com.reportmill.base

Class RMKeyChain

java.lang.Object

com.reportmill.base.RMKeyChain

public class RMKeyChain
extends java.lang.Object

This class evaluates a string expression on a given object: RMKeyChain.getValue(object, expression).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static interface	RMKeyChain.Get This is interface is implemented by objects that can get key chain values themselves.
static class	RMKeyChain.Op

Method Summary

Modifier and Type	Method and Description
static void	addFunctionClass(java.lang.Class aClass) Adds a class to the list of classes that RM queries for functions.
static java.lang.String	getAndResetError() Returns the last error encountered by the key chain parser and resets parser.
static java.util.Map	getAssignments() Returns a thread-local assignments map.
static boolean	getBoolValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a boolean for an object and key chain.
java.lang.Object	getChild(int anIndex) Returns the child at the given index in the keychain.
int	getChildCount() Returns the number of children in the keychain.
RMKeyChain	getChildKeyChain(int i) Returns the child at the given index in the keychain as a keychain.
java.lang.String	getChildString(int i) Returns the child at the given index in the keychain as a string.
static double	getDoubleValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a double for an object and key chain.
static java.lang.String	getError() Returns the last error encountered by the key chain parser (or null).
static float	getFloatValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a float for an object and key chain.
static int	getIntValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns an int for an object and key chain.
static RMKeyChain	getKeyChain(java.lang.Object aSource) Returns a keyChain for aSource (should be a String or existing RMKeyChain).
static java.util.List	getListValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a list for an object and key chain.
static java.lang.Number	getNumberValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a number for an object and key chain.
RMKeyChain.Op	getOp() Returns the top level operator of the keychain.
static java.lang.String	getStringValue(java.lang.Object anObj, java.lang.Object aKeyChain) Convenience - returns a string for an object and key chain.
java.lang.Object	getValue() Returns the value of the keychain.
static java.lang.Object	getValue(java.lang.Object anObj, java.lang.Object aKeyChain) Returns the result of evaluating the given key chain on the given object.
static <T> T	getValue(java.lang.Object anObj, java.lang.Object aKeyChain, java.lang.Class<T> aClass) Returns a key value if it is of given class (otherwise null).
static java.lang.Object	getValue(java.lang.Object aRoot, java.lang.Object anObj, RMKeyChain aKeyChain) Returns the result of evaluating the given key chain on the given object.
static java.lang.Object	getValue(java.lang.Object anObj, RMKeyChain aKeyChain) Returns the result of evaluating the given key chain on the given object.
static java.lang.Object	getValueImpl(java.lang.Object aRoot, java.lang.Object anObj, RMKeyChain aKeyChain) Returns the result of evaluating the given key chain on the given object.
java.lang.String	getValueString() Returns the value of the keychain as a string.
boolean	hasOp(RMKeyChain.Op anOp) Returns whether key contains given op.
boolean	hasPageReference() Returns whether given key has a Page/PageMax key reference.
static void	main(java.lang.String[] args) Simple main implementation, so RM's expressions can be used for simple math.
static void	setEnumValue(java.lang.Object anObj, RMKeyChain aKeyChain) Sets the given value for the given key chain + property.
static void	setValue(java.lang.Object anObj, java.lang.Object aKeyChain, java.lang.Object aValue) Sets the given value for the given key chain + property.
static void	setValue(java.lang.Object anObj, RMKeyChain aKeyChain, java.lang.Object aValue) Sets the given value for the given key chain + property.
static void	setValueSafe(java.lang.Object anObj, java.lang.String aKey, java.lang.Object aValue) Sets the value but only prints a warning if it fails.
static void	setValueSilent(java.lang.Object anObj, java.lang.String aKey, java.lang.Object aValue) Tries to set value in given object, ignoring failure exceptions.
RMKeyChain	subchain(int anIndex) Override to give list chance to implement this.
java.lang.String	toString() Returns a string representation of the key chain.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

getKeyChain

public static RMKeyChain getKeyChain(java.lang.Object aSource)

Returns a keyChain for aSource (should be a String or existing RMKeyChain).

getAssignments

public static java.util.Map getAssignments()

Returns a thread-local assignments map.

getOp

public RMKeyChain.Op getOp()

Returns the top level operator of the keychain.

getValue

public java.lang.Object getValue()

Returns the value of the keychain.

getValueString

public java.lang.String getValueString()

Returns the value of the keychain as a string.

getChildCount

public int getChildCount()

Returns the number of children in the keychain.

