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## com.vividsolutions.jts.geom
Class IntersectionMatrix

    java.lang.Object
      com.vividsolutions.jts.geom.IntersectionMatrix

All Implemented Interfaces:
  java.lang.Cloneable

public class IntersectionMatrix
extends java.lang.Object
implements java.lang.Cloneable

Models a Dimensionally Extended Nine-Intersection Model (DE-9IM) matrix. This class is used to represent intersection matrices (such as "212FF1FF2") capturing the topological relationship between two `Geometry`s. It can also be represent patterns (such as "T*T******")for matching existing matrices. Methods are provided to:

- set and query the elements of the matrix in a convenient fashion
- convert to and from the standard string representation (specified in SFS Section 2.1.13.2).
- test to see if a matrix matches a given pattern string.

For a description of the DE-9IM, see the OpenGIS Simple Features Specification for SQL. The entries of the matrix are defined by the constants in the `Dimension` class. The indices of the matrix represent the topological locations that occur in a geometry (Interior, Boundary, Exterior). These are provided as constants in the `Location` class.

Version:
  1.7

Constructor Summary
`IntersectionMatrix()` Creates an `IntersectionMatrix` with `FALSE` dimension values.
`IntersectionMatrix(IntersectionMatrix other)` Creates an `IntersectionMatrix` with the same elements as `other`.
`IntersectionMatrix(java.lang.String elements)` Creates an `IntersectionMatrix` with the given dimension symbols.

Method Summary
`void` | `add(IntersectionMatrix im)` Adds one matrix to another.
`int` | `get(int row, int column)` Returns the value of one of this matrix entries.
`boolean` | `isContains()` Tests whether this `IntersectionMatrix` is T*****FF*.
`boolean` | `isCoveredBy()` Returns `true` if this `IntersectionMatrix` is `T*F**F***` or `*TF**F***` or `**FT*F***` or `**F*TF***`
`boolean` | `isCovers()` Returns `true` if this `IntersectionMatrix` is `T*****FF*` or `*T****FF*` or `***T**FF*` or `****T*FF*`
`boolean` | `isCrosses(int dimensionOfGeometryA, int dimensionOfGeometryB)` Tests whether this geometry crosses the specified geometry.
`boolean` | `isDisjoint()` Returns `true` if this `IntersectionMatrix` is FF*FF****.
`boolean` | `isEquals(int dimensionOfGeometryA, int dimensionOfGeometryB)` Returns `true` if this `IntersectionMatrix` is T*F**FFF*.
`boolean` | `isIntersects()` Returns `true` if `isDisjoint` returns false.
`boolean` | `isOverlaps(int dimensionOfGeometryA, int dimensionOfGeometryB)` Returns `true` if this `IntersectionMatrix` is T*T***T** (for two points or two surfaces) 1*T***T** (for two curves) .
`boolean` | `isTouches(int dimensionOfGeometryA, int dimensionOfGeometryB)` Returns `true` if this `IntersectionMatrix` is FT*******, F**T***** or F***T****.
`boolean` | `isWithin()` Tests whether this `IntersectionMatrix` is T*F**F***.
`static boolean` | `matches(int actualDimensionValue, char requiredDimensionSymbol)` Returns true if the dimension value satisfies the dimension symbol.
`boolean` | `matches(java.lang.String requiredDimensionSymbols)` Returns whether the elements of this `IntersectionMatrix` satisfies the required dimension symbols.
`static boolean` | `matches(java.lang.String actualDimensionSymbols, java.lang.String requiredDimensionSymbols)` Returns true if each of the actual dimension symbols satisfies the corresponding required dimension symbol.
`void` | `set(int row, int column, int dimensionValue)` Changes the value of one of this `IntersectionMatrix`s elements.
`void` | `set(java.lang.String dimensionSymbols)` Changes the elements of this `IntersectionMatrix` to the dimension symbols in `dimensionSymbols`.
`void` | `setAll(int dimensionValue)` Changes the elements of this `IntersectionMatrix` to `dimensionValue` .
`void` | `setAtLeast(int row, int column, int minimumDimensionValue)` Changes the specified element to `minimumDimensionValue` if the element is less.
`void` | `setAtLeast(java.lang.String minimumDimensionSymbols)` For each element in this `IntersectionMatrix`, changes the element to the corresponding minimum dimension symbol if the element is less.
`void` | `setAtLeastIfValid(int row, int column, int minimumDimensionValue)` If row >= 0 and column >= 0, changes the specified element to `minimumDimensionValue` if the element is less.
`java.lang.String` | `toString()` Returns a nine-character `String` representation of this `IntersectionMatrix` .
`IntersectionMatrix` | `transpose()` Transposes this IntersectionMatrix.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait`

Constructor Detail

### IntersectionMatrix

    public IntersectionMatrix()

  Creates an `IntersectionMatrix` with `FALSE` dimension values.

