Added biome generator and interface.

untested.

src/main/java/ca/recrown/islandsurvivalcraft/worldgen/BiomePerIslandGenerator.java

@@ -0,0 +1,63 @@
+package ca.recrown.islandsurvivalcraft.worldgen;
+
+import java.util.Random;
+
+import org.bukkit.block.Biome;
+import org.bukkit.generator.ChunkGenerator.BiomeGrid;
+
+public class BiomePerIslandGenerator implements IslandBiomeGenerator {
+    private boolean begun;
+    private IslandMapGenerator mapGenerator;
+    private Biome currentIslandBiome;
+    private float currentIslandTemperature;
+    private Biome currentIslandShoreBiome;
+    private BiomeSelector biomeSelector;
+    private Random random;
+    private int worldHeight;
+
+    public BiomePerIslandGenerator(int buildHeight, IslandMapGenerator mapGenerator, Random random, BiomeSelector biomeSelector) {
+        this.worldHeight = buildHeight;
+        this.mapGenerator = mapGenerator;
+        this.random = random;
+    }
+
+    public void beginIslandBiome() {
+        if (begun) throw new IllegalStateException("Already generating biome for one island! Remember to call endIslandBiome() when done with one island.");
+        begun = true;
+        currentIslandTemperature = random.nextFloat() * 2f - 1f;
+        currentIslandBiome = biomeSelector.getLandBiome(currentIslandTemperature);
+        currentIslandShoreBiome = biomeSelector.getShoreBiome(currentIslandBiome, currentIslandTemperature);
+    }
+
+    public void endIslandBiome() {
+        if (!begun) throw new IllegalStateException("Can't end island biome as there wasn't one that was started.");
+        begun = false;
+        currentIslandBiome = null;
+    }
+
+    public void setBiome(Biome biome) {
+
+    }
+
+    public void setTemperature(float temperature) {
+        
+    }
+
+    public void GenerateBiome(int chunkX, int chunkZ, int localX, int localZ, BiomeGrid biome) {
+        if (!begun) throw new IllegalStateException("Please enclose this function call between beginning and ending a biome cycle.");
+        int worldX = chunkX * 16 + localX;
+        int worldZ = chunkZ * 16 + localZ;
+
+        if (mapGenerator.isShore(worldX, worldZ)) {
+            setBiome(localX, localZ, biome, currentIslandShoreBiome);
+        } else {
+            setBiome(localX, localZ, biome, currentIslandBiome);
+        }
+    }
+
+    private void setBiome(int localX, int localZ, BiomeGrid biomeGrid, Biome biome) {
+        for (int y = 0; y < worldHeight; y++) {
+            biomeGrid.setBiome(localX, y, localZ, biome);
+        }
+    }
+}

src/main/java/ca/recrown/islandsurvivalcraft/worldgen/IslandBiomeGenerator.java

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+package ca.recrown.islandsurvivalcraft.worldgen;
+
+import org.bukkit.block.Biome;
+import org.bukkit.generator.ChunkGenerator.BiomeGrid;
+
+public interface IslandBiomeGenerator {
+    public void beginIslandBiome();
+
+    public void endIslandBiome();
+
+    public void setBiome(Biome biome);
+
+    public void setTemperature(float temperature);
+
+    public void GenerateBiome(int chunkX, int chunkZ, int localX, int localZ, BiomeGrid biome);
+}