getChild

public java.lang.Object getChild(int anIndex)

Returns the child at the given index in the keychain.

getChildString

public java.lang.String getChildString(int i)

Returns the child at the given index in the keychain as a string.

getChildKeyChain

public RMKeyChain getChildKeyChain(int i)

Returns the child at the given index in the keychain as a keychain.

subchain

public RMKeyChain subchain(int anIndex)

Override to give list chance to implement this.

getValue

public static java.lang.Object getValue(java.lang.Object anObj,
                                        java.lang.Object aKeyChain)

Returns the result of evaluating the given key chain on the given object.

getValue

public static java.lang.Object getValue(java.lang.Object anObj,
                                        RMKeyChain aKeyChain)

Returns the result of evaluating the given key chain on the given object.

getValue

public static java.lang.Object getValue(java.lang.Object aRoot,
                                        java.lang.Object anObj,
                                        RMKeyChain aKeyChain)

Returns the result of evaluating the given key chain on the given object.

getValueImpl

public static java.lang.Object getValueImpl(java.lang.Object aRoot,
                                            java.lang.Object anObj,
                                            RMKeyChain aKeyChain)

Returns the result of evaluating the given key chain on the given object. Broken out so objects can implement custom getKeyChainValue but still have access to default implementation.

getStringValue

public static java.lang.String getStringValue(java.lang.Object anObj,
                                              java.lang.Object aKeyChain)

Convenience - returns a string for an object and key chain.

getNumberValue

public static java.lang.Number getNumberValue(java.lang.Object anObj,
                                              java.lang.Object aKeyChain)

Convenience - returns a number for an object and key chain.

getIntValue

public static int getIntValue(java.lang.Object anObj,
                              java.lang.Object aKeyChain)

Convenience - returns an int for an object and key chain.

getFloatValue

public static float getFloatValue(java.lang.Object anObj,
                                  java.lang.Object aKeyChain)

Convenience - returns a float for an object and key chain.

getDoubleValue

public static double getDoubleValue(java.lang.Object anObj,
                                    java.lang.Object aKeyChain)

Convenience - returns a double for an object and key chain.

getBoolValue

public static boolean getBoolValue(java.lang.Object anObj,
                                   java.lang.Object aKeyChain)

Convenience - returns a boolean for an object and key chain.

getListValue

public static java.util.List getListValue(java.lang.Object anObj,
                                          java.lang.Object aKeyChain)

Convenience - returns a list for an object and key chain.

getValue

public static <T> T getValue(java.lang.Object anObj,
                             java.lang.Object aKeyChain,
                             java.lang.Class<T> aClass)

Returns a key value if it is of given class (otherwise null).

hasPageReference

public boolean hasPageReference()

Returns whether given key has a Page/PageMax key reference.

hasOp

public boolean hasOp(RMKeyChain.Op anOp)

Returns whether key contains given op.

getError

public static java.lang.String getError()

Returns the last error encountered by the key chain parser (or null).

getAndResetError

public static java.lang.String getAndResetError()

Returns the last error encountered by the key chain parser and resets parser.

setValue

public static void setValue(java.lang.Object anObj,
                            java.lang.Object aKeyChain,
                            java.lang.Object aValue)

Sets the given value for the given key chain + property. This is a real bogus loser implementation.

setValue

public static void setValue(java.lang.Object anObj,
                            RMKeyChain aKeyChain,
                            java.lang.Object aValue)

Sets the given value for the given key chain + property. This is a real bogus loser implementation that only supports Op.Key and Op.Chain.

setEnumValue

public static void setEnumValue(java.lang.Object anObj,
                                RMKeyChain aKeyChain)

Sets the given value for the given key chain + property. This is a real bogus loser implementation.

setValueSafe

public static void setValueSafe(java.lang.Object anObj,
                                java.lang.String aKey,
                                java.lang.Object aValue)

Sets the value but only prints a warning if it fails.

setValueSilent

public static void setValueSilent(java.lang.Object anObj,
                                  java.lang.String aKey,
                                  java.lang.Object aValue)

Tries to set value in given object, ignoring failure exceptions.

toString

public java.lang.String toString()

Returns a string representation of the key chain.

Overrides:

toString in class java.lang.Object

addFunctionClass

public static void addFunctionClass(java.lang.Class aClass)

Adds a class to the list of classes that RM queries for functions.

main

public static void main(java.lang.String[] args)
                 throws java.io.IOException

Simple main implementation, so RM's expressions can be used for simple math.

Throws:

java.io.IOException