### IntersectionMatrix

    public IntersectionMatrix(java.lang.String elements)

  Creates an `IntersectionMatrix` with the given dimension symbols.

Parameters:
  `elements` - a String of nine dimension symbols in row major order

### IntersectionMatrix

    public IntersectionMatrix(IntersectionMatrix other)

  Creates an `IntersectionMatrix` with the same elements as `other`.

Parameters:
  `other` - an `IntersectionMatrix` to copy

Method Detail

### add

    public void add(IntersectionMatrix im)

  Adds one matrix to another. Addition is defined by taking the maximum dimension value of each position in the summand matrices.

  Parameters:
    `im` - the matrix to add

### matches

    public static boolean matches(int actualDimensionValue,
                                  char requiredDimensionSymbol)

  Returns true if the dimension value satisfies the dimension symbol.

  Parameters:
    `actualDimensionValue` - a number that can be stored in the `IntersectionMatrix` . Possible values are `{TRUE, FALSE, DONTCARE, 0, 1, 2}`.
    `requiredDimensionSymbol` - a character used in the string representation of an `IntersectionMatrix`. Possible values are `{T, F, * , 0, 1, 2}`.
  Returns:
    true if the dimension symbol encompasses the dimension value

### matches

    public static boolean matches(java.lang.String actualDimensionSymbols,
                                  java.lang.String requiredDimensionSymbols)

  Returns true if each of the actual dimension symbols satisfies the corresponding required dimension symbol.

  Parameters:
    `actualDimensionSymbols` - nine dimension symbols to validate. Possible values are `{T, F, * , 0, 1, 2}`.
    `requiredDimensionSymbols` - nine dimension symbols to validate against. Possible values are `{T, F, * , 0, 1, 2}`.
  Returns:
    true if each of the required dimension symbols encompass the corresponding actual dimension symbol

### set

    public void set(int row,
                    int column,
                    int dimensionValue)

  Changes the value of one of this `IntersectionMatrix`s elements.

  Parameters:
    `row` - the row of this `IntersectionMatrix`, indicating the interior, boundary or exterior of the first `Geometry`
    `column` - the column of this `IntersectionMatrix`, indicating the interior, boundary or exterior of the second `Geometry`
    `dimensionValue` - the new value of the element

### set

    public void set(java.lang.String dimensionSymbols)

  Changes the elements of this `IntersectionMatrix` to the dimension symbols in `dimensionSymbols`.

  Parameters:
    `dimensionSymbols` - nine dimension symbols to which to set this `IntersectionMatrix` s elements. Possible values are `{T, F, * , 0, 1, 2}`

### setAtLeast

    public void setAtLeast(int row,
                           int column,
                           int minimumDimensionValue)

  Changes the specified element to `minimumDimensionValue` if the element is less.

  Parameters:
    `row` - the row of this `IntersectionMatrix` , indicating the interior, boundary or exterior of the first `Geometry`
    `column` - the column of this `IntersectionMatrix` , indicating the interior, boundary or exterior of the second `Geometry`
    `minimumDimensionValue` - the dimension value with which to compare the element. The order of dimension values from least to greatest is `{DONTCARE, TRUE, FALSE, 0, 1, 2}`.

### setAtLeastIfValid

    public void setAtLeastIfValid(int row,
                                  int column,
                                  int minimumDimensionValue)

  If row >= 0 and column >= 0, changes the specified element to `minimumDimensionValue` if the element is less. Does nothing if row <0 or column < 0.

  Parameters:
    `row` - the row of this `IntersectionMatrix` , indicating the interior, boundary or exterior of the first `Geometry`
    `column` - the column of this `IntersectionMatrix` , indicating the interior, boundary or exterior of the second `Geometry`
    `minimumDimensionValue` - the dimension value with which to compare the element. The order of dimension values from least to greatest is `{DONTCARE, TRUE, FALSE, 0, 1, 2}`.

### setAtLeast

    public void setAtLeast(java.lang.String minimumDimensionSymbols)

  For each element in this `IntersectionMatrix`, changes the element to the corresponding minimum dimension symbol if the element is less.

  Parameters:
    `minimumDimensionSymbols` - nine dimension symbols with which to compare the elements of this `IntersectionMatrix`. The order of dimension values from least to greatest is `{DONTCARE, TRUE, FALSE, 0, 1, 2}` .

### setAll

    public void setAll(int dimensionValue)

  Changes the elements of this `IntersectionMatrix` to `dimensionValue` .

  Parameters:
    `dimensionValue` - the dimension value to which to set this `IntersectionMatrix` s elements. Possible values `{TRUE, FALSE, DONTCARE, 0, 1, 2}` .

### get

    public int get(int row,
                   int column)

  Returns the value of one of this matrix entries. The value of the provided index is one of the values from the `Location` class. The value returned is a constant from the `Dimension` class.

