException

skipVariableReference_0

protected boolean skipVariableReference_0(TokenStream currentStream)
                                   throws ScriptException

Throws:

ScriptException

skipVariableReference_1

protected boolean skipVariableReference_1(TokenStream currentStream)
                                   throws ScriptException

Throws:

ScriptException

skipVariableReference_2

protected boolean skipVariableReference_2(TokenStream currentStream)
                                   throws ScriptException

Throws:

ScriptException

syntaxError

public static void syntaxError(TokenStream currentStream,
                               java.lang.String message)
                        throws ScriptException

Throws:

ScriptException

resolveMustExist

public static Variable resolveMustExist(TokenStream currentStream,
                                        VariableReference vr)
                                 throws ScriptException

Throws:

ScriptException

localError

public static void localError(TokenStream currentStream,
                              java.lang.String message)
                       throws ScriptException

Throws:

ScriptException

convertToString

public static java.lang.String convertToString(org.apache.http.HttpResponse httpResponse)
                                        throws java.io.IOException

Throws:

java.io.IOException

getHttpClient

public org.apache.http.client.HttpClient getHttpClient()

main

public static void main(java.lang.String[] argv)