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Class espresso.classfile.classgen.ConstantPoolGen

java.lang.Object
   |
   +----espresso.classfile.classgen.ConstantPoolGen

public final class ConstantPoolGen
extends Object
implements Constants

This class is used to consequently build up a constant pool. The user adds constants via `addXXX' methods, `addString', `addClass', etc.. These methods return an index into the constant pool. Finally, `getFinalConstantPool()' returns the constant pool built up. Intermediate versions of the constant pool can be obtained with `getConstantPool()'. A constant pool has capacity for Constants.MAX_SHORT entries. Note that the first (0) is used by the JVM and that Double and Long constants need two slots entries.

See Also:: Constant

constants
cp
index

ConstantPoolGen(): Create empty constant pool.
ConstantPoolGen(Constant[]): Initialize with given array of constants.
ConstantPoolGen(ConstantPool): Initialize with given constant pool.

addClass(String): Add a new Class reference to the ConstantPool, if it is not already in there.
addConstant(Constant): Add a given constant (without checking for double entries).
addDouble(double): Add a new double constant to the ConstantPool, if it is not already in there.
addFieldref(String, String, String): Add a new Fieldref constant to the ConstantPool, if it is not already in there.
addFloat(float): Add a new Float constant to the ConstantPool, if it is not already in there.
addInteger(int): Add a new Integer constant to the ConstantPool, if it is not already in there.
addInterfaceMethodref(String, String, String): Add a new InterfaceMethodref constant to the ConstantPool, if it is not already in there.
addLong(long): Add a new long constant to the ConstantPool, if it is not already in there.
addMethodref(String, String, String): Add a new Methodref constant to the ConstantPool, if it is not already in there.
addNameAndType(String, String): Add a new NameAndType constant to the ConstantPool if it is not already in there.
addString(String): Add a new String constant to the ConstantPool, if it is not already in there.
addUnicode(String): Add a new Unicode constant to the ConstantPool, if it is not already in there.
addUtf8(String): Add a new Utf8 constant to the ConstantPool, if it is not already in there.
getConstant(int)
getConstantPool()
getFinalConstantPool()
getSize()
lookupClass(String): Look for ConstantClass in ConstantPool named `str'.
lookupConstant(Constant): Look up constant in ConstantPool.
lookupDouble(double): Look for ConstantDouble in ConstantPool.
lookupFieldref(String, String, String): Look for ConstantFieldref in ConstantPool.
lookupFloat(float): Look for ConstantFloat in ConstantPool.
lookupInteger(int): Look for ConstantInteger in ConstantPool.
lookupInterfaceMethodref(String, String, String): Look for ConstantInterfaceMethodref in ConstantPool.
lookupLong(long): Look for ConstantLong in ConstantPool.
lookupMethodref(String, String, String): Look for ConstantMethodref in ConstantPool.
lookupNameAndType(String, String): Look for ConstantNameAndType in ConstantPool.
lookupString(String): Look for ConstantString in ConstantPool containing String `str'.
lookupUnicode(String): Look for ConstantUnicode in ConstantPool.
lookupUtf8(String): Look for ConstantUtf8 in ConstantPool.

constants

 private Constant constants[]

 private ConstantPool cp

index

 private int index

ConstantPoolGen

 public ConstantPoolGen(Constant c[])

Initialize with given array of constants.

Parameters:: c - array of given constants, new ones will be appended

ConstantPoolGen

 public ConstantPoolGen(ConstantPool cp)

Initialize with given constant pool.

ConstantPoolGen

 public ConstantPoolGen()

Create empty constant pool.

lookupString

 public final int lookupString(String str)

Look for ConstantString in ConstantPool containing String `str'.

Parameters:: str - String to search for
Returns:: index on success, -1 otherwise

addString

 public final int addString(String str)

Add a new String constant to the ConstantPool, if it is not already in there.

Parameters:: str - String to add
Returns:: index of entry

lookupClass

 public final int lookupClass(String str)

Look for ConstantClass in ConstantPool named `str'.

Parameters:: str - String to search for
Returns:: index on success, -1 otherwise

addClass

 public final int addClass(String str)

Add a new Class reference to the ConstantPool, if it is not already in there.

Parameters:: str - Class to add
Returns:: index of entry

lookupInteger

 public final int lookupInteger(int n)

Look for ConstantInteger in ConstantPool.

Parameters:: n - integer number to look for
Returns:: index on success, -1 otherwise

addInteger

 public final int addInteger(int n)

Add a new Integer constant to the ConstantPool, if it is not already in there.