  Parameters:
    `row` - the row of this `IntersectionMatrix`, indicating the interior, boundary or exterior of the first `Geometry`
    `column` - the column of this `IntersectionMatrix`, indicating the interior, boundary or exterior of the second `Geometry`
  Returns:
    the dimension value at the given matrix position.

### isDisjoint

    public boolean isDisjoint()

  Returns `true` if this `IntersectionMatrix` is FF*FF****.

  Returns:
    `true` if the two `Geometry`s related by this `IntersectionMatrix` are disjoint

### isIntersects

    public boolean isIntersects()

  Returns `true` if `isDisjoint` returns false.

  Returns:
    `true` if the two `Geometry`s related by this `IntersectionMatrix` intersect

### isTouches

    public boolean isTouches(int dimensionOfGeometryA,
                             int dimensionOfGeometryB)

  Returns `true` if this `IntersectionMatrix` is FT*******, F**T***** or F***T****.

  Parameters:
    `dimensionOfGeometryA` - the dimension of the first `Geometry`
    `dimensionOfGeometryB` - the dimension of the second `Geometry`
  Returns:
    `true` if the two `Geometry` s related by this `IntersectionMatrix` touch; Returns false if both `Geometry`s are points.

### isCrosses

    public boolean isCrosses(int dimensionOfGeometryA,
                             int dimensionOfGeometryB)

  Tests whether this geometry crosses the specified geometry.

  The `crosses` predicate has the following equivalent definitions:

  - The geometries have some but not all interior points in common.
  - The DE-9IM Intersection Matrix for the two geometries is
    - T*T****** (for P/L, P/A, and L/A situations)
    - T*****T** (for L/P, L/A, and A/L situations)
    - 0******** (for L/L situations)
  For any other combination of dimensions this predicate returns `false`.

  The SFS defined this predicate only for P/L, P/A, L/L, and L/A situations. JTS extends the definition to apply to L/P, A/P and A/L situations as well. This makes the relation symmetric.

  Parameters:
    `dimensionOfGeometryA` - the dimension of the first `Geometry`
    `dimensionOfGeometryB` - the dimension of the second `Geometry`
  Returns:
    `true` if the two `Geometry`s related by this `IntersectionMatrix` cross.

### isWithin

    public boolean isWithin()

  Tests whether this `IntersectionMatrix` is T*F**F***.

  Returns:
    `true` if the first `Geometry` is within the second

### isContains

    public boolean isContains()

  Tests whether this `IntersectionMatrix` is T*****FF*.

  Returns:
    `true` if the first `Geometry` contains the second

### isCovers

    public boolean isCovers()

  Returns `true` if this `IntersectionMatrix` is `T*****FF*` or `*T****FF*` or `***T**FF*` or `****T*FF*`

  Returns:
    `true` if the first `Geometry` covers the second

### isCoveredBy

    public boolean isCoveredBy()

  Returns `true` if this `IntersectionMatrix` is `T*F**F***` or `*TF**F***` or `**FT*F***` or `**F*TF***`

  Returns:
    `true` if the first `Geometry` is covered by the second

### isEquals

    public boolean isEquals(int dimensionOfGeometryA,
                            int dimensionOfGeometryB)

  Returns `true` if this `IntersectionMatrix` is T*F**FFF*.

  Parameters:
    `dimensionOfGeometryA` - the dimension of the first `Geometry`
    `dimensionOfGeometryB` - the dimension of the second `Geometry`
  Returns:
    `true` if the two `Geometry` s related by this `IntersectionMatrix` are equal; the `Geometry`s must have the same dimension for this function to return `true`

### isOverlaps

    public boolean isOverlaps(int dimensionOfGeometryA,
                              int dimensionOfGeometryB)

  Returns `true` if this `IntersectionMatrix` is
  - T*T***T** (for two points or two surfaces)
  - 1*T***T** (for two curves)
  .

  Parameters:
    `dimensionOfGeometryA` - the dimension of the first `Geometry`
    `dimensionOfGeometryB` - the dimension of the second `Geometry`
  Returns:
    `true` if the two `Geometry`s related by this `IntersectionMatrix` overlap. For this function to return `true`, the `Geometry`s must be two points, two curves or two surfaces.

### matches

    public boolean matches(java.lang.String requiredDimensionSymbols)

  Returns whether the elements of this `IntersectionMatrix` satisfies the required dimension symbols.

  Parameters:
    `requiredDimensionSymbols` - nine dimension symbols with which to compare the elements of this `IntersectionMatrix`. Possible values are `{T, F, * , 0, 1, 2}`.
  Returns:
    `true` if this `IntersectionMatrix` matches the required dimension symbols

### transpose

    public IntersectionMatrix transpose()

  Transposes this IntersectionMatrix.

  Returns:
    this `IntersectionMatrix` as a convenience

### toString

    public java.lang.String toString()

  Returns a nine-character `String` representation of this `IntersectionMatrix` .

  Returns:
    the nine dimension symbols of this `IntersectionMatrix` in row-major order.

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