Parameters:: n - integer number to add
Returns:: index of entry

lookupFloat

 public final int lookupFloat(float n)

Look for ConstantFloat in ConstantPool.

Parameters:: n - Float number to look for
Returns:: index on success, -1 otherwise

addFloat

 public final int addFloat(float n)

Add a new Float constant to the ConstantPool, if it is not already in there.

Parameters:: n - Float number to add
Returns:: index of entry

lookupUnicode

 public final int lookupUnicode(String n)

Look for ConstantUnicode in ConstantPool.

Parameters:: n - Unicode string to look for
Returns:: index on success, -1 otherwise

addUnicode

 public final int addUnicode(String n)

Add a new Unicode constant to the ConstantPool, if it is not already in there.

Parameters:: n - Unicode string to add
Returns:: index of entry

lookupUtf8

 public final int lookupUtf8(String n)

Look for ConstantUtf8 in ConstantPool.

Parameters:: n - Utf8 string to look for
Returns:: index on success, -1 otherwise

addUtf8

 public final int addUtf8(String n)

Add a new Utf8 constant to the ConstantPool, if it is not already in there.

Parameters:: n - Utf8 string to add
Returns:: index of entry

lookupLong

 public final int lookupLong(long n)

Look for ConstantLong in ConstantPool.

Parameters:: n - Long number to look for
Returns:: index on success, -1 otherwise

addLong

 public final int addLong(long n)

Add a new long constant to the ConstantPool, if it is not already in there.

Parameters:: n - Long number to add
Returns:: index of entry

lookupDouble

 public final int lookupDouble(double n)

Look for ConstantDouble in ConstantPool.

Parameters:: n - Double number to look for
Returns:: index on success, -1 otherwise

addDouble

 public final int addDouble(double n)

Add a new double constant to the ConstantPool, if it is not already in there.

Parameters:: n - Double number to add
Returns:: index of entry

lookupNameAndType

 public final int lookupNameAndType(String name,
                                    String signature)

Look for ConstantNameAndType in ConstantPool.

Parameters:: name - of variable/method; signature - of variable/method
Returns:: index on success, -1 otherwise

addNameAndType

 public final int addNameAndType(String name,
                                 String signature)

Add a new NameAndType constant to the ConstantPool if it is not already in there.

Parameters:: n - NameAndType string to add
Returns:: index of entry

lookupMethodref

 public final int lookupMethodref(String class_name,
                                  String method_name,
                                  String signature)

Look for ConstantMethodref in ConstantPool.

Parameters:: class_name - Where to find method; method_name - Guess what; signature - return and argument types
Returns:: index on success, -1 otherwise

addMethodref

 public final int addMethodref(String class_name,
                               String method_name,
                               String signature)

Add a new Methodref constant to the ConstantPool, if it is not already in there.

Parameters:: n - Methodref string to add
Returns:: index of entry

lookupInterfaceMethodref

 public final int lookupInterfaceMethodref(String class_name,
                                           String method_name,
                                           String signature)

Look for ConstantInterfaceMethodref in ConstantPool.

Parameters:: class_name - Where to find method; method_name - Guess what; signature - return and argument types
Returns:: index on success, -1 otherwise

addInterfaceMethodref

 public final int addInterfaceMethodref(String class_name,
                                        String method_name,
                                        String signature)

Add a new InterfaceMethodref constant to the ConstantPool, if it is not already in there.

Parameters:: n - InterfaceMethodref string to add
Returns:: index of entry

lookupFieldref

 public final int lookupFieldref(String class_name,
                                 String field_name,
                                 String signature)

Look for ConstantFieldref in ConstantPool.

Parameters:: class_name - Where to find method; field_name - Guess what; signature - return and argument types
Returns:: index on success, -1 otherwise

addFieldref

 public final int addFieldref(String class_name,
                              String field_name,
                              String signature)

Add a new Fieldref constant to the ConstantPool, if it is not already in there.

Parameters:: n - Fieldref string to add
Returns:: index of entry

addConstant

 public final int addConstant(Constant c)

Add a given constant (without checking for double entries).

Parameters:: c - Constant to add
Returns:: index of entry

lookupConstant

 public final int lookupConstant(Constant c)

Look up constant in ConstantPool.

Parameters:: c - constant to look up
Returns:: index on success, -1 otherwise

getConstant

 public Constant getConstant(int i)

Parameters:: i - index in constant pool
Returns:: constant pool entry at index i

getConstantPool

 public ConstantPool getConstantPool()

Returns:: intermediate constant pool

getSize

 public int getSize()

Returns:: current size of constant pool

getFinalConstantPool

 public ConstantPool getFinalConstantPool()

Returns:: constant pool with proper length

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